Results 171 to 180 of about 11,364 (217)
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Magnetic and Porous Nanospheres from Ultrasonic Spray Pyrolysis
Journal of the American Chemical Society, 2005We have used an inexpensive high-frequency ultrasound generator from a household humidifier to create a useful source for ultrasonic spray pyrolysis and produced submicrometer silica particles that are porous on the nanometer scale. By using two heated zones, we first initiate polymerization of organic monomers in the presence of silica colloid, which ...
Won Hyuk, Suh, Kenneth S, Suslick
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Porous Carbon Powders Prepared by Ultrasonic Spray Pyrolysis
Journal of the American Chemical Society, 2006New, thermally robust meso- and macroporous carbon powders were prepared by ultrasonic spray pyrolysis (USP) of aqueous solutions using an inexpensive high-frequency ultrasound generator from a household humidifier. We choose our molecular precursors rationally, so that the expected decomposition pathways produce only remnant carbon atoms. Specifically,
Sara E, Skrabalak, Kenneth S, Suslick
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Air-assisted ultrasonic spray pyrolysis for nanoparticles synthesis
SPIE Proceedings, 2002This paper presents new findings regarding the effects of precursor drop size and concentration on product particle size and morphology in ultrasonic spray pyrolysis of zirconium hydroxyl acetate solutions. Large precursor drops (diameter >30μm) generated by ultrasonic atomization at 120kHz yielded particles with holes.
Shirley C. Tsai +4 more
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Hydroxyapatite coatings by pulsed ultrasonic spray pyrolysis
Ceramics International, 2008Hydroxyapatite coatings on 316L stainless steel substrates were prepared using ultrasonic spray deposition with substrate temperature kept at 300 °C. Two spray patterns, continuous and pulsed (intermittent), were used coupled with precisely control of substrate movement.
G. Ye, T. Troczynski
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Nanostructured Carbons Prepared by Ultrasonic Spray Pyrolysis
Chemistry of Materials, 2010Porous carbon powders were prepared by ultrasonic spray pyrolysis of solutions of sucrose and sodium carbonate or bicarbonate. The decomposition of the carbonate salt evolves gases that create porosity in the carbon material without sacrificial templating agents. Microporous particles with a macroporous or hollow interior have been produced.
Maria E. Fortunato +2 more
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Anatase thin films by ultrasonic spray pyrolysis
Journal of Analytical and Applied Pyrolysis, 2010Abstract TiO 2 thin films were deposited on glass slides using ultrasonic spray pyrolysis at 400 °C for times in the range 30–120 min. All of the films consisted of fully dense polycrystalline anatase. The first-order growth kinetics were determined to be 11 nm/min, which is similar to those of other thin-film fabrication methods.
A. Nakaruk, D. Ragazzon, C.C. Sorrell
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Cytotoxicity of Gold Nanoparticles Prepared by Ultrasonic Spray Pyrolysis
Journal of Biomaterials Applications, 2010The aim of this work was to study the cytotoxicity of different fractions of gold nanoparticles prepared by ultrasonic spray pyrolysis from gold scrap. The target cells were rat thymocytes, as a type of nonproliferating cells, and L929 mouse fibroblasts, as a type of continuous proliferating cells.
R, Rudolf +5 more
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Cu2ZnSnS4 thin films deposition by ultrasonic spray pyrolysis
Journal of Alloys and Compounds, 2012Abstract Cu 2 ZnSnS 4 (CZTS) thin films were deposited by ultrasonic spray pyrolysis technique. The substrate temperature was varied from 280 to 360 °C in order to investigate its influence on CZTS films properties. The deposition rate shows two activation energies 0.16 and 0.53 eV, respectively at low and high substrate temperatures. This indicates
W. Daranfed +4 more
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YAG:Ce phosphor particles prepared by ultrasonic spray pyrolysis
Materials Research Bulletin, 2000Abstract Spray pyrolysis was applied to the preparation of fine YAG:Ce phosphor particles. The characteristics of particles such as crystallinity, morphology, and photoluminescence were investigated. Phase-pure YAG:Ce particles with high crystallinity were obtained after annealing at lower temperatures than those of conventional preparation processes.
Kang, YC +3 more
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Nanostructured phosphorous tungsten bronzes from ultrasonic spray pyrolysis
Solid State Ionics, 2005Abstract Ultrasonic spray pyrolysis has been used to obtain fine spherical powders of WPA bronzes from a 29-tungstenphosphoric acid (WPA-29) feed solution. The average grain size of the obtained powder particles is ca. 1000 nm; these consist of subparticles in the 30–80 nm range.
Jokanović, Vukoman R. +2 more
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