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Originally published in Science Express on 23 September 2004
Science 15 October 2004:
Vol. 306. no. 5695, pp. 473 - 476
DOI: 10.1126/science.1102074
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Reports

Vibrational Energy Transfer Across a Reverse Micelle Surfactant Layer

John C. Deàk,1* Yoonsoo Pang,2* Timothy D. Sechler,1 Zhaohui Wang,2 Dana D. Dlott2{dagger}

In a suspension of reverse micelles, in which the surfactant sodium dioctyl sulfosuccinate (AOT) separates a water nanodroplet from a bulk nonpolar CCl4 phase, ultrafast vibrational spectroscopy was used to study vibrational energy transfer from the nanodroplet through the AOT interfacial monolayer to the surrounding CCl4. Most of the vibrational energy from the nanodroplet was transferred to the polar AOT head group within 1.8 picoseconds and then out to the CCl4 within 10 picoseconds. Vibrational energy pumped directly into the AOT tail resulted in a slower 20- to 40-picosecond transfer of energy to the CCl4.

1 Department of Chemistry, University of Scranton, Scranton, PA 18510, USA.
2 School of Chemical Sciences, University of Illinois at Urbana-Champaign, Box 01-6 Chemical and Life Sciences Laboratory, 600 South Mathews Avenue, Urbana, IL 61801, USA.



* These authors contributed equally to this work.

{dagger} To whom correspondence should be addressed. E-mail: dlott{at}scs.uiuc.edu

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