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Single-particle levitation system for automated study of homogeneous solute nucleation

Olsen, Adam P. and Flagan, Richard C. and Kornfield, Julia A. (2006) Single-particle levitation system for automated study of homogeneous solute nucleation. Review of Scientific Instruments, 77 (7). Art. No. 073901. ISSN 0034-6748.

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We present an instrument that addresses two critical requirements for quantitative measurements of the homogeneous crystal nucleation rate in supersaturated aqueous solution. First, the need to perform repeated measurements of nucleation incubation times is met by automating experiments to enable programmable cycling of thermodynamic conditions. Second, the need for precise and robust control of the chemical potential in supersaturated aqueous solution is met by implementing a novel technique for regulating relative humidity. The apparatus levitates and weighs micron-sized samples in an electric field, providing access to highly supersaturated states. We report repeated observations of the crystal nucleation incubation time in a supersaturated aqueous sodium chloride droplet, from which we infer the nucleation rate.

Item Type:Article
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URLURL TypeDescription
Flagan, Richard C.0000-0001-5690-770X
Kornfield, Julia A.0000-0001-6746-8634
Additional Information:©2006 American Institute of Physics (Received 3 April 2006; accepted 13 May 2006; published online 5 July 2006) This work was funded by the National Science Foundation (DMR-0505393 and the MRSEC Program under award DMR-0080065). The authors would also like to thank Professor Gary Lorden of Caltech for discussions regarding statistical analysis, and Professor Bill Bridges of Caltech for assistance in designing the optics for collection of Mie scattering.
Subject Keywords:electrostatic devices; nucleation; crystal growth from solution; humidity; chemical potential; humidity control; automation
Issue or Number:7
Record Number:CaltechAUTHORS:OLSrsi06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4675
Deposited By: Archive Administrator
Deposited On:02 Sep 2006
Last Modified:02 Oct 2019 23:15

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