材料科学
等离子体子
表面等离子共振
热稳定性
纳米结构
四极
结晶学
表征(材料科学)
各向异性
六方晶系
相(物质)
纳米技术
化学
光学
光电子学
纳米颗粒
物理
有机化学
原子物理学
作者
Caixia Kan,Xin‐Guang Zhu,Guanghou Wang
摘要
Single-crystalline gold microplates of several 10 μm in lateral size, characterized by hexagonal, truncated triangular, and triangular shapes with (111) planes as two basal surfaces, have been synthesized in large quantities through a solution phase process. Significantly, such anisotropic Au nanostructures exhibit remarkable optical properties, in which the dipole plasmon resonance shifting in the NIR region and the quadrupole plasmon resonance at ∼820 nm were observed. Fragmentation of Au microplates is found when the temperature is higher than 450 °C, indicating they are not thermodynamically stable structure at high temperature. Investigations on the Au microplates upon heating suggest that the melting and collapsing start mainly at the edges that should be Au (110) facets. This work is valuable for Au nanostructures applied at elevated temperatures.
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