Materials & Nanoscience

Applications of Ultrasound to Nanoscience (#150)

This symposium will cover recent developments in the chemical effects of ultrasound, with emphasis on applications to nanoscience. The last few years have seen the rapid development of the use of high intensity ultrasound for the production of novel nanomaterials. Acoustic cavitation is primarily responsible for sonochemistry and the production or modification of nanomaterials during ultrasonic irradiation. Cavitation (the formation, growth, and implosive collapse of bubbles in liquids) generates localized, transient, but intense hot spots (~5000 K, ~1000 atm, sub-nsec), which are responsible for much of sonochemistry, and also produces shockwaves in liquids and high speed liquid jets near surfaces, which cause physical modification of solids and surfaces. This symposium will review diverse examples of how the chemical and physical effects of high intensity ultrasound can be exploited for the preparation or modification of a wide range of nanostructured materials. The topics will include: sonochemical synthesis of nanoparticles, exfoliation of layered solids to produce graphene and its heteroatom analogs, modification of surface nanostructure, activation of nanophase heterogeneous catalysts, sonochemical effects on electrode surfaces and electrochemical processes, ultrasonic spray pyrolysis and flow aerosol preparation of nanomaterials, sonoprocessing of a wide range of nanomaterials (including nanotubes, nano-zeolites, nano-MOFs, quantum dots, high temperature superconductors, etc.), nanoparticle impregnation (including composites, fabrics, polymer surfaces, etc.), mechanoluminescence induced in sonicated solids and sonoluminescence of nanomaterials, sonocrystallization and sonofragmentation of molecular crystals, sonogels and ultrasonic gelation, sonochemical preparation of polymer nanospheres and microspheres and their use for theranostics, mechanochemical reactions of polymers induced ultrasonically, and surface modification of polymers
Last update: Dec 28, 2015