Optical gas sensing with dip-coated carbon nanotubes through the modulation of photoluminescence and optical absorption

The nanocomposite of polyaniline (PAni)-coated Carbon nanotubes (CNT) for NH3gas sensing application are presented in this paper. The nanorods of PAni/CNT nanocomposite was synthesized by chemical oxidative polymerization of aniline using ammonium persulfate in acidic medium. The aniline was adsorbed in CNT by vacuum absorption method. The morphologies and properties of the nanocomposite have been characterized by SEM, XRD and FTIR respectively. Thin sensor of PAni/CNT nanorods was prepared by spin coating method. Finally, the response of these composite films for NH3gas was evaluated by monitoring the change in electrical resistance at room temperature. With compared to the pure PAni and CNT, tSubscript texthe nanorods of PAni/CNT composite films show a higher sensitivity.

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Polypyrrole Coated Carbon Nanotubes: Preparation, Characterization, and Gas-sensing Properties

Journal of Inorganic Materials ◽

10.3724/sp.j.1077.2011.00961 ◽

2011 ◽

Vol 26 (9) ◽

pp. 961-968 ◽

Cited By ~ 3

Author(s):

Zhi-Min WANG ◽

Xin-Cun TANG ◽

Yuan-Hua XIAO ◽

Xiao-Jing YU ◽

Liang ZHANG ◽

...

Keyword(s):

Carbon Nanotubes ◽

Gas Sensing ◽

Sensing Properties ◽

Gas Sensing Properties ◽

Coated Carbon

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Explosive Molecule Sensing at Lattice Defect Sites in Metallic Carbon Nanotubes

Materials Advances ◽

10.1039/d1ma00571e ◽

2021 ◽

Author(s):

Manasi Doshi ◽

Eric Paul Fahrenthold

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Experimental Research ◽

Gas Sensing ◽

Lattice Defect ◽

Sensing Mechanism ◽

Defect Sites ◽

Chemiresistive Sensing ◽

Hazardous Gas

Explosives and hazardous gas sensing using carbon nanotube (CNT) based sensors has been a focus of considerable experimental research. The simplest sensors have employed a chemiresistive sensing mechanism, and rely...

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Tailoring the dispersibility of non-covalent functionalized multi-walled carbon nanotube (MWCNT) nanosuspension using shellac (SL) bio-resin: Structure-property relationship and cytotoxicity of shellac coated carbon nanotubes (SLCNTs)

Colloids and Interface Science Communications ◽

10.1016/j.colcom.2021.100395 ◽

2021 ◽

Vol 42 ◽

pp. 100395

Author(s):

A.K.M. Moshiul Alam ◽

M.D.H. Beg ◽

R.M. Yunus ◽

M.R. Islam ◽

Quazi T.H. Shubhra

Keyword(s):

Carbon Nanotubes ◽

Carbon Nanotube ◽

Structure Property ◽

Property Relationship ◽

Multi Walled Carbon Nanotube ◽

Structure Property Relationship ◽

Coated Carbon

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Design of a Dual-Mode Graphene-on-Microring Resonator for Optical Gas Sensing

IEEE Access ◽

10.1109/access.2021.3072134 ◽

2021 ◽

Vol 9 ◽

pp. 56479-56485

Author(s):

Jiaqi Wang ◽

Xinying Zhang ◽

Zhiwei Wei ◽

Huabin Qiu ◽

Yuzhi Chen ◽

...

Keyword(s):

Gas Sensing ◽

Microring Resonator ◽

Dual Mode ◽

Optical Gas Sensing

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Optical Absorption Spectroscopy of DNA-Wrapped HiPco Carbon Nanotubes

Materials Science Forum ◽

10.4028/www.scientific.net/msf.943.95 ◽

2019 ◽

Vol 943 ◽

pp. 95-99

Author(s):

Li Jun Wang ◽

Kazuo Umemura

Keyword(s):

Carbon Nanotubes ◽

Aqueous Solution ◽

Optical Absorption ◽

Absorption Spectroscopy ◽

Near Infrared ◽

Nir Spectroscopy ◽

Optical Characterization ◽

Optical Absorption Spectroscopy ◽

Double Stranded Dna

Optical absorption spectroscopy provides evidence for individually dispersed carbon nanotubes. A common method to disperse SWCNTs into aqueous solution is to sonicate the mixture in the presence of a double-stranded DNA (dsDNA). In this paper, optical characterization of dsDNA-wrapped HiPco carbon nanotubes (dsDNA-SWCNT) was carried out using near infrared (NIR) spectroscopy and photoluminescence (PL) experiments. The findings suggest that SWCNT dispersion is very good in the environment of DNA existing. Additionally, its dispersion depends on dsDNA concentration.

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