High-pressure diamondlike liquid carbon

Laser deposition of diamondlike carbon films at high intensities

Unhydrogenated diamondlike carbon ~DLC! thin films have been deposited by laser ablation of graphite, using a high power Ti: sapphire solid state laser system. DLC films were deposited onto silicon substrates at room temperature with subpicosecond laser pulses, at peak intensities in the 4310– 5310 W/cm range. A variety of techniques, including scanning and transmission electron microscopy ~SEM...

High pressure carbon dioxide pasteurization of liquid food Supercritical carbon dioxide pasteurization of liquid food

Photoconductivity in highly tetrahedral diamondlike amorphous carbon

A photoconductive effect is observed in tetrahedral amorphous carbon (ta-C) or amorphous diamond films with a high proportion of sp3 bonding and a structure analogous to amorphous silicon. The spectral response is shown to peak at around 750400 nm and extend into the near UV region. The maximum photoresponse coincides wit.h the optical absorption edge. The quantum efficiency of 300 nm thick fil...

Frictional Behavior of Diamondlike Carbon Films in Vacuum and under Varying Water Vapor Pressure*

In this study, we investigated the frictional behavior of both hydrogenated and hydrogen-free diamondlike carbon (DLC) films in high vacuum (10 Pa) at room temperature. Water was also introduced into the vacuum chamber to elucidate its effects on DLC film tribology. The hydrogen-free DLC (also referred to as tetrahedral amorphous carbon, or ta-C) was produced by an arc-PVD process, and the high...

High-Pressure Liquid Chromatography

An isocratic reversed-phase high-pressure liquid chromatographic method for the determination of six components of the teicoplanin complex in biological fluid was developed. By using fluorescence detection after precolumn derivatization with fluorescamine, the assay is specific and highly sensitive, with reproducibility studies yielding coefficients of variation ranging from 1.5 to 8.5% (at 5 t...