Investigation of sp carbon chain interaction with silver nanoparticles by Surface Enhanced Raman Scattering

Details Investigation of sp carbon chain interaction with silver nanoparticles by Surface Enhanced Raman Scattering Investigation of sp carbon chain interaction with silver nanoparticles by Surface Enhanced Raman Scattering

2008-03-28

arxiv.org/abs/0803.4075v2

Chemical Physics Letters 478 (2009) 45-50

Physics

Condensed Matter

Materials Science

19 pages, 7 figures, 1 tables

Scientific paper

10.1016/j.cplett.2009.06.030

Surface Enhanced Raman Spectroscopy (SERS) is exploited here to investigate the interaction of isolated sp carbon chains (polyynes) in a methanol solution with silver nanoparticles. Hydrogen-terminated polyynes show a strong interaction with silver colloids used as the SERS active medium revealing a chemical SERS effect. SERS spectra after mixing polyynes with silver colloids show a noticeable time evolution. Experimental results, supported by density functional theory (DFT) calculations of the Raman modes, allow us to investigate the behavior and stability of polyynes of different lengths and the overall sp conversion towards sp2 phase.

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