Irreversible redshift of transmission spectrum of gold nanoparticles doped in liquid crystals

被引：18
|
作者：
Hsu, Li-Hsuan [1 ]
Lo, Kuang-Yao [1 ]
Huang, Shih-An [1 ]
Huang, Chi-Yen [2 ]
Yang, Chung-Sung [3 ]
机构：
[1] Natl Chia Yi Univ, Dept Appl Phys, Chiayi 600, Taiwan
[2] Natl Changhua Univ Educ, Grad Inst Photon, Changhua 500, Taiwan
[3] Natl Chia Yi Univ, Dept Appl Chem, Chiayi 600, Taiwan
来源：
APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 18期
关键词：
D O I：
10.1063/1.2926658
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The absorption peak of gold (Au) nanoparticles doped in liquid crystal (ANDLC) is controllable by applying an external applied voltage before aggregation occurs. Au nanoparticles aggregate when the dielectrophoresis force, which is induced by the gradient of the square of the electric filed close to the sides of the host liquid crystal cell, overcomes the viscosity between An nanoparticles and the LCs. This result leads to the irreversible redshift. A controllable filter with unpolarized light enables an ANDLC cell under the threshold voltage to prevent the aggregation effect. (C) 2008 American Institute of Physics.
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页数：3
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