Ultrasound-Assisted Fusion of Preformed Gold Nanoparticles

摘要: The influence of ultrasound waves (20 kHz) high intensity (40 W·cm−2) on preformed citrate-protected gold nanoparticles (average diameter 25 ± 7 nm) is demonstrated in pure water and the presence surfactants. Ultrasonic treatment for 20 min sufficient to fuse at contact a dumbbell-like structure. Gold acquire worm-like or ring-like structure after 60 sonication water. Fused with spherical oval shapes are formed ultrasonic sodium dodecyl sulfate amine solutions. Dispersion found as an additional process during sonication, which weakest crystalline face centered cubic ultrasonically treated defected by ultrasound. reported results could be interest melting inorganic materials nanoscale produce metal structures different morphologies properties.