Hybrid gas sensing and transport properties of few-walled CNTs decorated with discrete SnO2 nanoparticles

Kamalakannan Ranganathan; Ilango Shanmugam; Mohammed Kamruddin; Ashok K. Tyagi

doi:10.1166/jnn.2016.12083

Hybrid gas sensing and transport properties of few-walled CNTs decorated with discrete SnO₂ nanoparticles

Kamalakannan Ranganathan^*, Ilango Shanmugam, Mohammed Kamruddin, Ashok K. Tyagi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

CVD grown, few walled carbon nanotubes (FWCNTs) were quasi decorated with SnO₂nanoparticles (FWCNTs-SnO₂) and its gas sensing properties were analyzed with ammonia and ethanol. At room temperature FWCNTs-SnO₂ show enhanced 'p type' gas sensing response than FWCNTs. Activation of SnO₂ at high temperatures led to systematic changes in the sensing behavior towards 'n type' response. Temperature dependent transport behavior was found to be a one dimensional variable range hopping mechanism (1D-VRH) for the FWCNTs and a 3D-VRH mechanism for the FWCNTs-SnO₂. These temperature dependent gas transport and sensing properties elucidate the hybrid nature of the nanocomposite with novel characteristics. This also implies its importance as a potential gas sensor material.

Original language	English
Pages (from-to)	1211-1215
Number of pages	5
Journal	Journal of Nanoscience and Nanotechnology
Volume	16
Issue number	1
DOIs	https://doi.org/10.1166/jnn.2016.12083
State	Published - 1 Jan 2016
Externally published	Yes

Keywords

Few-walled carbon nanotubes
Gas sensor
SnO

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abstract = "CVD grown, few walled carbon nanotubes (FWCNTs) were quasi decorated with SnO2nanoparticles (FWCNTs-SnO2) and its gas sensing properties were analyzed with ammonia and ethanol. At room temperature FWCNTs-SnO2 show enhanced 'p type' gas sensing response than FWCNTs. Activation of SnO2 at high temperatures led to systematic changes in the sensing behavior towards 'n type' response. Temperature dependent transport behavior was found to be a one dimensional variable range hopping mechanism (1D-VRH) for the FWCNTs and a 3D-VRH mechanism for the FWCNTs-SnO2. These temperature dependent gas transport and sensing properties elucidate the hybrid nature of the nanocomposite with novel characteristics. This also implies its importance as a potential gas sensor material.",

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AU - Shanmugam, Ilango

AU - Kamruddin, Mohammed

AU - Tyagi, Ashok K.

PY - 2016/1/1

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AB - CVD grown, few walled carbon nanotubes (FWCNTs) were quasi decorated with SnO2nanoparticles (FWCNTs-SnO2) and its gas sensing properties were analyzed with ammonia and ethanol. At room temperature FWCNTs-SnO2 show enhanced 'p type' gas sensing response than FWCNTs. Activation of SnO2 at high temperatures led to systematic changes in the sensing behavior towards 'n type' response. Temperature dependent transport behavior was found to be a one dimensional variable range hopping mechanism (1D-VRH) for the FWCNTs and a 3D-VRH mechanism for the FWCNTs-SnO2. These temperature dependent gas transport and sensing properties elucidate the hybrid nature of the nanocomposite with novel characteristics. This also implies its importance as a potential gas sensor material.

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Hybrid gas sensing and transport properties of few-walled CNTs decorated with discrete SnO₂ nanoparticles

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