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1
Safe and Environmentally Acceptable Sol-Gel-Derived ...
2004-07-01

... with H2 � 12 Figure 5. FT-IR spectra of ... the materials that create a passivation layer on the ... Fourier transform-infrared (FTIR) spectra were collected ...

DTIC Science & Technology

2
Safe and Environmentally Acceptable Sol-Gel-Derived ...
2004-07-01

... All resulting materials were characterized by thermal gravimetric analysis (TGA), differential thermal analysis (DTA), powder X-ray diffraction (PXRD ...

DTIC Science & Technology

3
SOL-GEL Derived Ferroelectric Thin Films in Silicon ...
1991-04-05

... Accession Number : ADP006656. Title : SOL-GEL Derived Ferroelectric Thin Films in Silicon Micromachining,. Corporate ...

DTIC Science & Technology

4
SOL-GEL DERIVED CERAMIC COATINGS

... Title : SOL-GEL DERIVED CERAMIC COATINGS. Corporate Author : ... The most important driving force behind the growth of sol-gel coatings is cost. ...

DTIC Science & Technology

5
Sol-gel processes and materials. January 1970-August 1988 (Citations from the US Patent data base). Report for January 1970-August 1988
1988-08-01

This bibliography contains citations of selected patents concerning Sol-Gel processes and Sol-Gel derived materials and products. Selected patents include Sol-Gel compositions, ceramic and refractory materials, fabrication of silica glass, cataylsts and catalyst supports, nuclear fuels preparation, abrasives for grinding wheels, ...

Energy Citations Database

6
Sol-Gel Derived R-GRIN Doped-Silica Lenses,
1992-03-01

... Accession Number : ADP006420. Title : Sol-Gel Derived R-GRIN Doped-Silica Lenses,. Corporate Author : HITACHI CABLE ...

DTIC Science & Technology

7
Sol-Gel-Derived AR Coatings for Solar Receivers.
1984-01-01

This report details a process for applying sol-gel antireflection (AR) coatings to solar receiver envelopes. The process consists of applying a porous film which is subsequently etched to achieve the optimum AR effect. The result is a single-layer interfe...

National Technical Information Service (NTIS)

8
Sol-Gel Processing of Metal-Oxide-Semiconductor Structures.
1988-01-01

We have investigated the electronic properties of sol-gel derived films on silicon substrates. Our investigation involves SiO sub 2 , aluminosilicate and borosilicate oxides on silicon. Some sol-gel oxides are excellent insulators; some sol-gel films on s...

National Technical Information Service (NTIS)

9
Sol-gel processes and materials. (Latest citations from the US Patent bibliographic file with exemplary claims). Published Search
1995-12-01

The bibliography contains citations of selected patents concerning sol-gel processes and sol-gel derived materials and products. Selected patents include sol-gel compositions, ceramic and refractory materials, fabrication of silica glass, sol-gel thin films and coatings, transparent inorganic oxide glass, ...

Energy Citations Database

10
Chemical Processing of Nanostructured Coatings
2011-05-14

... PF, Van Noort, R (1998) Sol-gel derived calcium phosphate coatings for ... derived lead titanate thin films, Journal of Materials Science, 32, 5961-68. ...

DTIC Science & Technology

11
Supercapacitors and Batteries from Sol-Gel Derived Carbon ...
2001-02-07

... deal with the synthesis, characterization and modeling of supercapacitors and lithium ... were to produce a new class of sol-gel based capacitors and ...

DTIC Science & Technology

12
Sol-Gel Derived, Nanostructured Oxide Lubricant Coatings
2000-11-30

... methods, also referred to as sol-gel, which showed excellent ... SCANNING ELECTRON MICROSCOPES, MICROSTRUCTURE, SILICON DIOXIDE, X ...

DTIC Science & Technology

13
Sol-Gel Derived Gradient Index Optical Materials,
1992-03-01

... Abstract : Gradient index optics will play an increasingly important role in applications such as fax machines, photocopiers, fiber optic couplers and ...

DTIC Science & Technology

14
SOL-GEL DERIVED THICK ZRO(2) COATINGS BY LIQUID ...

... THE CERAMIC DEPOSITION WAS CARRIED OUT SPRAYING THE SOL WITH A ... COATINGS BY WET-SPRAY DEPOSITIONS SHOWED A ...

DTIC Science & Technology

15
SOL-GEL DERIVED THICK FILM AMPEROMETRIC IMMUNOSENSORS

There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....

EPA Science Inventory

16
PREPARATION OF DENSE BATIO(3) CERAMICS FROM SOL ...

... Title : PREPARATION OF DENSE BATIO(3) CERAMICS FROM SOL-GEL-DERIVED MONOLITHIC GELS. Corporate Author : ...

DTIC Science & Technology

17
Multi-Element Sol-Gel-Derived Integrated Optic Chemical Sensor

The success of the proposed project will lead to the development of a sol-gel fabrication technique for use in integrated optic chemical sensors. ...

