Humidity Sensor Based on Multi-Walled Carbon Nanotube Thin Films | Zendy

Changlin Cao | Zendy; Chenguo Hu | Zendy; Liang Fang | Zendy; S. X. Wang | Zendy; Ying Tian | Zendy; C Pan | Zendy

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Humidity Sensor Based on Multi-Walled Carbon Nanotube Thin Films

Author(s) -

Changlin Cao,

Chenguo Hu,

Liang Fang,

S. X. Wang,

Ying Tian,

C Pan

Publication year - 2010

Publication title -

journal of nanomaterials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.463

H-Index - 66

eISSN - 1687-4129

pISSN - 1687-4110

DOI - 10.1155/2011/707303

Subject(s) - humidity , materials science , carbon nanotube , relative humidity , thin film , composite material , sensitivity (control systems) , nanotube , nanotechnology , chemical engineering , meteorology , electronic engineering , physics , engineering

The properties of the humidity sensors made of chemically treated and untreated multi-walled carbon nanotube (MWCNT) thin films are investigated systematically. It shows that both the chemically treated and untreated MWCNT thin films demonstrate humidity sensitive properties, but the former have stronger sensitivity than the latter. In the range of 11%–98% relative humidity (RH), the resistances of the chemically treated and untreated MWCNT humidity sensors increase 120% and 28%, respectively. Moreover, the treated humidity sensors showed higher sensitivity and better stability. In addition, the response and recover properties, and stabilization of the humidity sensors are measured, and the humidity sensitive mechanisms of the sensors are analyzed. The humidity sensitivity of carbon nanotube thin films indicates it promise as a kind of humidity sensitive material

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