Surface-enhanced Raman scattering of amorphous TiO2 thin films by gold nanostructures: Revealing first layer effect with thickness variation
Surface-enhanced Raman scattering of amorphous TiO2 thin films by gold nanostructures: Revealing first layer effect with thickness variation
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DOI：
10.1063/1.4849935
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发表时间：
2013-12-21
影响因子：
3.2
通讯作者：
Vouagner, D.
中科院分区：
文献类型：
--
作者：
Degioanni, S.;Jurdyc, A. -M.;Vouagner, D.
本文采用溶胶-凝胶法将非晶二氧化钛（TiO2）薄膜沉积在市售Klarite衬底上，以产生表面增强拉曼散射（SERS）。衬底由微米大小的金字塔形凹坑的方形阵列和一层金涂层组成。在表面沉积了几层薄薄的TiO2层，研究了薄膜厚度的影响。最终，我们获得了金纳米结构对无定形TiO2层的SERS信息，其范围小于几纳米。导致这种增强的机制是化学和电磁效应共同作用的产物，其中等离子体诱导的电荷转移起着重要作用。(C) 2013 AIP出版有限责任公司
In this paper, amorphous titanium dioxide (TiO2) thin films have been deposited on a commercially available Klarite substrate using the sol-gel process to produce surface-enhanced Raman scattering (SERS). The substrate consists of square arrays of micrometer-sized pyramidal pits in silicon with a gold coating. Several thin TiO2 layers have been deposited on the surface to study the influence of film thickness. Ultimately, we obtained information on SERS of an amorphous TiO2 layer by gold nanostructures, whose range is less than a few nanometers. Mechanisms responsible for the enhancement are the product of concomitant chemical and electromagnetic effects with an important contribution from plasmon-induced charge transfer. (C) 2013 AIP Publishing LLC.