| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9577704 | Chemical Physics Letters | 2005 | 6 Pages |
Abstract
Au core Pd shell (Au@Pd) nanoparticles with controllable size from 35 to 100Â nm were prepared by chemical deposition of Pd over pre-formed 12Â nm Au seeds. Both transmission electron microscopy and UV-visible spectroscopy studies confirmed the core-shell structure of the synthesized nanoparticles. The Au@Pd nanoparticles dispersed on a polished Pt electrode surface exhibit high surface-enhanced Raman scattering (SERS) effect for the adsorbed pyridine and SCNâ. With the aid of the long-range effect of the electromagnetic (EM) enhancement created by the SERS-active Au core underneath the Pd shell, the good quality SERS spectra of adsorbates on the palladium metal overlayer can be obtained. Such kind of SERS-active substrate can be used as an alternative substrate to massive metals for investigating adsorption and reactions occurring on the Pd metal catalyst.
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Authors
Jia-Wen Hu, Yong Zhang, Jian-Feng Li, Zheng Liu, Bin Ren, Shi-Gang Sun, Zhong-Qun Tian, Tim Lian,