Effect of titanium dioxide (TiO2) nanoparticle coating on the detection performance of microfiber knot resonator sensors for relative humidity measurement

被引：28

作者：

Faruki, Md Jahid ^{[1
]}

Ab Razak, Mohd Zulhakimi ^{[1
]}

Azzuhri, Saaidal R. ^{[1
]}

Rahman, Muhammad Towfiqur ^{[1
]}

Soltanian, Mohammad Reza Khalifeh ^{[1
]}

Brambilla, Gilberto ^{[2
]}

Rahman, B. M. Azizur ^{[3
]}

Grattan, Kenneth T. V. ^{[3
]}

De La Rue, Richard ^{[4
]}

Ahmad, Harith ^{[1
]}

机构：

[1] Univ Malaya, Photon Res Ctr, Kuala Lumpur 50603, Malaysia

[2] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1TW, Hants, England

[3] City Univ London, Sch Math Comp Sci & Engn, Northampton Sq, Northampton EC1V 0HB, England

[4] Univ Glasgow, Sch Engn, Optoelect Res Grp, Rankine Bldg,Oakfield Ave, Glasgow G12 8LT, Lanark, Scotland

来源：

MATERIALS EXPRESS | 2016年 / 6卷 / 06期

关键词：

Fiber Sensor; Tapered Fiber; Microfiber Knot Resonator; Humidity Sensor; Titanium Dioxide (TiO2); SENSITIVITY;

D O I：

10.1166/mex.2016.1342

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, the sensitivity and the linearity of the un-coated and TiO2-coated microfiber knot resonator (MKR) have been analyzed. The MKR is very sensitive to humidity changes since its refractive index is strongly humidity dependent. As a result, shifts occur in the resonance wavelength and there are also changes in output power. The un-coated MKR showed a sensitivity of 1.3 pm/% RH, in terms of the resonance wavelength, and a sensitivity of 0.0626 dB/% RH for the transmitted output power. The sensitivity increased greatly after the deposition of a porous TiO2 nanoparticle coating on the MKR. The TiO2-coated MKR showed an improved sensitivity of 2.5 pm/% RH, with respect to the resonance wavelength, and 0.0836 dB/% RH for the transmitted output power. This MKR sensor has the potential for use in a variety of humidity sensing applications.

引用

页码：501 / 508

页数：8

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