HUMIDITY SENSITIVE CHARACTERISTICS OF CARBOXYLATION CARBON NANOTUBES MODIFIED WITH LiClO4

2004 ◽  
Vol 01 (01) ◽  
pp. 33-38
Author(s):  
XINGJIU HUANG ◽  
YUFENG SUN ◽  
LIANCHAO WANG ◽  
FANLI MENG ◽  
JINHUAI LIU
Keyword(s):  
Carbon Nanotubes ◽  
High Sensitivity ◽  
Sensing Element ◽  
Humidity Sensing ◽  
Sensing Properties ◽  
Carboxylate Groups ◽  
Sensitivity And Selectivity ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Humidity Sensing Properties

In this paper, the humidity sensing properties of multi-walled carbon nanotubes modified with LiClO 4 was investigated. FTIR spectra showed that the ends of carbon nanotubes purified with nitric acid was opened and saturated with carboxylic acid groups and carboxylate groups. For comparison, the humidity sensing characteristics of four elements, MnWO 4 (Hubnerite), BaTiO 3 (Perovskite), NiWO 4 (Huberite), ZnCr 2 O 4 (Spinel) were discussed. Experimental data showed that LiClO 4/ MWNTs element exhibited excellent humidity sensing properties, that is, the response time can reach 7 min, the recovery time within 1 min and its sensitivity up to 35 000. Also, it was found that a small increase in resistance of pure MWNTs disappeared during the first few minutes after exposure to water by modifying with LiClO 4. The static and dynamic measurements showed that WMNTs / LiClO 4 sensing element exhibited high sensitivity and selectivity to water vapor.

scholarly journals Highly Sensitive Humidity Sensors Based on Polyethylene Oxide/CuO/Multi Walled Carbon Nanotubes Composite Nanofibers

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1037
Author(s):  
Waqas Ahmad ◽  
Bushra Jabbar ◽  
Imtiaz Ahmad ◽  
Badrul Mohamed Jan ◽  
Minas M. Stylianakis ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polyethylene Oxide ◽  
Composite Nanofibers ◽  
Low Cost ◽  
High Sensitivity ◽  
Humidity Sensing ◽  
Sensing Applications ◽  
Multi Walled Carbon Nanotubes ◽  
Lcr Meter ◽  
Walled Carbon Nanotubes

Polymer composites are favorite materials for sensing applications due to their low cost and easy fabrication. In the current study, composite nanofibers consisting of polyethylene oxide (PEO), oxidized multi-walled carbon nanotubes (MWCNT) and copper oxide (CuO) nanoparticles with 1% and 3% of fillers (i.e., PEO–CuO–MWCNT: 1%, and PEO–CuO–MWCNT: 3%) were successfully developed through electrospinning for humidity sensing applications. The composite nanofibers were characterized by FTIR, XRD, SEM and EDX analysis. Firstly, they were loaded on an interdigitated electrode (IDE), and then the humidity sensing efficiency was investigated through a digital LCR meter (E4980) at different frequencies (100 Hz–1 MHz), as well as the percentage of relative humidity (RH). The results indicated that the composite nanofibers containing 1% and 3% MWCNT, combined with CuO in PEO polymer matrix, showed potent resistive and capacitive response along with high sensitivity to humidity at room temperature in an RH range of 30–90%. More specifically, the PEO–CuO–MWCNT: 1% nanocomposite displayed a resistive rapid response time within 3 s and a long recovery time of 22 s, while the PEO–CuO–MWCNT: 3% one exhibited 20 s and 11 s between the same RH range, respectively.

Multi-Walled Carbon Nanotubes/Graphene Oxide Composites for Humidity Sensing

2013 ◽  
Vol 13 (12) ◽  
pp. 4749-4756 ◽  
Author(s):  
Xiaoyu Li ◽  
Xiangdong Chen ◽  
Yao Yao ◽  
Ning Li ◽  
Xinpeng Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Humidity Sensing ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Oxide Composites

Gas sensing properties of tin dioxide coated onto multi-walled carbon nanotubes

2006 ◽  
Vol 497 (1-2) ◽  
pp. 355-360 ◽  
Author(s):  
Yan-Li Liu ◽  
Hai-Feng Yang ◽  
Yu Yang ◽  
Zhi-Min Liu ◽  
Guo-Li Shen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Tin Dioxide ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Room-temperature hydrogen sensing properties of SnO2-coated multi-walled carbon nanotubes

Carbon ◽  
2010 ◽  
Vol 48 (13) ◽  
pp. 3976
Author(s):  
Xue Sun ◽  
Hai-Tao Fang ◽  
Hui-Long Yu ◽  
Yi Chu ◽  
Bao-You Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Room Temperature ◽  
Sensing Properties ◽  
Hydrogen Sensing ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

A highly sensitive glucose sensor based on a gold nanoparticles/polyaniline/multi-walled carbon nanotubes composite modified glassy carbon electrode

2018 ◽  
Vol 42 (14) ◽  
pp. 11944-11953 ◽  
Author(s):  
Xinping Zeng ◽  
Yazhou Zhang ◽  
Xiling Du ◽  
Yanfei Li ◽  
Wenwei Tang
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Glucose Sensor ◽  
High Sensitivity ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Highly Sensitive ◽  
Multi Walled Carbon Nanotubes ◽  
Application Potential ◽  
Walled Carbon Nanotubes

The PTFE/GOx/AuNPs/PANI/MWCNTs/GCE glucose sensor possesses wide linear range, low detection limit, high sensitivity, which can measure the glucose in human serum and holds application potential.

Capacitive humidity sensing properties of carbon nanotubes grown on silicon nanoporous pillar array

2007 ◽  
Vol 50 (4) ◽  
pp. 510-515 ◽  
Author(s):  
WeiFen Jiang ◽  
ShunHua Xiao ◽  
HuanYun Zhang ◽  
YongFen Dong ◽  
XinJian Li
Keyword(s):  
Carbon Nanotubes ◽  
Humidity Sensing ◽  
Pillar Array ◽  
Sensing Properties ◽  
Humidity Sensing Properties
Sign in / Sign up

Export Citation Format

Share Document