화학공학소재연구정보센터
Chemical Physics Letters, Vol.631, 12-15, 2015
Surface-enhanced Raman scattering investigations of C2nH2 (n=4-6) in as-prepared and dried Ag colloid
Size-separated polyynes (C2nH2 with n = 4-6) are investigated by surface-enhanced Raman scattering (SERS) spectroscopy in Ag colloid and dried Ag colloid. The characterized features of polyynes change significantly, both of the intensity and position, after the mixture of polyyne and Ag colloid runs dry. The interaction between sp chains and Ag nanoparticles used as a SERS active medium is considered. There may be a progress of Ag-C-8-H mode turning to Ag-C-8-Ag mode. Furthermore, an inference is proposed that the C-10 and C-12 chains transform to shorter ones. (C) 2015 Elsevier B.V. All rights reserved.