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Surface Enhanced Raman Spectroscopy Of AgTCNQ Formed From Ag Micellar And Inverse Micellar Colloidal Systems

Published online by Cambridge University Press:  10 February 2011

Ivan W. Ong ,
Dwaine O. Cowan  and
Theodore O. Poehler
Ivan W. Ong
Affiliation:
Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, MD 21218
Dwaine O. Cowan
Affiliation:
Department of Chemistry, The Johns Hopkins University, Baltimore, MD 21218
Theodore O. Poehler
Affiliation:
Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, MD 21218
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Abstract

Silver Tetracyanoquinodimethane (AgTCNQ) is an organometallic semiconductingcompound with potential for use as an optical memory storage media due to its ability to exist intwo states. A laser Raman system has been proposed for this application as the two states havedistinct Raman vibrational peaks. However, the Raman spectra of bulk AgTCNQ films is veryweak and requires special measures to prevent laser-induced degradation and to ensure adequatesignal to noise ratios. In this paper, we report a synthesis AgTCNQ consisting of AgTCNQnanolayers grown around silver colloidal particles in both water and heptane with the use of theamphiphilic surfactants, AOT and SDS. The Raman scattering of such AgTCNQ systems hasbeen found to be strongly enhanced and far superior to that obtained on bulk AgTCNQ films.We believe that such a system represents a novel and advantageous way of detecting theswitching behavior of AgTCNQ (and other metal-TCNQ compounds) by laser, as Ramanresearch on metal-TCNQ systems has been stymied in the past by poor Raman signals andsusceptibility to laser-induced degradation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 413: Symposium W – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials III , 1995 , 601
Copyright
Copyright © Materials Research Society 1996

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References

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