Maneuvering the surface plasmon resonance of silver nanostructures through shape-controlled synthesis
Maneuvering the surface plasmon resonance of silver nanostructures through shape-controlled synthesis
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DOI：
10.1021/jp0608628
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发表时间：
2006-08-17
影响因子：
3.3
通讯作者：
Xia, Younan
中科院分区：
文献类型：
--
作者：
Wiley, Benjamin J.;Im, Sang Hyuk;Xia, Younan
银纳米结构是表面等离子体的容器，等离子体是与入射光相对应的传导电子的集体振荡。通过控制容器的形状，人们可以控制电子振荡的方式，进而控制纳米结构如何散射光、吸收光和增强局部电场。通过一系列离散偶极子近似（DDA）计算，每个计算都具有独特的形态，我们说明了形状控制如何调节银纳米结构的光学特性。通过对具有可控角截断、右双锥体和五边形纳米线的纳米立方体进行实验测量，验证了计算的预测结果。纳米结构形状的控制允许优化等离子体共振分子检测和光谱学。
Silver nanostructures are containers for surface plasmons - the collective oscillation of conduction electrons in phase with incident light. By controlling the shape of the container, one can control the ways in which electrons oscillate, and in turn how the nanostructure scatters light, absorbs light, and enhances local electric fields. With a series of discrete dipole approximation (DDA) calculations, each of a distinctive morphology, we illustrate how shape control can tune the optical properties of silver nanostructures. Calculated predictions are validated by experimental measurements performed on nanocubes with controllable corner truncation, right bipyramids, and pentagonal nanowires. Control of nanostructure shape allows optimization of plasmon resonance for molecular detection and spectroscopy.