优美的金环：液晶拓扑缺陷中组装纳米棒的可调谐表面等离子体共振。
Fine Golden Rings: Tunable Surface Plasmon Resonance from Assembled Nanorods in Topological Defects of Liquid Crystals.
机构信息
Engineering Directorate, Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA, 94550, USA.
Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA, 19104, USA.
出版信息
Adv Mater. 2016 Apr 13;28(14):2731-6. doi: 10.1002/adma.201506084. Epub 2016 Feb 8.
Unprecedented, reversible, and dynamic control over an assembly of gold nanorods dispersed in liquid crystals (LC) is demonstrated. The LC director field is dynamically tuned at the nanoscale using microscale ring confinement through the interplay of elastic energy at different temperatures, thus fine-tuning its core replacement energy to reversibly sequester nanoscale inclusions at the microscale. This leads to shifts of 100 nm or more in the surface plasmon resonance peak, an order of magnitude greater than any previous work with AuNR composites.
展示了在液晶（LC）中分散的金纳米棒组装体的前所未有的、可逆的和动态的控制。通过不同温度下的弹性能量的相互作用，在纳米尺度上使用微尺度环限制来动态调整 LC 指向矢场，从而微调其核心替换能量，以在微尺度上可逆地隔离纳米级内含物。这导致表面等离子体共振峰的移动超过 100nm，比以前任何 AuNR 复合材料的工作都要大一个数量级。
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