Size effect of Ag nanoparticles on surface plasmon resonance
Size effect of Ag nanoparticles on surface plasmon resonance
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DOI：
10.1016/j.surfcoat.2008.06.080
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发表时间：
2008-08-30
影响因子：
5.4
通讯作者：
Lu, Yu-Jen
中科院分区：
文献类型：
--
作者：
Lee, Kuang-Che;Lin, Su-Jien;Lu, Yu-Jen
本文研究了银纳米颗粒尺寸对SPR光学特性的影响。采用射频磁控溅射法在掺氟氧化锡（FTO）玻璃衬底上制备了纳米颗粒，并通过不同的沉积时间和随后的快速热退火（RTA）来控制颗粒尺寸。为了制备Ag膜，首先通过真空溅射技术在玻璃或FTO衬底上沉积不同厚度的Ag膜。一些样品通过快速热退火形成纳米颗粒。然后通过将具有和不具有纳米颗粒的基底浸入0.2mM N719染料溶液中来敏化它们。最后，通过将其吸附在精细的银岛上来研究吸收系数的影响。表面等离子体共振增强了银纳米粒子的样品的吸收高于没有纳米粒子的样品。在本研究中，表面等离子体特征吸收的峰值位置随着纳米颗粒的粒径增加而红移。Ag粒子的结构和数量对表面等离子体共振效应的影响非常关键。皇冠版权所有（C）2008年出版的爱思唯尔B.V.保留所有权利。
This work studies the effect of the sized silver (Ag) nanoparticles on the optical property of SPR. Nanoparticles were prepared on fluorine-doped-tin-oxide (FTO) coated glass substrates by RF magnetron sputtering with various deposition times and the subsequent rapid thermal annealing (RTA) to control the particle size. To make the Ag films, Ag films of different thicknesses were first deposited on either glass or FTO substrate by a vacuum sputtering technique. Some of the samples founded nanoparticles by rapid thermal annealing. The substrates with and without nanoparticles were then sensitized by immersing them in a 0.2 mM N719 dye solution. Finally, the effect of the absorption coefficient was investigated by adsorbing it on fine silver Ag islands. The surface plasmon resonance enhanced the absorption by the sample with Ag nanoparticles above that of the sample without nanoparticles. In this study, the peak position of the surface plasmon characteristic absorption increased with the grain size of the nanoparticles in a red-shift. The structure and the quantity of Ag particles were very critical to the surface plasmon resonance effect. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.