Temperature-dependent piezoresistivity in an MWCNT/epoxy nanocomposite temperature sensor with ultrahigh performance

被引：47

作者：

Alamusi ^{[1
]}

Li, Yuan ^{[2
]}

Hu, Ning ^{[3
,4
]}

Wu, Liangke ^{[4
]}

Yuan, Weifeng ^{[5
]}

Chang, Christiana ^{[6
]}

Liu, Yaolu ^{[4
]}

Ning, Huiming ^{[4
]}

Li, Jinhua ^{[4
]}

Surina ^{[4
]}

Atobe, Satoshi ^{[7
]}

Fukunaga, Hisao ^{[7
]}

机构：

[1] Inner Mongolia Agr Univ, Coll Mat Sci & Art Design, Hohhot 010018, Inner Mongolia, Peoples R China

[2] Tohoku Univ, Dept Nanomech, Aoba Ku, Sendai, Miyagi 9808579, Japan

[3] Chongqing Univ, Dept Engn Mech, Chongqing 400044, Peoples R China

[4] Chiba Univ, Dept Mech Engn, Inage Ku, Chiba 2638522, Japan

[5] Southwest Univ Sci & Technol, Sch Mfg Sci & Engn, Mianyang 621010, Peoples R China

[6] Univ Houston, Dept Mech Engn, Houston, TX 77004 USA

[7] Tohoku Univ, Dept Aerosp Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

NANOTECHNOLOGY | 2013年 / 24卷 / 45期

关键词：

CARBON NANOTUBE; CONDUCTIVITY; FABRICATION;

D O I：

10.1088/0957-4484/24/45/455501

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A temperature sensor was fabricated from a polymer nanocomposite with multi-walled carbon nanotube (MWCNT) as nanofiller (i.e., MWCNT/epoxy). The electrical resistance and temperature coefficient of resistance (TCR) of the temperature sensor were characterized experimentally. The effects of temperature (within the range 333-373 K) and MWCNT content (within the range 1-5 wt%) were investigated thoroughly. It was found that the resistance increases with increasing temperature and decreasing MWCNT content. However, the resistance change ratio related to the TCR increases with increasing temperature and MWCNT content. The highest value of TCR (0.021 K-1), which was observed in the case of 5 wt% MWCNT, is much higher than those of traditional metals and MWCNT-based temperature sensors. Moreover, the corresponding numerical simulation-conducted to explain the above temperature-dependent piezoresistivity of the nanocomposite temperature sensor-indicated the key role of a temperature-dependent tunneling effect.

引用

页数：6

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