Structure versus Composition: A Single-Particle Investigation of Plasmonic Bimetallic Nanocrystals
Structure versus Composition: A Single-Particle Investigation of Plasmonic Bimetallic Nanocrystals
复制标题
结构与成分：等离激元双金属纳米晶体的单粒子研究
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
S. Skrabalak
中科院分区：
文献类型：
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作者：
Alison F. Smith;Rebecca G. Weiner;Matthew M. Bower;B. Dragnea;S. Skrabalak
星状纳米结构是一类新的等离子体胶体，其中组成和整体结构之间的相互作用可以提供可调的光学性质和新的功能。然而，解耦复杂的组成和结构的局部表面等离子体共振（LSPR）的贡献仍然是一个挑战，特别是当monoclonal对应物是不可合成的比较。在这里，星状的Au-Pd纳米晶体（NC）与OH对称性被用作模型系统，以解耦结构和复杂的成分对LSPR的影响。使用光学暗场光谱和扫描电子显微镜实现了LSPR与八角形Au-Pd NCs结构的单粒子相关性。这些测量结果进行了比较，计算的光学性质的结构相似的金只有章鱼的时域有限差分法。这种比较使复杂的组成，这是由扫描transmits确定的作用。
Stellated bimetallic nanostructures are a new class of plasmonic colloids in which the interplay between composition and overall architecture can provide tunable optical properties and new functionality. However, decoupling the complex compositional and structural contributions to the localized surface plasmon resonance (LSPR) remains a challenge, especially when the monometallic counterparts are not synthetically accessible for comparison. Here, stellated Au–Pd nanocrystals (NCs) with Oh symmetry are used as a model system to decouple structural and complex compositional effects on LSPR. Single-particle correlation of the LSPR with the structure of octopodal Au–Pd NCs was achieved using optical dark-field spectroscopy with scanning electron microscopy. These measurements were compared to calculations of the optical properties of structurally similar Au-only octopods by the finite difference time domain method. This comparison enabled the role of complex composition, which was determined by scanning trans...
影响因子：
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作者：
Hu, Min;Novo, Carolina;Hartland, Gregory V.
通讯作者：
Hartland, Gregory V.