Tunable Surface Plasmon Band of Position Selective Ag and Au Nanoparticles in Thin Block Copolymer Micelle Films
Tunable Surface Plasmon Band of Position Selective Ag and Au Nanoparticles in Thin Block Copolymer Micelle Films
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DOI：
10.1021/cm901245g
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发表时间：
2009-08
影响因子：
8.6
通讯作者：
H. Acharya;Jinwoo Sung;B. Sohn;Dong Ha Kim;K. Tamada;Cheolmin Park
中科院分区：
文献类型：
--
作者：
H. Acharya;Jinwoo Sung;B. Sohn;Dong Ha Kim;K. Tamada;Cheolmin Park
该手稿描述了一种新的方法来制造一个薄的复合膜的基础上旋涂，其中表面等离子体带的Au和Ag纳米粒子有效地相互耦合，因为两个纳米粒子的位置选择性沉积在一个自组装的嵌段共聚物结构。简单的溶液共混和随后的旋涂Au纳米粒子（NPs）和嵌段共聚物胶束包含银纳米粒子在核心区域提供了一个简便的路线，用于控制耦合的表面等离子体带（SPB）的两个纳米粒子超过100 nm的波长在薄的固体膜。两个单独的SPB的有效耦合依赖于自组装的复合结构，其中Ag和Au NP分别优先位于胶束的核心和电晕区域，不仅允许受控的颗粒间距离，而且允许NP在整个膜中均匀分散。
The manuscript describes a novel method to fabricate a thin composite film based on spin coating in which surface plasmon bands of Au and Ag nanoparticles are effectively coupled with each other because of position-selective deposition of both nanoparticles on a self-assembled block copolymer structure. Simple solution blending and subsequent spin coating of Au nanoparticles (NPs) and a block copolymer micelles containing Ag NPs in the core regions offers a facile route for controlling coupled surface plasmon band (SPB) of the two NPs over 100 nm in wavelength in thin solid films. Effective coupling of two individual SPBs relies upon the self-assembled composite structure where Ag and Au NPs are preferentially located in the core and corona regions of the micelles, respectively, allowing not only a controlled interparticle distance but also homogeneous dispersion of the NPs throughout film.