Ultra-fast Hygrometer based on U-shaped Optical Microfiber with Nanoporous Polyelectrolyte Coating

被引：23

作者：

Chen, George Y. ^{[1
]}

Wu, Xuan ^{[2
]}

Kang, Yvonne Qiongyue ^{[1
]}

Yu, Li ^{[3
,4
]}

Monro, Tanya M. ^{[1
]}

Lancaster, David G. ^{[1
]}

Liu, Xiaokong ^{[2
]}

Xu, Haolan ^{[2
]}

机构：

[1] Univ South Australia, Sch Engn, Laser Phys & Photon Devices Labs, Mawson Lakes, SA 5095, Australia

[2] Univ South Australia, Future Ind Inst, Mawson Lakes, SA 5095, Australia

[3] Shenzhen Univ, Coll Optoelect Engn, Shenzhen Key Lab Laser Engn, Shenzhen 518060, Peoples R China

[4] Shenzhen Univ, Coll Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

关键词：

GRAPHENE OXIDE; HUMIDITY;

D O I：

10.1038/s41598-017-08562-1

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Real-time measurement of the relative humidity of air has applications ranging from process control to safety. By using a microfiber form-factor, we demonstrate a miniature and fast-response hygrometer with the shortest-ever response time (3 ms). The sensor head consists of an optical microfiber of 10 mu m diameter and 2 mm length configured to form a compact U-shaped probe, and functionalized with a polyelectrolyte multilayer coating of 1.0 bilayer. The sensing mechanism is primarily water-absorption-based optical loss. We have measured a response time of 3 ms and a recovery time of 36 ms. The sensitivity is as high as 0.4%/% RH, and the detection limit is as low as 1.6% RH. The maximum relative humidity is 99% RH, before reaching a recoverable dew-point.

引用

页数：8

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