NASA Website

18
Ceramics Derived from Organo-Metallic Polymers
1988-07-01

... Page 4. II. PTFE - SILICATE COMPOSITES VIA SOL-GEL PROCESSING Polytetrafluoroethylene (PTFE) is an organic polymer with a combination ...

DTIC Science & Technology

19
Assessment of Japanese Technology in Advanced Glass and ...
1992-06-01

... they showed an Al alloy matrix composite specimen ... Colloid Research Institute Sol-Gel Derived Oxynitride ... of a new type of silicon oxynitride glass ...

DTIC Science & Technology

20
Sol-gel processes. January 1970-September 1988 (Citations from the NTIS database). Report for January 1970-September 1988
1988-09-01

This bibliography contains citations concerning the development and utilization of sol-gel processes and techniques. Topics include antireflective coatings, studies of sol-gel transitions, sol-gel synthesis and polymerization, sol-gel derived thin films and glasses, and sol-gel production of microspheres. Applications in nuclear waste ...

Energy Citations Database

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21
Safe and Environmentally Acceptable Sol-gel Derived Pyrophoric Pyrotechnics
2004-06-10

It was demonstrated that highly porous sol-gel derived iron (III) oxide materials could be reduced to sub-micron-sized metallic iron by heating the materials to intermediate temperatures in a hydrogen atmosphere. Through a large number of experiments complete reduction of the sol-gel based materials was realized with a variety of hydrogen-based atmospheres ...

DOE Information Bridge

22
Sol-gel derived silica/siloxane composite materials: The effect of loading level and catalyst activity on silica domain formation.
1993-01-01

Currently, the production of in situ reinforcement in polymeric systems by sol-gel methods is undergoing rapid development. However, understanding of synthesis/structure/property relationships is still lacking. In order to produce sol-gel derived composit...

National Technical Information Service (NTIS)

23
Sol-Gel Derived AR Coatings.
1983-01-01

Porous sol-gel derived films prepard from aged polymeric solutions were deposited on PYREX and etched to produce AR coatings with solar averaged transmittance values greater than 0.97. This process appeared to produce single layer interference films rathr...

National Technical Information Service (NTIS)

24
Thick Sol-Gel Derived YBa(sub 2)Cu(sub 3)O(sub 7-x) Films.
2000-01-01

Sol-gel deposition of YBa(sub 2)Cu(sub 3)O(sub 7-8) (YBCO) holds great potential as a fast and efficient method of producing large-scale, biaxially-textured superconducting films at a lower cost than physical and chemical vapor deposition techniques. Howe...

National Technical Information Service (NTIS)

25
Glucose sensing based on the intrinsic fluorescence of sol-gel immobilized yeast hexokinase

Glucose sensing based on the intrinsic fluorescence of sol-gel immobilized yeast hexokinase Faeiza in a silica sol-gel matrix as a potential in vivo glucose sensor for use in patients with diabetes-related fluorescence response. When entrapped in tetramethylorth- osilicate-derived sol gel, hexokinase retained

E-print Network

26
Electrical Properties of Metal-Oxide-Silicon Structures with Sol-Gel Oxides.
1988-01-01

The authors have investigated the electronic properties of sol-gel derived films on silicon substrates. Our investigation involves SiO sub 2 , aluminosilicate and borosilicate oxides on silicon. Some sol-gel oxides are excellent insulators; some sol-gel f...

National Technical Information Service (NTIS)

27
Sol-gel kinetics by NMR
1991-01-01

The chemical synthesis of advanced ceramic and glass materials by the sol-gel process has become an area of increasing activity in the field of material science. The sol-gel process provides a means to prepare homogeneous, high purity materials with tailored chemical and physical properties. This paper surveyed the nuclear magnetic resonance (NMR) studies of silicon-based ...

Energy Citations Database

28
Passive and active sol-gel materials and devices
1997-07-01

This paper examines sol-gel materials for photonics in terms of partnerships with other material contenders for processing optical devices. The discussion in four sections identifies semiconductors, amorphous and crystalline inorganic dielectrics, and amorphous and crystalline organic dielectrics as strategic agents in the rapidly evolving area of materials and devices for ...

NASA Astrophysics Data System (ADS)

29
Envionmentally Benign Stab Detonators.
2003-01-01

This effort attempts to demonstrate that environmentally acceptable energetic sol-gel coated flash metal multilayer nanocomposites can be used to replace current impact initiated devices (IIDs) which have hazardous and toxic components. Successful complet...

National Technical Information Service (NTIS)

30
Sol-Gel Derived Surface Treatments for Aircraft Aluminum Alloys.
2002-01-01

Technologies for providing enhanced corrosion resistance for 2024-T3 aluminum alloy were investigated. This program investigated: (a) laser processing of metal surfaces to obtain optimum corrosion resistance and (b) the development of sol-gel derived coat...

National Technical Information Service (NTIS)

31
Reliability of Sol-Gel Derived Ferroelectric Memories
1992-07-01

... Reliability of Sol-Gel Derived Ferroelectric Memories DAALO3-89-K-0104 ... Sol-Gel processing; fatigue; retention; ferroelectric thin r11ms, memories ...

