A pH-tunable hydrogel microlens array with temperature-actuated light-switching capability

被引：14

作者：

Ding, Zhenwen ^{[1
,2
]}

Ziaie, Babak ^{[2
,3
]}

机构：

[1] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[2] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA

[3] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 08期

关键词：

casting; hydrogels; microfabrication; microlenses; optical arrays; optical fabrication; optical polymers; optical switches; optical tuning; pH; thermo-optical devices; LENS;

D O I：

10.1063/1.3089689

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this letter, we demonstrate a two step casting process to fabricate a bifunctional hydrogel-based microlens array, which responds to both temperature (becomes opaque above certain temperature) and pH (changes its focal length at different pH levels), and can be operated in air for an extended period of time. Each lens in the array is 1 mm in diameter and its focal length changes from 4.5 to 55 mm when the environmental pH is varied between 2.0 and 5.0. The light-switching capability is measured to be similar to 92% when temperature increases from 25 to 35 degrees C.

引用

页数：3

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