Author/Authors :
Lucotti، نويسنده , , A. and Casari، نويسنده , , C.S. and Tommasini، نويسنده , , M. and Li Bassi، نويسنده , , A. and Fazzi، نويسنده , , D. and Russo، نويسنده , , V. and Del Zoppo، نويسنده , , M. and Castiglioni، نويسنده , , C. and Cataldo، نويسنده , , F. and Bottani، نويسنده , , C.E. and Zerbi، نويسنده , , G.، نويسنده ,
Abstract :
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.