DTIC Science & Technology

32
Reliability of Sol-Gel Derived Ferroelectric Memories
1992-07-01

... Reliability of Sol-Gel Derived Ferroelectric Memories DAAL03-89-K-0104 ... Sol-Gel processing; fatigue; retention; ferroelectric thin films, memories ...

DTIC Science & Technology

33
Sol-gel processes and materials. (Latest citations from the Aerospace database). Published Search
1994-11-01

The bibliography contains citations concerning design and development of sol-gel processes and sol-gel derived materials. Sol-gel derived materials include protective and transparent films, ceramic coatings, nanocomposites and microcomposites, porous and dense composites, fiber reinforced composites, oxides, and ductile ceramics. ...

Energy Citations Database

34
Sol-gel processes and materials. (Latest citations from the Aerospace database). Published Search
1994-01-01

The bibliography contains citations concerning design and development of sol-gel processes and sol-gel derived materials. Sol-gel derived materials include protective and transparent films, ceramic coatings, nanocomposites and microcomposites, porous and dense composites, fiber reinforced composites, oxides, and ductile ceramics. ...

Energy Citations Database

35
Ultrastructure Processing and Environmental Stability of Advanced Structural and Electronic Materials.
1988-01-01

The objective of our Multi-Investigator Research Program is to achieve an understanding of the science of chemically derived, ultrastructure processing of ceramics, glasses and composites. Five research areas were pursued. Sol-Gel Processing: Procedures f...

National Technical Information Service (NTIS)

36
Sol-gel derived polytitanosiloxane coatings.
1989-01-01

Amorphous polytitanosiloxane (PTS) was formed by hydrolysis-polycondensation and hydrolysis-polycondensation-pyrolysis reaction of precursor sol solutions consisting of monomeric organosilanes, Ti(OC(sub 2)H(sub 5))(sub 4), methanol, water and hydrochlori...

National Technical Information Service (NTIS)

37
Preparation and Properties of New Inorganic Glasses and Gel-Derived Solids.
1988-01-01

Research has been carried out on two families of solids. This first one involves solids made by the sol gel process and includes composites. The second one involves non-oxide glasses based on fluorides, chalcogenides and chalcohalides. The structures of o...

National Technical Information Service (NTIS)

38
Investigation of Tetherable Distilbazolium Compounds as Fluorescent Probes in Nanostructured Silica Sol-gel Materials¶

... 635. CrossRefUeda, M., H-B. Kim, and K. Ichimura. 1994. Photochemical and thermal isomerization of azobenzene derivatives ... ...

NBII National Biological Information Infrastructure

39
Fundamental studies for sol-gel derived gas-separation membranes.
1995-01-01

We prepared silica membranes using sol-gel techniques and explored the effects of postdeposition sintering, capillary stresses developed during drying, and surface derivatization of the membranes with titanium iso-propoxide. We observed that both partial ...

National Technical Information Service (NTIS)

40
Effect of Boric Acid Addition in Colloidal Sol-Gel Derived SiC ...

... From colloidal silica and saccharose, SiC powders were obtained whose grain size is 100 nm in diameter and which are easily sinterable with ...

DTIC Science & Technology

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41
Catalytic dehydrogenation of propane and isobutane in hydrogen permselective membrane reactors.
1996-01-01

The dehydrogenation of propane and isobutane was studied in hydrogen permselective packed bed membrane reactors and conventional packed bed reactors. Two different types of developmental membranes were investigated: sol-gel derived silica-based membranes ...

National Technical Information Service (NTIS)

42
Sol-gel derived thin films: critical issues
1986-01-01

The critical physical and chemical issues concerning sol-gel-derived thin films are reviewed. The fundamental physical issues which are currently poorly understood are concentration-induced aggregation and gelation and the physics of drying porous media. These phenomena depend in turn on chemical issues such as the relative rates of condensation and evaporation during film ...

Energy Citations Database

43
Sol Gel-Derived SBA-16 Mesoporous Material.
2010-08-31

The aim of this article is to review current knowledge related to the synthesis and characterization of sol gel-derived SBA-16 mesoporous silicas, as well as a review of the state of the art in this issue, to take stock of knowledge about current and future applications. The ease of the method of preparation, the orderly structure, size and shape of their ...

PubMed

44
Sol Gel-Derived SBA-16 Mesoporous Material
2010-08-31

The aim of this article is to review current knowledge related to the synthesis and characterization of sol gel-derived SBA-16 mesoporous silicas, as well as a review of the state of the art in this issue, to take stock of knowledge about current and future applications. The ease of the method of preparation, the orderly structure, size and shape of their ...

PubMed Central

45
Optical activation of Si nanowires using Er-doped, sol-gel derived silica
2005-01-31

Optical activation of Si nanowires (Si-NWs) using sol-gel derived Er-doped silica is investigated. Si-NWs of about 100 nm diameter were grown on Si substrates by the vapor-liquid-solid method using Au catalysts and H{sub 2} diluted SiCl{sub 4}. Afterwards, Er-doped silica sol-gel solution was spin-coated, and annealed at 950 deg. C in ...

