Hydrogenated diamond-like-carbon (a-C:H) and hydrogen-free amorphous carbon (a-C) coatings are known to be biocompatible and have good chemical inertness. For this reason, both of these materials are strong candidates to be used as a matrix that embeds metallic elements with antimicrobial effect. In this comparative study, we have ...

... of Squirb and Young developed �in England in 1937. Acompar~son of the conditions associated with tran- sition in this investigation and. ...

Hydrogenated diamond-like-carbon (a-C:H) and hydrogen-free amorphous carbon (a-C) coatings are known to be biocompatible and have good chemical inertness. For this reason, both of these materials are strong candidates to be used as a matrix that embeds me...

Selective solar thermal collectors were prepared by plasma enhanced deposition of pure amorphous hydrogenated carbon (a-C:H) films on aluminium substrates. By only varying the bias voltage in the DC PECVD system coatings were fabricated composed of five sublayers with graded optical properties. An absorption spectrum well matched to the solar spectrum was ...

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To measure the effect of coating materials on smoke yield of wood, Douglas-fir plywood of exterior grade A-C quality finished with 14 coating systems was subjected to fire exposure in a chamber similar to that used in a method proposed by the National Bur...

larger than the coat per watt of the photovoltaic modules. Since A.C. systems are more complicated, the BOB coot for A.C. systems similar in size ...

igneous rocks whose fresh color is masked by a thin limonitic coating from the oxidation of thin film

We introduce a new genosensing approach employing CTAB (cetyltrimethylammonium bromide)-coated positively charged colloidal gold nanoparticles (GNPs) to detect target DNA sequences by using absorption spectroscopy and dynamic light scattering. The approach is compared with a previously reported method employing unmodified CTAB-coated gold nanorods (GNRs). ...

We report on the characterization of microstructure and mechanical properties of sputter deposited Ti-containing amorphous carbon (Ti-aC) coatings as a function of Ti composition. Ti-aC coatings have been deposited by unbalanced magnetron sputter deposition, in an industrial-scale four-target ...

A new coating combination to obtain low wear, a low and stable friction coefficient in a vacuum and dry air, as well as in humid air is proposed. The main properties of MoS2, TiC, amorphous carbon a-C:H, and diamond like carbon coatings are summarized. Ex...

B.V. All rights reserved. doi:10.1016/j.surfcoat.2003.10.018 Oxygen transport by gas permeation through the zirconia layer in plasma sprayed thermal barrier coatings A.C. Fox, T.W. Clyne* Department room temperature and 600 8C. Maximum oxygen fluxes through the top coat via gas permeation, estimated

-phase ( , ) NiCrAlY bond coat with an EB-PVD TBC, a different TGO-based failure mechanism applies [10 pegs in thermal barrier systems with NiCoCrAlY bond coats H.X. Zhua, N.A. Flecka,, A.C.F. Cocksb, AAlY bond coats is accompanied by non-uniform thickening of the thermally grown oxide (TGO

?;?A?c(*KyRA?c(?%* A?c()Z?HA?c(?J?@A?c)R$?A?c)YZf?A?c)`Js.A?c* c$ ZA?c*V_?eA?c*?Ia*A?c+?#?VA?c+?_?Y@_?A?c+?Ia*A?c,?#*?A?c ...

Micropipette electrodes are fabricated by coating glass micropipettes first with metal and then with hydrogenated amorphous carbon (a-C:H) as an electrical insulator. Furthermore, at the tip of the micropipette electrode, the deposited a-C:H film needs to be removed to expose the metal-coated surface and hollow for ...

A systematic study on the influence of relative abundance of isotopes of elements in the coating (A(c)) and in the substrate (A(s)) on both shape of time-resolved signals and depth resolution (Delta z) was performed for depth profile analysis of metal coatings on metal substrates by ultraviolet (266 nm) nanosecond laser ablation ...

and conformal hafnium diboride (HfB2) thin films were obtained by CVD from the precursor Hf[BH4]4 at deposition resistant thin films and decorative coatings. Hafnium diboride (HfB2) has a melting temperature of 3250 �C is unreactive. The nitrogen replaces boron in the film but the hafnium content is almost unchanged. The oxygen

Hydrogenated amorphous carbon films (a-C:H) were deposited on glass, silicon and germanium substrates. The films are transparent in the IR and are extremely hard. The a-C:H films were homogeneously deposited at a rate of about 500 A/min in an RF excited d...

