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Indexed by:期刊论文

Date of Publication:2009-10-01

Journal:SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

Included Journals:SCIE、EI、Scopus

Volume:74

Issue:2

Page Number:509-514

ISSN No.:1386-1425

Key Words:Self-assembled dynamics; Silver nanoparticles; 1,4-Benzenedithiol; SERS; S-S stretching band; Multilayers

Abstract:Self-assembled dynamics of silver nanoparticles and self-assembled dynamics of 1,4-benzenedithiol (1,4-BDT) adsorbed on silver nanoparticles were investigated experimentally with surface-enhanced Raman scattering (SERS) and theoretically with density functional theory (DFT) and finite difference time domain (FDTD) method. The absorption spectroscopy of 1,4-BDT in silver sol at different time intervals was measured, which give the indirect evidence of self-assembled dynamics of silver nanoparticles and self-assembled dynamics of 1,4-benzenedithiol (1,4-BDT) adsorbed on silver nanoparticles. To obtain the direct evidence of self-assembled dynamics of silver nanoparticles and self-assembled dynamics of 1,4-benzenedithiol (1,4-BDT) adsorbed on silver nanoparticles, the SERS of 1,4-BDT were measured experimentally and investigated theoretically. The appearances of S-S stretching band (revealing the formation of multilayers of 1,4-BDT), and strongly enhanced S-C stretching, C-C ring stretching vibrational modes clearly show self-assembled dynamics of 1,4-BDT. (C) 2009 Elsevier B.V. All rights reserved.