Sonochemical Synthesis of Gold Nanoparticles by Using High Intensity Focused Ultrasound
Nor Saadah Mohd Yusof, Muthupandian Ashokkumar
CHEMPHYSCHEM | WILEY-V C H VERLAG GMBH | Published : 2015
The sonochemical synthesis of gold nanoparticles (GNPs) with different shapes and size distributions by using high-intensity focused ultrasound (HIFU) operating at 463 kHz is reported. GNP formation proceeds through the reduction of Au(3+) to Au(0) by radicals generated by acoustic cavitation. TEM images reveal that GNPs show irregular shapes at 30 W, are primarily icosahedral at 50 W and form a significant amount of nanorods at 70 W. The size of GNPs decreases with increasing acoustic power with a narrower size distribution. Sonochemiluminescence images help in the understanding of the effect of HIFU in controlling the size and shapes of GNPs. The number of radicals that form and the mechan..View full abstract
N.S.M.Y. acknowledges the University of Malaya for the award of Bright Sparks-SLAI scholarships and grant UM.C/HIR/MOHE/sc/07. We acknowledge Dr. Eric Hanssen and Dr. Meifang Zhou for the TEM images.