15 research outputs found
Cutaneous Papilloma and Squamous Cell Carcinoma Therapy Utilizing Nanosecond Pulsed Electric Fields (nsPEF)
10.1371/journal.pone.0043891PLoS ONE78
Chemical Vapor Deposition of CuOx Films by Cul and O2: Role of Cluster Formation on Film Morphology
Ultrafine aluminum oxide powder prepared by chemical vapor deposition of trimethylaluminum
Methyltrimethoxysilane-based elastic aerogels: Effects of the supercritical medium on structure-sensitive properties
Development, preliminary testing and future applications of a rational correlation for the grain densities of vapour-deposited materials
Comparative analysis of the physicochemical characteristics of SiO2 aerogels prepared by drying under subcritical and supercritical conditions
SiO2-based aerogels have been produced be removing a solvent (ethanol or hexafluoroisopropanol) from lyogels both above and below the critical temperature of the alcohols (in the range 210–260 and 160–220°C, respectively). The resultant materials have been characterized by low-temperature nitrogen adsorption measurements, X-ray diffraction, thermal analysis, scanning electron microscopy, X-ray microanalysis, and small-angle and ultrasmall-angle neutron scattering. The results demonstrate that removing the solvent 20–30°C below the critical temperature of the solvent yields silica that is characterized by higher specific porosity and has the same or a larger specific surface area in comparison with the aerogels produced by drying under supercritical conditions. The nature of the solvent used and the solvent removal temperature influence the size and aggregation behavior of primary clusters and the cluster aggregate size in the aerogels