The spectroscopy and chemical dynamics of microparticles explored using an ultrasonic trap

Mason, N. J.; Dawes, A.; Drage, E. A.; Webb, S. M.; McPheat, R. and Hayes, G. (2008). The spectroscopy and chemical dynamics of microparticles explored using an ultrasonic trap. Faraday Discussions, 137 pp. 367–376.

DOI: https://doi.org/10.1039/b702726p

Abstract

Microsized particles play an important role in many diverse areas of science and technology, for example, surface reactions of micron-sized particles play a key role in astrochemistry, plasma reactors and atmospheric chemistry. To date much of our knowledge of such surface chemistry is derived from traditional surface science-based research. However, the large surface area and morphology of surface material commonly used in such surface science techniques may not necessarily mimic that on the surface of micron/nano scale particles. Hence, a new generation of experiments in which the spectroscopy (e.g., albedo) and chemical reactivity of micron-sized particles can be studied directly must be developed. One, as yet underexploited, non-invasive technique is the use of ultrasonic levitation. In this article, we describe the operation of an ultrasonic trap to store and study the physical and chemical properties of microparticles

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