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Light-mediated growth of chalcogenide nanostructures

Sadtler, Bryce and Burgos, Stanley P. and Atwater, Harry A. and Lewis, Nathan S. (2012) Light-mediated growth of chalcogenide nanostructures. In: 244th ACS National Meeting & Exposition, August 19-23, 2012, Philadelphia, PA. http://resolver.caltech.edu/CaltechAUTHORS:20120822-080735000

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Abstract

The synthesis of inorg. materials whose morphologies respond to changing illumination conditions can enable the development of complex nanostructures with tailored optical responses. We have developed a method for light-mediated pattern formation during the electrodeposition of photoresponsive selenium-tellurium (Se-Te) alloys. While no long-range structure is obsd. for Se-Te films prepd. in the dark, those deposited under illumination display a nanoscale lamellar pattern that is continuous over the entire growth substrate. We attribute the light-induced pattern formation to interference between scattered waves at the surface of the growing film, which produces a periodic modulation in the light intensity. The deposition rate of the Se-Te alloy is increased in regions of greater local intensity making the resulting patterns highly sensitive to the wavelength, polarization, and angle of the incident illumination. Further structural complexity can be built into the Se-Te nanostructures by changing the illumination conditions during the electrodeposition process.


Item Type:Conference or Workshop Item (Paper)
Record Number:CaltechAUTHORS:20120822-080735000
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120822-080735000
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33434
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:27 Aug 2012 23:05
Last Modified:27 Aug 2012 23:05

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