Energy Citations Database

46
In vitro cytotoxicity of nitric oxide-releasing sol-gel derived materials.
2005-07-01

The cytotoxicity of bare and PU-coated nitric oxide (NO)-releasing sol-gel derived materials (sol-gels) was investigated using L929 mouse fibroblasts in both direct and indirect contact models to differentiate between the biological impact of the sol-gel matrix and NO release. The flux of NO was varied up to 150 pmol cm(-2) s(-1) using ...

PubMed

47
Environmentally Benign Stab Detonators
2006-07-07

The coupling of energetic metallic multilayers (a.k.a. flash metal) with energetic sol-gel synthesis and processing is an entirely new approach to forming energetic devices for several DoD and DOE needs. They are also practical and commercially viable manufacturing techniques. Improved occupational safety and health, performance, reliability, reproducibility, and ...

DOE Information Bridge

48
Structural, optical and vibrational properties of sol gel titania valproic acid reservoirs
2006-10-01

Organically modified sol gel derived titania xerogels were prepared by co-gellation of titanium n-butoxide and 2-propylpentanoic acid (valproic acid) at room temperature. Materials with different content of valproic acid were obtained varying the concentration of the drug, during the mixing stage of the sol ...

NASA Astrophysics Data System (ADS)

49
Sol-gel derived contamination resistant antireflective coatings
2010-10-01

Silica-based sol-gel antireflective (AR) optical coatings are critical components for high peak power laser systems. It is well known that water vapor and volatile organic compounds in both the laser bay and target bay environments will reduce the antireflective efficiency and laser-damage resistance of the sol-gel AR coating. In this study, alkylation with organosilanes in ...

NASA Astrophysics Data System (ADS)

50
Deposition and interface structures of YBCO thin films via a non-fluorine sol-gel route
2002-06-01

Previous work on YBa2Cu3Ox (YBCO) thin films deposited by fluorine-based sol-gel synthesis has been extensively reported. To further develop grain-textured YBCO thin films for conductor development, we deposited, via a fluorine-free sol-gel synthesis, YBCO thin films on single crystal substrates of yttrium-stabilized zirconia (YSZ) and LaAlO3 (LAO). ...

NASA Astrophysics Data System (ADS)

51
Chemical control of stress in sol-gel derived titania films and their pressure dependent optical properties
1988-04-01

Optical properties and durability of thin films are influenced by strain which can be evaluated from frequency shifts of the lattice phonon lines in measured Raman spectra. The response of titania samples to applied pressure is reported in this work. Anatase and rutile samples of thin films (sol-gel and sputter deposited) and bulk materials have been subjected to hydrostatic ...

Energy Citations Database

52
Sol-Gel Stabilization of Heavy Metal Waste
2000-02-01

... Accession Number : ADA375073. Title : Sol-Gel Stabilization of Heavy Metal Waste. ... Sol-gel chemistry is a means to make glass at low temperatures. ...

DTIC Science & Technology

53
Sol-Gel Optics.

... Accession Number : ADD256380. Title : Sol-Gel Optics. Descriptive ... geometries. Sol-gel processing is particularly suitable for optical materials. ...

DTIC Science & Technology

54
Gradient Index Lenses from Sol-Gel Layering
1994-06-30

... (* -= GRADIENT ILNDEX LENSES FROM SOL-GEL LAYERING ... GRADIENT INDEX LENSES FROM SOL-GEL LAYERING (AN AASERT AWARD) ...

DTIC Science & Technology

55
Sol-gel derived C-SiC composites and protective coatings for sustained durability in the space environment
2003-09-01

Composites and coatings were produced via the fast sol-gel process of a mixture of alkoxysilane precursors. The composites were comprised of carbon fibers, fabrics, or their precursors as reinforcement, and sol-gel-derived silicon carbide as matrix, aiming at high-temperature stable ceramics that can be utilized for re-entry structures. The protective ...

NASA Astrophysics Data System (ADS)

56
SOL-GEL SYNTHESIS OF ADVANCED MICROWAVE ...

... Title : SOL-GEL SYNTHESIS OF ADVANCED MICROWAVE CERAMICS AND THEIR DIELECTRIC PROPERTIES. Corporate Author : ...

DTIC Science & Technology

57
SOL-GEL PROCESSING AND STRUCTURE DEVELOPMENT ...

... Title : SOL-GEL PROCESSING AND STRUCTURE DEVELOPMENT OF LEAD TITANATE PARTICLES. Corporate Author : ...

DTIC Science & Technology

58
Manufacture of Regularly Shaped Sol-Gel Pellets
2006-01-01

An extrusion batch process for manufacturing regularly shaped sol-gel pellets has been devised as an

NASA Technical Reports Server (NTRS)

59
Optical spectroscopy of trivalent chromium in sol-gel lithium niobate
2005-12-19

We report on the characterization of sol-gel derived lithium niobate via trivalent chromium probe ions, a study that is motivated by recent reports on the synthesis of high quality sol-gel lithium niobate (LiNbO{sub 3}). In order to assess the quality of sol-gel derived LiNbO{sub 3}, we incorporate Cr{sup 3+} during the hydrolysis ...

