Shape-dependent plasmon-resonant gold nanoparticles
Shape-dependent plasmon-resonant gold nanoparticles
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DOI：
10.1002/smll.200500299
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发表时间：
2006-05-01
期刊：
影响因子：
13.3
通讯作者：
Murphy, CJ
中科院分区：
文献类型：
--
作者：
Orendorff, CJ;Sau, TK;Murphy, CJ
据报道，金纳米颗粒具有独特的形状依赖性等离子体共振，覆盖了广泛的可见光谱。纳米颗粒消光具有光吸收和散射分量，这些分量依赖于尺寸和形状，并且可能具有相同的波长依赖性。除了不同形状的纳米颗粒的可调谐等离子共振之外，观察到的光散射也高度依赖于各向异性纳米棒的方向。纳米棒取向是通过在透射显微镜中使用偏振入射辐射观察到的不同颜色的瑞利散射来实现的。结果表明，金纳米粒子可用作近场光学显微镜资源和生物标记。
The unique shape-dependent plasmon resonance of gold nanoparticles which covers a wide range of the visible spectrum, was reported. Nanoparticle extinction has both light absorption and scattering components which are size-and shape-dependent, and may have the same wavelength dependence. In addition to tunable plasmon resonance from nanoparticles of different shapes, the observed light scattering was also highly dependent on the orientation of anistropic nanorods. Nanorod orientation was realized from different colors of Rayleigh scattering observed using polarized incident radiation in a transmission microscope. The results show that gold nanoparticles are useful as near-filed optical microscopy resources and in biological labeling.