Surface enhanced Raman scattering by organic and inorganic semiconductors formed on laterally ordered arrays of Au nanoclusters

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• 作者：Alex ; er G. Milekhin ; Nikolay A. Yeryukov ; Larisa L. Sveshnikova ; Tatyana A. Duda ; Ekaterina E. Rodyakina ; Evgeniya S. Sheremet ; Michael Ludemann ; Ovidiu D. Gordan ; Alex ; er V. Latyshev ; Dietrich R.T. Zahn
• 关键词：Surface enhanced Raman scattering ; Phonons ; Localized surface plasmon ; Nanocrystals ; Nanoclusters
• 刊名：Thin Solid Films
• 出版年：2013
• 出版时间：30 September, 2013
• 年：2013
• 卷：543
• 期：Complete
• 页码：35-40
• 全文大小：981 K

文摘

This work is devoted to the investigation of surface-enhanced Raman scattering by vibrational modes of cobalt phthalocyanine ultrathin films and CuS nanocrystals prepared using by organic molecular beam vapor deposition and the Langmuir-Blodgett technique, respectively, on laterally ordered arrays of Au nanoclusters formed by electron beam lithography on Si and GaAs substrates.

The surface-enhanced Raman scattering study of cobalt phthalocyanine films demonstrates the strong dependence of Raman intensity of vibrational modes in cobalt phthalocyanine on the laser excitation wavelength as well as on the size and period of Au nanoclusters. By tuning the optical resonance conditions a maximal enhancement factor of 2 ¡Á 10⁴ is achieved. The investigation of surface-enhanced Raman scattering by cobalt phthalocyanine deposited on laterally ordered arrays of paired Au nanoclusters (dimers) reveals anisotropic enhancement with respect to polarization of the scattered light parallel or perpendicular to the dimer axis.