Energy Citations Database

60
Electronic properties of sol-gel-derived oxides on silicon
1987-10-12

Sol-gel-derived SiO/sub 2/, borosilicate, and aluminosilicate thin films deposited on silicon and heated for 5 min at temperatures of 1000 /sup 0/C or lower exhibit dielectric strength as great as 5 MV/cm and interface state densities as low as --1 x 10/sup 11//cm/sup 2/ eV. These values represent significant improvements over previous sol-gel-derived ...

Energy Citations Database

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61
Sol-gel derived nanostructured cerium oxide film for glucose sensor
2008-06-01

Sol-gel derived nanostructured cerium oxide (CeO2) film deposited on gold (Au) electrode has been utilized for physisorption of glucose oxidase (GOx). X-ray diffraction, atomic force microscopy, UV-visible spectroscopy, and electrochemical techniques have been used to characterize sol-gel derived CeO2/Au electrode ...

NASA Astrophysics Data System (ADS)

62
Protein interactions with nanoporous sol-gel derived bioactive glasses.
2011-06-30

Sol-gel derived bioactive glasses are excellent candidates for bone regenerative implant materials as they bond with bone, stimulate bone growth and degrade in the body. Their interactions with proteins are critical to understanding their performance after implantation. This study focuses on the interactions between fibrinogen and sol-gel glass particles ...

PubMed

63
Kinetics and structure of silicate sol-gels
1990-01-01

The structure of a silicate sol-gel derived material depends on the nature of its reaction kinetics. The chemical state of the silicate sol-gel is characterized by both the functional group concentrations and the distribution of the functional groups about a single silicon atom. {sup 29}Si nuclear magnetic resonance (NMR) spectroscopy ...

Energy Citations Database

64
Comparisons between surfactant-templated mesoporous and conventional sol gel-derived CaO B2O3 SiO2 glasses: Compositional, textural and in vitro bioactive properties
2008-04-01

Compositional, textural and in vitro bioactive comparisons between surfactant-templated mesoporous (MCBS) and conventional sol gel-derived CaO B2O3 SiO2 (CBS) glasses are studied in this paper. CBS glasses are heterogeneous in composition. Due to the heterogeneity, melting boron oxide that formed during the heat treatment will fill in the pores that should ...

NASA Astrophysics Data System (ADS)

65
Optimization and evaluation of thermoresponsive diclofenac sodium ophthalmic in situ gels.
2011-04-01

This work was conducted to optimize and evaluate Pluronic F127-based thermoresponsive diclofenac sodium ophthalmic in situ gels (DS in situ gel). They were prepared by cold method and investigated their physicochemical properties i.e., pH, flow ability, sol-gel transition temperature, gelling capacity and rheological properties. An optimized formulation was selected and ...

PubMed

66
MECHANICAL PROPERTY CHARACTERIZATION OF SOL-GEL DERIVED NANOMATERIALS

the Physics and Chemistry of Sol-gel Processing, Academic Press Inc., San Diego, CA, 1990 4 Prakash, S.S., Sol-gelMECHANICAL PROPERTY CHARACTERIZATION OF SOL-GEL DERIVED NANOMATERIALS USING AN ACOUSTIC WAVE Terra........ iii #12;MECHANICAL PROPERTY CHARACTERIZATION OF SOL-GEL DERIVED NANOMATERIALS USING

E-print Network

67
Sol-gel replicated optics made from single point diamond turned masters exhibit fractal surface roughness
1996-05-01

Deterministic optics manufacturing, notably single point diamond turning (SPDT) has matured such that the current generation of machines is capable of producing refractive and reflective optics for the visible wavelength region that are quite acceptable for many applications. However, spiral tool marks are still produced that result in unwanted diffractive scattering from ...

Energy Citations Database

68
Preparation and complex characterization of silica holmium sol-gel monoliths.
2010-12-05

Amorphous, sol-gel derived SiO(2) are known to biocompatible and bioresorbable materials. Biodegradable and inert materials containing radioactive isotopes have potential application as delivery vehicles of the beta radiation to the cancer tumors inside the body. Incorporation of holmium in the sol-gel derived SiO(2) could lead to the ...

PubMed

69
Sol-gel derived silica/siloxane composite materials: The effect of loading level and catalyst activity on silica domain formation
1993-11-01

Currently, the production of in situ reinforcement in polymeric systems by sol-gel methods is undergoing rapid development. However, understanding of synthesis/structure/property relationships is still lacking. In order to produce sol-gel derived composite materials with sufficient mechanical properties for commercial applications, this deficit of ...

Energy Citations Database

70
High-field ZnO varistors: microstructures and properties
1985-06-01

Zinc oxide varistors capable of supporting a high electric field before breakdown have been developed by use of sol-gel processing. Fine powders produced by the sol-gel technique can be fabricated into varistors by either hot pressing or pressureless sintering. Several model compositions were studied, including ZnO plus three additives and ZnO plus five additives. ...

