Showing papers by "Bin Ren published in 2000"
TL;DR: In this paper, the surface-enhanced Raman scattering (SERS) effects were observed from the metal nanowire arrays including Ni, Co metals that were normally considered to be non-SERS active substrates.
Abstract: The two-dimensional arrays of various metal nanowires with diameters ranging from 15 to 70 nm have been fabricated by electrodepositing metals of Cu, Ag, Au, Ni, and Co into the nanoholes of the anodic aluminum oxide (AAO) films, followed by partial removal of the film. The strong surface-enhanced Raman scattering (SERS) effects were observed from the metal nanowire arrays including Ni, Co metals that were normally considered to be non-SERS active substrates. It has been shown that metal nanowire arrays can serve as very good SERS active substrates, especially for transition metals. The SERS intensity of the probe molecule adsorbed at the nanowires depends critically on the length of the nanowires explored at the surface. And the band frequency is very sensitive to the diameter, which reflects the change in the electronic property of metal nanowires. Applying this probe molecule strategy, SERS could develop into a diagnostic tool of metal nanowires (nanorods).
97 citations
TL;DR: In this article, the surface-enhancement factors for various roughened Fe surfaces were calculated to range from two to three orders, critically depending on the roughening procedure.
85 citations
TL;DR: In this article, the in-situ Raman spectroscopic study on methanol electrooxidation on platinum electrodes with various surface roughness has shown the advantage in obtaining the informative spectra during the surface reaction with high faradaic current.
53 citations
TL;DR: The surface Raman study of the electrode potential effect on the adsorption behavior of cyanide on the Pt surface was performed on a confocal microprobe Raman system with the help of a special surface pretreatment for the platinum electrode as mentioned in this paper.
32 citations
TL;DR: In this paper, surface-enhanced Raman spectroscopy has been used as a diagnostic tool of the electronic properties of metal nanorods; the vibrational frequency of the probe molecule SCN− at Cu nanors is shown to critically depend on the nanorod's diameter in the range from 50 to 15 nm.
28 citations
TL;DR: In this article, the unique advantage of confocal microprobe Raman spectroscopy was used to study the aggregation process of tetrakis (p-sulfonatophenyl) porphyrin (TSPP) occurring at the liquid/air interface.
15 citations
TL;DR: In this paper, confocal Raman microscopy was used to investigate the adsorption behavior of thiocyanide ion on Pt and Ni electrode surfaces, and the effects of the anion, concentration and applied potential on the frequency shift of SCN- as a result of the electrochemical Stark effect.
Abstract: Thiocyanide ion adsorption on Pt and Ni electrode surfaces was investigated by confocal Raman microscopy. The effects on the adsorption behavior of SCN - by the electrolyte anion, concentration and applied potential were studied. The potential has a significant effect on the frequency shift of SCN- as a result of the electrochemical Stark effect. The adsorbability of the electrolyte anion has a significant influence on the surface Raman intensity of SCN - ; the intensity follows the order Cl -
11 citations
Journal Article•
TL;DR: The aggregation process of TSPP has been monitored at the liquid/gas interface using Raman spectroscopy, which is shown to have very different behavior compared with that in the bulk.
Abstract: Confocal microprobe Raman spectroscopy has been applied to the study of liquid/gas and solid/liquid interfaces. With the help of the resonance Raman effect, the aggregation process of TSPP has been monitored at the liquid/gas interface using Raman spectroscopy, which is shown to have very different behavior compared with that in the bulk. The solution layer analysis has been performed in the interfacial region above a Pt electrode under reaction, and the solution composition is monitored in situ during the electrochemecial reaction. Taking the advantage of high spatial resolution of the confocal microscope, the surface enhanced Raman imaging has been performed on the electrodeposited gold surface.
1 citations