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

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.

19 pages, 7 figures, 1 tables

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• Cluster Beam Deposition and in situ Characterization of Carbyne-rich Carbon Films
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Cited by in corpus (7)

• Carbyne: from the elusive allotrope to stable carbon atom wires
• Semiconductor-to-metal transition in carbon-atom wires driven by sp2 conjugated endgroups
• Carbon-atom wires produced by nanosecond pulsed laser deposition in a background gas
• Solvent-dependent termination, size and stability in polyynes synthesis by laser ablation in liquids
• Synthesis And Characterization Of Polyynes End-Capped By Biphenyl Groups ({\Alpha},Ω-Biphenylpolyynes)
• Size-selected polyynes synthesized by submerged arc discharge in water
• In situ surface-enhanced Raman spectroscopy to investigate polyyne formation during pulsed laser ablation in liquid