Energy Citations Database

71
Effect of 193 and 157 nm laser light illumination on the surface properties of TMOS-NiCl2 sol-gel derived material
2010-12-01

Sol-gel tetramethoxyorthosilicate (TMOS) derived composite thin films comprising embedded NiCl2 nanoparticles, were illuminated and processed by 193 and 157 nm excimer laser radiation. The effect of different laser fluences of 193 nm and the number of 157 nm pulses on the material surface was studied. Atomic force microscopy imaging was used to evaluate ...

NASA Astrophysics Data System (ADS)

72
Spectroscopic studies of triethoxysilane sol-gel and coating process.
2007-10-23

Silica sol-gels have been prepared under different conditions using triethoxysilane (TES) as precursor. The prepared sol-gels have been used to coat aluminum for corrosion protection. Vibrational assignments have been made for most vibration bands of TES, TES sol-gel, TES sol-gel-coated aluminum and xerogel. It has ...

PubMed

73
Sol-Gel Derived Nanocrystalline Fluoridated Hydroxyapatite Powders and Nanostructured Coatings for Tissue Engineering Applications
2010-12-01

Nanocrystalline fluoridated hydroxyapatite (FHA) powders and coatings with a chemical composition of Ca10(PO4)6OH2-x F x (where x values were selected equal to 0.0 ,0.5, 1.0, 1.5, and 2.0) were prepared through a modified simple sol-gel technique in comparison with conventional alkoxide-based sol-gel route. X-ray diffraction (XRD), transmission electron ...

NASA Astrophysics Data System (ADS)

74
Sol-Gel Derived Nanocrystalline Fluoridated Hydroxyapatite Powders and Nanostructured Coatings for Tissue Engineering Applications
2010-12-01

Nanocrystalline fluoridated hydroxyapatite (FHA) powders and coatings with a chemical composition of Ca10(PO4)6OH2�x F x (where x values were selected equal to 0.0 ,0.5, 1.0, 1.5, and 2.0) were prepared through a modified simple sol-gel technique in comparison with conventional alkoxide-based sol-gel route. X-ray diffraction (XRD), transmission electron ...

NASA Astrophysics Data System (ADS)

75
Sol-gel derived thin films. [Silicates
1987-01-01

The microstructure of sol-gel-derived thin films can be manipulated by control of the precursor strtucture prior to deposition and the relative rates of condensation and evaporation during deposition. In general weakly branched precursors deposited under conditions in which the condensation rate is low result in very compact, microporous films. Increased branching of the ...

Energy Citations Database

76
Optical Fiber Chemical Sensor with Sol-Gel Derived Refractive Material as Transducer for High Temperature Gas Sensing in Clean Coal Technology (Final Report, October 1, 2004-December 31, 2006).
2007-01-01

The chemistry of sol-gel derived silica and refractive metal oxide has been systematically studied. Sol-gel processes have been developed for preparing porous silica and semiconductor metal oxide materials. Micelle/reversed micelle techniques have been de...

National Technical Information Service (NTIS)

77
Micro-PIXE characterization of interactions between a sol-gel derived bioactive glass and

-14Jun2007 #12;- 4 - Sol-gel glasses in the SiO2-CaO system have been proved to form a calcium phosphate phosphate-rich layer as a trace element (as visible in Figure 4). In the inner glass, Si and Ca showed- 1 - Micro-PIXE characterization of interactions between a sol-gel derived bioactive glass

E-print Network

78
Enhanced piezoelectric properties of lead zirconate titanate sol-gel derived ceramics using single crystal PbZr0.52Ti0.48O3 cubes
2010-09-01

Piezoceramic materials have attracted much attention for sensing, actuation, structural health monitoring, and energy harvesting applications in the past two decades due to their excellent coupling between energy in the mechanical and electrical domains. Among all piezoceramic materials, lead zirconate titanate (PZT) has been the most broadly studied and implemented, in industrial applications due ...

NASA Astrophysics Data System (ADS)

79
Enhanced piezoelectric properties of lead zirconate titanate (PZT) sol-gel derived ceramics using single crystal PZT cubes
2010-03-01

Piezoceramic materials have attracted much attention for sensing, actuation, structural health monitoring and energy harvesting applications in the past two decades due to their excellent coupling between energy in the mechanical and electrical domains. Among all piezoceramic materials, lead zirconate titanate (PZT) has been the most broadly studied and implemented, in industrial applications due ...

NASA Astrophysics Data System (ADS)

80
Synthesis of Sol-Gel Matrices for Encapsulation of Enzymes Using an Aqueous Route
1998-11-23

Sol-gel matrices are promising host materials for potential chemical and biosensor applications. Previous studies have focused on modified sol-gel routes using alkoxides for encapsulation of enzymes. However the formation of alcohol as a byproduct during hydrolysis and condensation reactions poses limitations. We report the immobilization of glucose ...

