scholarly journals Humidity Sensitivity of Multi-Walled Carbon Nanotube Networks Deposited by Dielectrophoresis

Sensors ◽  
2009 ◽  
Vol 9 (3) ◽  
pp. 1714-1721 ◽  
Author(s):  
Litao Liu ◽  
Xiongying Ye ◽  
Kang Wu ◽  
Rui Han ◽  
Zhaoying Zhou ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Multi Walled Carbon Nanotube ◽  
Carbon Nanotube Networks ◽  
Humidity Sensitivity

Controlled Carbon Nanotube Networks and its Corresponding Channel Effect at High Bias

2006 ◽  
Vol 963 ◽  
Author(s):  
Jun Huang ◽  
Bangalore Kiran Rao ◽  
Harindra Vedala ◽  
Do-Hyun Kim ◽  
Minhyon Jeon ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Electrical Breakdown ◽  
Single Walled Carbon Nanotube ◽  
Large Current ◽  
Linear Resistance ◽  
Current Voltage ◽  
Multi Walled Carbon Nanotube ◽  
High Bias ◽  
Current Densities ◽  
Carbon Nanotube Networks

ABSTRACTGeometrically controlled single-walled carbon nanotube (SWNT) and multi-walled carbon nanotube (MWNT) networks were fabricated by a width confinement technique to characterize their electrical characteristics. The results demonstrated non-linear resistance decay with the number of conducting channels. The current-voltage characteristics at high field were studied until the electrical breakdown took place. Large current (∼2 mA), low resistance (∼5 KΩ) and current densities exceeding ∼108 A/cm2 were demonstrated from multi-channel MWNT networks confined in a 10 μm × 15 μm trench. Additionally, chronological SEM imaging was used to identify the breakdown sequences in the carbon nanotube networks, which revealed a strong tendency for CNT breakdown to occur in the vicinity of CNT-CNT intersections. Our results offer insights for interconnect applications using CNT networks.

scholarly journals Humidity Sensor Based on Multi-Walled Carbon Nanotube Thin Films

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
C. L. Cao ◽  
C. G. Hu ◽  
L. Fang ◽  
S. X. Wang ◽  
Y. S. Tian ◽  
...  
Keyword(s):  
Thin Films ◽  
Carbon Nanotube ◽  
Relative Humidity ◽  
Humidity Sensor ◽  
Sensitive Material ◽  
Humidity Sensors ◽  
Multi Walled Carbon Nanotube ◽  
Chemically Treated ◽  
Humidity Sensitivity ◽  
Higher Sensitivity

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.

Temperature Dependence of Electrical Conductivity of Multi-Walled Carbon Nanotube Networks in a Polystyrene Composite

2013 ◽  
Vol 543 ◽  
pp. 356-359 ◽  
Author(s):  
David Petras ◽  
Petr Slobodian ◽  
Robert Olejnik ◽  
Pavel Riha
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Temperature Dependence ◽  
Conduction Mechanism ◽  
Specific Role ◽  
Conduction Path ◽  
Heterogeneous Model ◽  
Multi Walled Carbon Nanotube ◽  
Carbon Nanotube Networks

The conductance properties of multi-walled carbon nanotube mats and their polystyrene composite were examined to investigate the mechanism of conduction and the specific role of the supporting polymer. By measuring the temperature dependence of the conductance, it was found that the conduction mechanism in carbon nanotube mat follows the series heterogeneous model when the conductance is described as the sum of metallic and barrier portions of the conduction path. This mechanism is affected by the polymeric portion of the composite, since the temperature dependence of the composite conductance is decreased.

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