� reusable & disposable cages, clippers, shipping containers, etc. Feed & Bedding � fruits, vegetables, hardwood chips, etc. (NIH Only) Note: No animals 5420 Occupational Clothing & Safety Supplies Clothing (jump suits, scrub suits, lab coats, etc.), gloves (vinyl, cotton, asbestos, etc.), Footwear (sneakers

A requiremcnt often encountered in electron tube developmental work is the joining of copper to stainless steel. The usual methods of pcrforming such brazes require that a protective nickel coating first be applied to the stain equent brazing operation be carried out in dry hydrogen. An alternative method not requiring hydrogen, prior to nickel plating, or ...

In this study, a-C:Ti x% coatings with various levels of Ti addition are deposited on cemented tungsten carbide (WC-Co) substrates using a medium-frequency twin magnetron sputtering and unbalanced magnetron sputtering system. This study investigates the tribological properties of the coatings by conducting wear tests against an AISI ...

Metal-free amorphous hydrocarbon (a-C:H) and Ti-containing hydrocarbon (Ti-C:H) coatings have been synthesized in a hybrid chemical vapor deposition (CVD)/physical vapor deposition (PVD) system which combines inductively coupled plasma (ICP) and sputter deposition. a-C:H coatings have been fabricated by ICP ...

The formation of chromium carbide-based hard-coatings on steels using a 90�-bend filtered cathodic vacuum arc (FCVA) has extensive industrial applications; such coatings are free of macroparticles and exhibit excellent characteristics. In this investigation, a working pressure of C2H2/Ar was adopted to synthesize amorphous chromium carbide film ...

Titanium and hydroxyapatite (HA) are widely used as biomaterials for dental and medical applications. HA-coated titanium implants have excellent biocompatibility and mechanical properties. However, the adherence of HA film formed on titanium substrate is weak because of the lack of chemical interaction between HA and titanium. A solution to this problem is to form an ...

The drive for greater efficiency in propulsion and industrial/power production machinery has pushed metallurgy to develop ever better alloys and taken existing metallic components to their reliability threshold. Nowhere is that better illustrated than in turbine engine materials. The nickel-based superalloys currently in use for the most demanding areas of the engines melt at 1230-1315 ...

We have explored the adhesive interlayer structure for a tungsten carbide reinforced amorphous hydrocarbon thin film coating (WC/a-C:H) that demonstrated excellent coating adhesion under highly stressed tribological contact. Transmission electron microscopy (TEM) analysis including cross-sectional imaging, electron diffraction, and ...

TiC/a-C:H coatings were deposited using closed-field unbalanced reactive magnetron sputtering deposition from Ti targets. Different acetylene gas flow and substrate bias values were employed to vary the coatings' compositions and microstructures. The application of an external negative substrate bias increased the deposition ...

The pristine state and soft X-ray induced decomposition of two aromatic amino acids, viz. phenylalanine and tyrosine, have been studied by means of XPS and NEXAFS. The spectroscopic data on the radiation decomposition have been supplemented by a mass-spectral analysis of desorbed species in the residual gas. Despite very similar chemical structures, the two amino acids show a drastically different ...

Amorphous carbon coatings (a-C, a-C:H) of less than 100 nm thick were deposited on KBr pellets and silicon wafer substrate via magnetron sputtering of graphic target in argon, argon/hydrogen and argon/nitrogen atmosphere. Parallel electron energy loss spectroscopy (PEELS) analysis was used to quantify the sp{sup 2}/sp{sup 3} bonding in ...

Hydrogenerated amorphous carbon (a-C:H) films can improve oxygen gas barrier characteristics of plastic food containers, by coating it on the surfaces of such containers, and is intended to enhance the preservative quality. However, it has a problem that the degradation of optical transparency in the visible light range blocks the view of the inner ...