DOE Information Bridge

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81
Sol gel derived Y(PO3)3 polyphosphate: Synthesis and characterization
2006-05-01

The yttrium polyphosphate Y(PO3)3 has been synthesized by an all-alkoxide sol gel route and characterized by X-ray diffraction and IR spectroscopy. The spectroscopic properties of 5% Eu3+ doped samples prepared by the sol gel process were investigated under site-selective laser excitation in the 5D0 and 5D2 levels ...

NASA Astrophysics Data System (ADS)

82
Nanostructured energetic materials derived from sol-gel chemistry
2000-03-15

Initiation and detonation properties are dramatically affected by an energetic material's microstructural properties. Sol-gel chemistry allows intimacy of mixing to be controlled and dramatically improved over existing methodologies. One material goal is to create very high power energetic materials which also have high energy densities. Using ...

DOE Information Bridge

83
Bioactive materials for biomedical applications using sol-gel technology.
2008-08-08

This review paper focuses on the sol-gel technology that has been applied in many of the potential research areas and highlights the importance of sol-gel technology for preparing bioactive materials for biomedical applications. The versatility of sol-gel chemistry enables us to manipulate the characteristics of material required for particular applications. Sol-gel ...

PubMed

84
Synthesis of vanadium dioxide thin films from vanadium alkoxides
1994-05-01

A very simple sol-gel route to vanadium dioxide thin films is described. Vanadium alkoxide molecular precursors are deposited onto a fused silica substrate by the spin coating technique. An amorphous thin film is obtained at room temperature which leads to crystalline VO[sub 2] when heated at 450 C under a reducing atmosphere (Ar-H[sub 2]). Sol-gel ...

Energy Citations Database

85
Sol-gel-derived AR coatings for solar receivers
1984-09-01

This report details a process for applying sol-gel antireflection (AR) coatings to solar receiver envelopes. The process consists of applying a porous film which is subsequently etched to achieve the optimum AR effect. The result is a single-layer interference film with a reflectance minimum at 550 nm. The solar transmittance of coated tubes is typically increased to 0.95 to ...

Energy Citations Database

86
Sol-gel-derived AR coatings for solar receivers
1984-09-01

A process for applying sol-gel antireflection (AR) coatings to solar receiver envelopes is investigated. The process consists of applying a porous film which is subsequently etched to achieve the optimum AR effect. The result is a single-layer interference film with a reflectance minimum at 550 nm. The solar transmittance of coated tubes is typically increased to 0.05 to 0.97, ...

NASA Astrophysics Data System (ADS)

87
Sol-gel production of bioactive nanocoatings for medical applications. Part 1: an introduction.
2006-10-01

Coatings offer the possibility of modifying the surface properties of surgical-grade materials to achieve improvements in performance, reliability and biocompatibility. Sol-gel-derived coatings demonstrate promise owing to their relative ease of production, ability to form a physically and chemically pure and uniform coating over complex geometric shapes and potential to ...

PubMed

88
Modified sol-gel coatings for biotechnological applications
2007-12-01

The modified sol-gel derived silica coatings were prepared and characterized. The amino and methyl groups were introduced onto the colloidal silica. The silica coatings with different wettability properties: coloidal silica (water contact angle 17�), polysiloxane (61�), methyl-modified (158� and 46�) coatings samples were tested for CaCo-2 cells ...

NASA Astrophysics Data System (ADS)

89
Green up-conversion emission in Er3+:BaTiO3 sol-gel powders.
2000-10-01

Bright green emissions at 549 and 526 nm have been observed from sol-gel derived Er3+:BaTiO3 powders upon excitations at two near infrared (NIR) wavelengths of 973 and 816 nm. The decay characteristics were measured and studied. It was found that the predominant emission at 549 nm has very different lifetimes upon excitation at 973 and 816 nm, which was ...

PubMed

90
Effects of fabrication and irradiation on the dissolution of (U,Pu)O$sub 2$ reactor fuels
1973-01-01

From American Ceramics Society nuclear division meeting; San Francisco, California, USA (29 Oct 1973). LMFBR-type reactors will be fueled with stainless- steel-clad MFBR fuel cycle are the recovery of uranium and plutonium and the refabrication of the fuel elements in the minimum practicable time at lowest cost. Effect of fabrication method and irradiation conditions on recovery of the ...

DOE Information Bridge

91
Conformal sol-gel coatings on three-dimensional nanostructured templates
2008-01-01

Sol-gel processing techniques, such as spin coating and dip coating, have successfully been utilized over the past several decades to apply conformal coatings on planar substrates; however, controlled film growth on three-dimensional (3-D) nanostructured templates using the sol-gel process remains a significant challenge. Obstacles such as, uncontrolled hydrolyzation and ...

NASA Astrophysics Data System (ADS)

92
This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research

catalyzed with hexamethy- lenetetramine (an amine base) are tested for supercapacitor electrodes's personal copy High performance high-purity sol-gel derived carbon supercapacitors from renewable sources. The supercapacitors made from this synthesis have electric double layer characteristics as desired in some

E-print Network

93
Supercapacitors and Batteries from Sol-Gel Derived Carbon ...
2001-02-07

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DTIC Science & Technology

94
Supercapacitors and Batteries from Sol-Gel Derived Carbon - Metal Oxide Electrodes.
2001-01-01

The duration of this program was 48 months (7 Sept. 96-31 Aug. 00). During this time, significant accomplishments were achieved. Eight refereed research articles are in print; one proceedings volume publication is in print; and four manuscripts are under ...

