標題: Detection of Metal-Molecule-Metal Junction Formation by Surface Enhanced Raman Spectroscopy
作者: Wattanavichean, Nungnit
Gilby, Matthew
Nichols, Richard J.
Arnolds, Heike
應用化學系
Department of Applied Chemistry
公開日期: 19-Feb-2019
摘要: Vibrational modes play a key role in characterizing metal-molecule-metal junctions, but their detection currently either requires single-molecule sensitivity or the generation of defect-free large-scale junctions. Here we demonstrate that surface-enhanced Raman scattering (SERS) on nonideal surfaces can provide a significant amount of information despite many defects in the layer. We determine the vibrational signature of the molecular electronic junction for palladium ions complexed and reduced on 4-mercaptopyridine adsorbed on rough gold and gold nanoparticles using SERS and density functional theory. We show that these nonideal surfaces can be used to probe kinetics of metal ion complexation and establish the success of electrochemical metallization. SERS on nonideal surfaces is thus revealed as a useful tool to rapidly establish the key process parameters in making molecular electronic junctions before embarking on more detailed studies on single molecules or single crystal surfaces.
URI: http://dx.doi.org/10.1021/acs.analchem.8b03576
http://hdl.handle.net/11536/148918
ISSN: 0003-2700
DOI: 10.1021/acs.analchem.8b03576
期刊: ANALYTICAL CHEMISTRY
Volume: 91
起始頁: 2644
結束頁: 2651
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