Polymer-Coated Single-Walled Carbon Nanotubes for Ethanol and Dichloromethane Discrimination

2013 ◽  
Vol 802 ◽  
pp. 267-272 ◽  
Author(s):  
Worawut Muangrat ◽  
Rungroj Maolanon ◽  
Sirapat Pratontep ◽  
Supanit Porntheeraphat ◽  
Winadda Wongwiriyapan
Keyword(s):  
Carbon Nanotubes ◽  
Pattern Recognition ◽  
Printed Circuit Board ◽  
Gas Sensing ◽  
Principal Component ◽  
Single Walled Carbon Nanotubes ◽  
Sensor Response ◽  
Circuit Board ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Sensor response and pattern recognition of polymer-coated single-walled carbon nanotubes (SWNTs) were investigated. Printed circuit board (PCB) with Cu/Au interdigitated electrode was used as sensor platform. SWNTs network was firstly formed on PCB by drop-casting. For polymer-coated SWNTs preparation, poly(methyl methacrylate) (PMMA) and thiophene were employed as polymers to coat on SWNTs by spin coating; PMMA/SWNTs and thiophene/SWNTs. Raman spectra showed no obvious structure changes of SWNTs after polymer coating. Next, gas sensing test was conducted. Pristine SWNTs, PMMA/SWNTs and thiophene/SWNTs were exposed to vapors of ethanol and dichloromethane at room temperature. From normalized sensor response results, it was found that pristine SWNTs and PMMA/SWNTs showed the highest response to ethanol and dichloromethane vapors, respectively. In order to discriminate vapors between ethanol and dichloromethane, pattern recognition technique was utilized. Principal component analysis (PCA) results showed that pattern recognition of ethanol and dichloromethane vapors can be discriminated by using pristine SWNTs and polymer-coated SWNTs sensors.

3D, covalent and noncovalent hybrid materials based on 3-phenylcoumarin derivatives and single walled carbon nanotubes as gas sensing layers

2020 ◽  
Vol 504 ◽  
pp. 144276 ◽  
Author(s):  
Maxim S. Polyakov ◽  
Victoria N. Ivanova ◽  
Tamara V. Basova ◽  
Andrey A. Saraev ◽  
Baybars Köksoy ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hybrid Materials ◽  
Gas Sensing ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Gas sensing properties of defect-induced single-walled carbon nanotubes

2016 ◽  
Vol 228 ◽  
pp. 688-692 ◽  
Author(s):  
Jaeseong Kim ◽  
Sun-Woo Choi ◽  
Je-Haeng Lee ◽  
Youngchul Chung ◽  
Young Tae Byun
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensing ◽  
Single Walled Carbon Nanotubes ◽  
Sensing Properties ◽  
Single Walled Carbon ◽  
Gas Sensing Properties ◽  
Walled Carbon Nanotubes

Formaldehyde gas sensing chip based on single-walled carbon nanotubes and thin water layer

2011 ◽  
Vol 47 (10) ◽  
pp. 2892 ◽  
Author(s):  
Ji Yeon Kim ◽  
Joohyung Lee ◽  
Seunghun Hong ◽  
Taek Dong Chung
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensing ◽  
Water Layer ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

High-yield photolytic generation of brominated single-walled carbon nanotubes and their application for gas sensing

2014 ◽  
Vol 50 (78) ◽  
pp. 11568-11571 ◽  
Author(s):  
D. Hines ◽  
M. H. Rümmeli ◽  
D. Adebimpe ◽  
D. L. Akins
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensing ◽  
Single Walled Carbon Nanotubes ◽  
High Yield ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

We present a facile and efficient photobromination technique for the covalent sidewall functionalization of SWNT using N-bromosuccinamide as the bromine source.

Influence of the growth morphology of single-walled carbon nanotubes on gas sensing performance

2006 ◽  
Vol 17 (17) ◽  
pp. 4424-4430 ◽  
Author(s):  
W Wongwiriyapan ◽  
S Honda ◽  
H Konishi ◽  
T Mizuta ◽  
T Ohmori ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensing ◽  
Single Walled Carbon Nanotubes ◽  
Growth Morphology ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Sensing Performance

scholarly journals A Hybrid Nanomaterial Based on Single Walled Carbon Nanotubes Cross-Linked via Axially Substituted Silicon (IV) Phthalocyanine for Chemiresistive Sensors

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2073 ◽  
Author(s):  
Maxim Polyakov ◽  
Victoria Ivanova ◽  
Darya Klyamer ◽  
Baybars Köksoy ◽  
Ahmet Şenocak ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Relative Humidity ◽  
Single Walled Carbon Nanotubes ◽  
Sensor Response ◽  
Hybrid Nanomaterial ◽  
Single Walled Carbon ◽  
Electron Microscopies ◽  
Transmission Electron ◽  
Different Temperatures ◽  
Walled Carbon Nanotubes

In this work, the novel hybrid nanomaterial SWCNT/SiPc made of single walled carbon nanotubes (SWCNT) cross-linked via axially substituted silicon (IV) phthalocyanine (SiPc) was studied as the active layer of chemiresistive layers for the detection of ammonia and hydrogen. SWCNT/SiPc is the first example of a carbon-based nanomaterial in which an axially substituted phthalocyanine derivative is used as a linker. The prepared hybrid material was characterized by spectroscopic methods, thermogravimetry, scanning and transmission electron microscopies. The layers of the prepared hybrid were tested as sensors toward ammonia and hydrogen by a chemiresistive method at different temperatures and relative humidity as well as in the presence of interfering gases like carbon dioxide, hydrogen sulfide and volatile organic vapors. The hybrid layers exhibited the completely reversible sensor response to both gases at room temperature; the recovery time was 100–200 s for NH3 and 50–120 s in the case of H2 depending on the gas concentrations. At the relative humidity (RH) of 20%, the sensor response was almost the same as that measured at RH 5%, whereas the further increase of RH led to its 2–3 fold decrease. It was demonstrated that the SWCNT/SiPc layers can be successfully used for the detection of both NH3 and H2 in the presence of CO2. On the contrary, H2S was found to be an interfering gas for the NH3 detection.

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