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Опубликовано 2010-09-08 Опубликовано на SciPeople2010-11-07 02:58:09 ЖурналJournal of Experimental Nanoscience


Synthesis of stable dispersion of Copper nanoparticles in a water-in-supercritical carbon dioxide (sc-CO2) using Polydimethyl siloxane (PDMS) as the stabilizer
I.R. Kamrupi and S.K. dolui / Isha Kamrupi
Аннотация Reported herein is the synthesis of stable dispersion copper nanoparticles by chemical reduction of Copper Chloride (CuCl2) in a water-in supercritical carbon dioxide (sc-CO2) medium using sodiumborohydrate (NaBH4) as reducing agent, polydimethylsiloxane (PDMS) as the stabilizer and Sodium (bis-2ethylhexyl) sulfosuccinate(AOT) as co-surfactant at temperature 40 o C and pressure in the range of 2000 psi-2400psi. UV-visible spectroscopy exhibits a typical emission peak at 560-590 nm for Cu nanoparticles. By changing the reaction pressure and the stabilizer concentration, the size and the shape of the copper nanoparticles could be easily controlled. The X-ray diffraction pattern reveals that the Cu nanoparticles formed in the range of 4-8 nm which are in consistent with the TEM images.
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