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Chemical Separations by Bubble-Assisted Interphase Mass-Transfer

Boyd, David A. and Adleman, James R. and Goodwin, David G. and Psaltis, Demetri (2008) Chemical Separations by Bubble-Assisted Interphase Mass-Transfer. Analytical Chemistry, 80 (7). pp. 2452-2456. ISSN 0003-2700. doi:10.1021/ac702174t.

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We show that when a small amount of heat is added close to a liquid−vapor interface of a captive gas bubble in a microchannel, interphase mass-transfer through the bubble can occur in a controlled manner with only a slight change in the temperature of the fluid. We demonstrate that this method, which we refer to as bubble-assisted interphase mass-transfer (BAIM), can be applied to interphase chemical separations, e.g., simple distillation, without the need for high temperatures, vacuum, or active cooling. Although any source of localized heating could be used, we illustrate BAIM with an all-optical technique that makes use of the plasmon resonance in an array of nanoscale metal structures that are incorporated into the channel to produce localized heating of the fluid when illuminated by a stationary low-power laser.

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Additional Information:© 2008 American Chemical Society. Published on Web March 6, 2008. Received for review October 22, 2007; accepted December 12, 2007. This work has been generously supported by the DARPA Center for Optofluidic Integration by award HR0011-04-1-0032 and by the DARPA CAD-QT program as administered by ONR award N00014-06-1-0454. We thank Carl S. Parker for his assistance with the optical temperature measurements. We also thank George Rossman for the use of equipment and Elizabeth Miura Boyd for technical assistance.
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Defense Advanced Research Projects Agency (DARPA)HR0011-04-1-0032
Office of Naval Research (ONR)N00014-06-1-0454
Issue or Number:7
Record Number:CaltechAUTHORS:20160801-141142224
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Official Citation:Chemical Separations by Bubble-Assisted Interphase Mass-Transfer David A. Boyd, James R. Adleman, David G. Goodwin, and Demetri Psaltis Analytical Chemistry 2008 80 (7), 2452-2456 DOI: 10.1021/ac702174t
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69360
Deposited On:01 Aug 2016 23:23
Last Modified:11 Nov 2021 04:13

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