National Technical Information Service (NTIS)

95
Photochemical Enzyme Co-Factor Regeneration: Towards Continuous Glutamate Monitoring with a Sol-Gel Optical Biosensor.
2002-01-01

Sol-gel encapsulation has recently surfaced as a successful approach to biomolecule immobilization. Proteins, including enzymes, are trapped in the pores of the sol-gel derived glass while retaining their spectroscopic properties and biological activity. ...

National Technical Information Service (NTIS)

96
Micro-ion beam analysis of physico-chemical reactions at the interface between sol-gel derived glass particles in

process was easier since the phosphate ions were only coming from the solution. Samples of gel-glass- logical fluids. The periphery of SiO2-CaO glass particles is coated with a homogeneous cal- cium phosphate at the periphery of SiO2-CaO glass particles. Usually, amorphous calcium phosphates are the first phase

E-print Network

97
Controlled Bioactivity in Zn-doped sol-gel derived SiO2-CaO bioactive glasses

of the early step of the bioactive process by using zinc as a doping element. Indeed, zinc improves and for their biological activity. Several authors have reported the influence of silver to improve the formation of hydroxyapatite13 or for antibacterial properties.14,15 Besides silver, other doping elements, like Mg or Sr

E-print Network

98
Concentration effect on the scintillation properties of Sol-Gel derived LuBO3 doped with Eu3+

Luyer-Urlacher, C. Dujardin, C. Pedrini, J. Mugnier, J. Sol-Gel Sci. Techn., 2003, 26, 957. [6] D. Boyer, G. Bertrand-Chadeyron, R. Mahiou, L. Lou, A. Brioude, J. Mugnier, Opt. Mater., 2001, 16, 21. [7] D

E-print Network

99
Comparisons between surfactant-templated mesoporous and conventional sol-gel-derived CaO-B{sub 2}O{sub 3}-SiO{sub 2} glasses: Compositional, textural and in vitro bioactive properties
2008-04-15

Compositional, textural and in vitro bioactive comparisons between surfactant-templated mesoporous (MCBS) and conventional sol-gel-derived CaO-B{sub 2}O{sub 3}-SiO{sub 2} (CBS) glasses are studied in this paper. CBS glasses are heterogeneous in composition. Due to the heterogeneity, melting boron oxide that formed during the heat treatment will fill in the pores that should ...

Energy Citations Database

100
Collaborative US/UK Research Program in Advanced Silica Macromolecular Micro-Optics.
1990-01-01

The major challenge facing sol-gel processing of advanced optical materials, and in fact the entire field of chemically derived ceramics, is to relate processing variables to final properties. Fundamental studies of sol-gel processing science pursued at G...

National Technical Information Service (NTIS)

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101
Characterization of Sol-Gel derived scintillating LuBO3 films doped with rare earth ions.

] A. Garcia-Murillo, C. Le Luyer-Urlacher, C. Dujardin, C. Pedrini, J. Mugnier, J. Sol-Gel Sci. Techn. [6] D. Boyer, G. Bertrand-Chadeyron, R. Mahiou, L. Lou, A. Brioude, J. Mugnier, Opt. Mater., (2001

E-print Network

102
Ceramic Composite Cutting Tool Insert for Increased Productivity, Ultra High-Speed Machining.
1989-01-01

Eleven different ceramic composites with different compositions were investigated. The thermodynamic compatibility, thermal shock factor, hardness, and mechanical properties of these composites were determined. Two composites, sol-gel derived A12O3-ZrO2-S...

National Technical Information Service (NTIS)

103
BIOGRAPHICAL DATA Dr. Branko N. Popov

Doped Chromium Oxides as Cathode Materials for Secondary Batteries", J. Power Sources, 83 (1999) 121-Metal Oxide Supercapacitors from Sol-Gel Derived Carbon-Ruthenium Xerogels", J. Electrochem. Soc., 146 (1999.N. Popov, "Synthesis and Characterization of Hydrous Ruthenium Oxide-Carbon Supercapacitors", J

E-print Network

104
Sol-Gel Production; Proceedings of the First International ...

... Title : Sol-Gel Production; Proceedings of the First International Conference on Application and Commercialization of Sol-Gel Processing Held in ...

DTIC Science & Technology

105
Sol-Gel Processing of Continuous Mullite Fibers.

... Title : Sol-Gel Processing of Continuous Mullite Fibers. ... Abstract : A sol-gel process was developed to produce continuous mullite fibers. ...

DTIC Science & Technology

106
Sol-Gel Processing of Ceramic Composites.

... Accession Number : ADD254165. Title : Sol-Gel Processing of Ceramic Composites. Descriptive Note : Journal article,. Corporate ...

DTIC Science & Technology

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