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dc.contributor.authorYou-Jiang Chen
dc.contributor.authorShi-Gang Sun
dc.contributor.author孙世刚
dc.contributor.authorSheng-Pei Chen
dc.contributor.author陈声培
dc.contributor.authorJun-Tao Li
dc.contributor.author李君涛
dc.contributor.authorHui Gong
dc.date.accessioned2011-12-13T02:14:30Z
dc.date.available2011-12-13T02:14:30Z
dc.date.issued2004-10
dc.identifier.citationLangmuir, 2004, 20 (23): 9920–9925zh_CN
dc.identifier.issn0743-7463
dc.identifier.urihttp://dx.doi.org/doi:10.1021/la048484q
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/11378
dc.description.abstractThin films of different nanostructures on an array of nine Pt microelectrodes were prepared by applying a square wave potential treatment for different times (tau). It has been measured from the cyclic voltammetric studies that the relative surface roughness of the films was increased slightly and reached a maximal value of about 2.5. SEM studies demonstrated that with the increase of tau, the growth of island-shaped Pt crystallites on the films led to the formation of plumelike crystallites that can reach about 2-3.5 mum in length when tau exceeded 70 min. In situ microscope FTIR reflection spectroscopic studies illuminated that CO adsorbed on the array yielded different anomalous IR features. With the increase of tau, the direction of the COL band (linearly bonded CO) was transformed from the negative-going direction (normal IR adsorption) to bipolar (Fano-like spectral line shape) and finally to the positive-going direction (abnormal IR adsorption). The intensity of the COL band was enhanced significantly and a maximal enhancement factor of about 33 was measured when tau was 40 min; the center of the COL band and the Stark tuning rate also showed regular changes. This study demonstrated that specific nanostructures of Pt thin films can be prepared through a square wave potential treatment for different times and revealed the intrinsic relationship between anomalous IR properties and surface nanostructures of the thin films.zh_CN
dc.language.isoenzh_CN
dc.publisherAMER CHEMICAL SOCzh_CN
dc.titleAnomalous IR properties of nanostructured films created by square wave potential on an array of pt microelectrodes: An in situ microscope FTIRS study of CO adsorptionzh_CN
dc.typeArticlezh_CN


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