A Direct Experimental Evidence of Collective Electron Resonance Mechanism of Surface Enhanced Infrared Spectroscopy (Seirs) |
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| Authors: | Jin Zhang Jiang Zhao Zhongfan Liu Hulin Li |
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| Affiliation: | 1. Department of Chemistry , Lanzhou University , Lanzhou, 730000, China;2. Center for Intelligent Materials Research (CIMR) , College of Chemistry and Molecular Engineering, Peking University , Beijing, 100871, China |
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| Abstract: | Abstract We report here the preliminary results of the surface enhanced transmission infrared spectra of CH3(CH2)7Azo(CH2)3COOH monolayers on CaF2 substrate which was coated by silver island films with different size and distribution. The larger enhancement of absorbance of v(C=O) in COOH residing between silver island gap and small enhancement of absorbance of vibration mode of COO? located on the silver islands are observed. It give us a direct experimental evidence of the collective electron resonance mechanism of surface enhance infrared spectroscopy (SEIRS), i.e. the decrease of the electromagnetic (EM) coupling reduces the enhancement factor of SEIRS. |
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| Keywords: | Silver Island Films Langmuir-Blodgett Surface Enhanced Infrared Spectroscopy (SEIRS) |
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