In this study, we have successfully used the extended X-ray absorption fine structure (EXAFS) technique at the Ti-K edge to extract the local structure in a set of nanocomposite TiBC/a-C coatings deposited by a combined d.c.-pulsed and r.f.-magnetron sputtering deposition process. The sequence of Fourier transform spectra in the deposited films shows that ...

A novel trifluoroethoxy (TFEO)-coated SubPc (1) and various axially functionalised derivatives thereof (2) have been efficiently synthesised. The advantage of the TFEO-coating on SubPcs compared to conventional fluorine-coated or uncoated molecules has been clearly demonstrated, as axial derivatisation has been realised in very good ...

Hermetically coated graded-index silica fibers were to exhibit proof-test levels greater than 200 Kpsi over one kilometer length. Fiber was to exhibit a stress-corrosion factor N greater than 100. The dielectric coating materials were to include, but not limited to diamond-like carbon and boron nitride. Techniques using hollow-cathode discharge coater ...

Composite coatings made of nanocrystalline TiC (nc-TiC) particles and amorphous carbon (a-C) have been prepared in a double magnetron sputtering system using graphite and titanium targets under Ar bombardment. Chemical composition and microstructure of coatings were studied by transmission electron microscopy (TEM), electron energy ...

White coat colour in horses is inherited as a monogenic autosomal dominant trait showing a variable expression of coat depigmentation. Mutations in the KIT gene have previously been shown to cause white coat colour phenotypes in pigs, mice and humans. We recently also demonstrated that four independent mutations in the equine KIT gene ...

Using the techniques of reactive magnetron sputter deposition and inductively coupled plasma (ICP) assisted hybrid physical vapor deposition (PVD)/chemical vapor deposition (CVD), we have synthesized a wide variety of metal-free amorphous hydrocarbon (a-C:H) and Ti-containing hydrocarbon (Ti-C:H) coatings. Coating elastic modulus and ...

The ultimate goal of this dissertation research is to enhance the protein resistant nature of poly(ethylene oxide) (PEO) or poly(ethylene glycol) by introduction of a siloxane linker and to subsequently prepare coatings which prevent surface-induced thrombosis. The hydrophobicity and flexibility of the siloxane tether should impart both amphiphilicity and conformational ...

The qualities of freestanding single-walled carbon nanotubes (SWCNTs) grown on Co/Si(100) in the gravity-assisted chemical vapour deposition (CVD) process have been investigated. Vertically oriented SWCNTs of high quality appear at a growth time of less than 3 min, verified by the clear radial breathing mode (RBM) in the Raman spectra and by the high resolution images taken by a transmission ...

Compacts of boron powder, suitable for zone melting, were prepared by using boron trioxide as a binder. The powdered crystalline boron was coated by immersing in a boiling aqueous solution of boric acid and evaporating to dryness. A prepared powder compact had satisfactory strength for handling and mounting in a fioating zone melting apparatus. The melted zone, ...

Molecular dynamics computer simulations of the growth processes and microstructural properties of amorphous carbon (a:C) and amorphous hydrogenated carbon (a:CH) ultra-thin films have been performed. Films 1 to 10 nm thick were grown on a diamond (100) surface using Brenner`s bond-order potential for hydrocarbons. The stoichiometry, radial distribution function, chemical ...

An apparatus for inducing an electric discharge in a gas at low pressure to form a stable, unsoiled plasma is de signed comprising (1) a torotdal tube whose outside surface is completely coated with a sheet of conducting material except for insulated gaps, (2) inductor windings wrapped around the tube with the turn plane parallel to the center line of the chamber and ...

A device of sufficiently low density so that it could be ieft in the beam for continuous monitoring by the Cosmotron operators is described. The device is an 8-in.-diam. ionization chamber with Mylar walls. One wall is coated with Al and the other has a silk-screened silver mosaic of 64 spots. In the control room 64 bulbs are arranged in an array corresponding in ...

The relevance of active microsystems continually increases and with the expansion of applications also aspects of reliability and durability of the moving microparts. In particular, the microtribological improvement of active MEMS therefore was investigated and improved. On the one hand, the influence of different thin films was investigated; on the other hand, improvement by micropatterning of ...