Characterization and Humidity Sensing Properties of the Sensor Based on Na2Ti3O7 Nanotubes

被引：18

作者：

Zhang, Yupeng ^{[1
]}

Wu, Jian ^{[1
]}

Zhang, Ying ^{[1
]}

Guo, Wenbin ^{[2
]}

Ruan, Shenping ^{[1
]}

机构：

[1] Jilin Univ, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[2] Jilin Univ, Coll Elect Sci & Engn, Changchun 130012, Peoples R China

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2014年 / 14卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Na2Ti3O7; Nanotubes; Response-Recovery Time; Humidity Sensor; Sensing Mechanism; Complex Impedance; ROOM-TEMPERATURE; TIO2; NANOFIBERS; MECHANISM; ION; CHEMIRESISTORS; TRANSPORT; TITANATE; FILMS;

D O I：

10.1166/jnn.2014.8038

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Na2Ti3O7 nanotubes was synthesized by a hydrothermal method, and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Then the material was coated on Al2O3 ceramic substrate to fabricate humidity sensors using Ag-Pd as interdigitated electrodes. The sensor shows high humidity sensitivity and quick response-recovery time. The impedance changes about five orders of magnitude within humidity range from 11% to 95% relative humidity (RH). At the frequency of 100 Hz, the response time is 2 s and recovery time is 4 s, and the maximum hysteresis is less than 3% RH. Moreover, complex impedance property at different RH was investigated to study sensing mechanism. The results indicate the potential applications of Na2Ti3O7 nanotubes for fabricating high-performance humidity sensors.

引用

页码：4303 / 4307

页数：5

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