Synthesis of hollow metallic particles via ultrasonic treatment of a metal emulsion
Received 4 December 2009; received in revised form 13 January 2010; accepted 14 January 2010. published online 18 January 2010.
We introduce a synthesis method in which liquid metals in an emulsion mix and solidify under the influence of ultrasound radiation. We use it to produce two types of metallic nano- and microparticles. The first group, formed by rapid droplet solidification, is characterized by a nearly perfect spherical shape. The second group consists of hollow particles which were probably formed by near-adiabatic cooling of the metal inside an expanding cavitation bubble.
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