Refractive Index Change Due to Volume-Phase Transition in Polyacrylamide Gel Nanospheres for Optoelectronics and Bio-photanics
Refractive Index Change Due to Volume-Phase Transition in Polyacrylamide Gel Nanospheres for Optoelectronics and Bio-photanics
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DOI：
10.1143/apex.2.057001
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发表时间：
2009-05-01
影响因子：
2.3
通讯作者：
Neogi, Arup
中科院分区：
文献类型：
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作者：
Garner, Brett W.;Cai, Tong;Neogi, Arup
聚（N-异丙基丙烯酰胺）（PNIPAM）水凝胶纳米球的响应全球温度刺激的低临界溶液温度进行了研究，作为在聚合物网络中的水含量被修改。凝胶纳米粒子的折射率作为温度的函数使用光谱椭圆偏振法测量。纳米球的体积减少了40%，导致介质的光散射性质的改变。温度从33 ° C变化到34 ° C导致纳米球的体积收缩，这伴随着凝胶网络的折射率增加8-10%。(c)2009日本应用物理学会
Poly(N-isopropylacrylamide) (PNIPAM) hydrogel nanospheres response to global temperature stimuli across the low critical solution temperature is studied as the water content in the polymer network is modified. The refractive index of gel nanoparticles was measured as a function of temperature using spectroscopic ellipsometry. The volume of the nanospheres reduces by 40% resulting in a modification of light scattering properties of the medium. A change in temperature from 33 to 34 degrees C results in a volume contraction of nanospheres which is accompanied by 8-10% enhancement in the refractive index of the gel network. (c) 2009 The Japan Society of Applied Physics