n-Type gas sensing characteristics of chemically modified multi-walled carbon nanotubes and PMMA composite

2007 ◽  
Vol 121 (2) ◽  
pp. 496-500 ◽  
Author(s):  
Y LI ◽  
H WANG ◽  
M YANG
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensing ◽  
Chemically Modified ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Sensing Characteristics

scholarly journals CNTs based improved chlorine sensor from non-covalently anchored multi-walled carbon nanotubes with hexa-decafluorinated cobalt phthalocyanines

RSC Advances ◽  
2017 ◽  
Vol 7 (78) ◽  
pp. 49675-49683 ◽  
Author(s):  
Anshul Kumar Sharma ◽  
Aman Mahajan ◽  
R. K. Bedi ◽  
Subodh Kumar ◽  
A. K. Debnath ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Gas Sensing ◽  
Metal Phthalocyanine ◽  
Cobalt Phthalocyanines ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Sensing Characteristics

To study the effect of synergetic interactions between metal-phthalocyanine and carbon nanotubes for gas sensing characteristics of carbon nanotubes, we have synthesized F16CoPc/MWCNTs–COOH hybrid.

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

Electrochemical Determination of Rivastigmine Hydrogen Tartrate at β-Cyclodextrin/Multi-Walled Carbon Nanotubes Modified Electrode

2019 ◽  
Vol 15 (3) ◽  
pp. 211-216
Author(s):  
Bugçe Kılıçyaldır ◽  
Asiye Aslıhan Avan ◽  
Kubilay Güçlü ◽  
Mustafa Özyürek ◽  
Hayati Filik
Keyword(s):  
Carbon Nanotubes ◽  
Modified Electrode ◽  
Glassy Carbon ◽  
Pharmaceutical Formulations ◽  
Carbon Electrode ◽  
Good Sensitivity ◽  
Modified Glassy Carbon Electrode ◽  
Chemically Modified ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Background: Electrochemical techniques can easily be adopted to solve many problems of pharmaceutical interest. The implementation of electroanalytical methods in the assay of pharmaceutical formulations has increased greatly. Nowadays, owing to the critical importance of electron transfer and surface properties, chemically modified electrodes have been employed in electrochemical sensors. The chemically modified electrode is one of the most popular electroanalytical sensors and used in several applications. Methods: In this work, a β-cyclodextrine/multi-walled carbon nanotubes (β-CD/MWCNTs) composite modified glassy carbon electrode (GCE) was produced and applied to the detection of Rivastigmine hydrogen tartrate (RVT) in pharmaceutical formulations. The voltammetric feature of RVT at this β- CD/MWCNTs modified electrode was evaluated using cyclic voltammetry and square wave voltammetry. Results: The β-cyclodextrin and multi-walled carbon nanotubes modified glassy carbon electrode displayed good electrocatalytic activity in the oxidation of rivastigmine hydrogen tartrate with relatively high sensitivity, stability and lifetime. The calibration graph of the analyte was linear over the range 10- 1500 µM with two linear segments and the detection limit was obtained as 2.0 µM (S/N=3). The results showed that the electrochemical sensor has good sensitivity and selectivity. Conclusion: The β-CD/MWCNTs modified electrode displayed a high electrochemical activity and good sensitivity toward the oxidation of RVT. Compared with the bare MWCNTs coated sensor, the response of analyte increased soundly and the response potential of target analyte shifted negatively. The results indicated that the β-CD/MWCNTs film coated electrode had good catalysis to the voltammetric oxidation of RVT. The prepared sensor was applied to determine RVT in pharmaceutical samples with satisfactory yields. The outcomes indicate that β-CD/MWCNTs coated electrode is a safe choice for the detection of RVT.

Hydrogen sensing characteristics from carbon nanotube field emissions

Nanoscale ◽  
2016 ◽  
Vol 8 (10) ◽  
pp. 5599-5604 ◽  
Author(s):  
Changkun Dong ◽  
Haijun Luo ◽  
Jianqiu Cai ◽  
Fuquan Wang ◽  
Yangyang Zhao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Field Emission ◽  
Hydrogen Sensing ◽  
Field Emissions ◽  
Partial Pressures ◽  
Low Emission ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Sensing Characteristics

An innovative hydrogen sensing concept is demonstrated based on the field emission from multi-walled carbon nanotubes, where the low emission currents rise in proportion to hydrogen partial pressures above 10−9 Torr.

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