Temperature-dependent charge transport in TiO2-multiwalled carbon nanotube composites

Seul Gi Seo; Woo Hyun Nam; Young Soo Lim; Won Seon Seo; Yong Soo Cho; Jeong Yong Lee

doi:10.1016/j.carbon.2013.10.060

Temperature-dependent charge transport in TiO₂-multiwalled carbon nanotube composites

Seul Gi Seo, Woo Hyun Nam, Young Soo Lim, Won Seon Seo, Yong Soo Cho, Jeong Yong Lee

Department of Materials Science and Engineering

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

6 Citations (Scopus)

Abstract

Charge transport properties of TiO₂-multiwalled carbon nanotube (MWCNT) composites were investigated. The TiO₂-MWCNT composites were fabricated by spark plasma sintering of a mixture of TiO₂ nanoparticles and MWCNTs. Temperature-dependent electrical conductivities of the composites reveal that the percolation threshold for the MWCNT network is affected by temperature, and that the activation process for electron hopping is also influenced by the percolation. Based on this interdependence, an integrated charge transport model, including both the effects of the percolation and the electron hopping, is proposed for this system.

Original language	English
Pages (from-to)	688-693
Number of pages	6
Journal	Carbon
Volume	67
DOIs	https://doi.org/10.1016/j.carbon.2013.10.060
Publication status	Published - 2014

Bibliographical note

Funding Information:
This research was supported by Korea Institute of Ceramic Engineering and Technology and also supported by Nano·Material Technology Development Program ( 2011-0030147 ) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology, Republic of Korea .

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)

Access to Document

10.1016/j.carbon.2013.10.060

Cite this

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title = "Temperature-dependent charge transport in TiO2-multiwalled carbon nanotube composites",

abstract = "Charge transport properties of TiO2-multiwalled carbon nanotube (MWCNT) composites were investigated. The TiO2-MWCNT composites were fabricated by spark plasma sintering of a mixture of TiO2 nanoparticles and MWCNTs. Temperature-dependent electrical conductivities of the composites reveal that the percolation threshold for the MWCNT network is affected by temperature, and that the activation process for electron hopping is also influenced by the percolation. Based on this interdependence, an integrated charge transport model, including both the effects of the percolation and the electron hopping, is proposed for this system.",

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note = "Funding Information: This research was supported by Korea Institute of Ceramic Engineering and Technology and also supported by Nano·Material Technology Development Program ( 2011-0030147 ) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology, Republic of Korea .",

year = "2014",

doi = "10.1016/j.carbon.2013.10.060",

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volume = "67",

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T1 - Temperature-dependent charge transport in TiO2-multiwalled carbon nanotube composites

AU - Seo, Seul Gi

AU - Nam, Woo Hyun

AU - Lim, Young Soo

AU - Seo, Won Seon

AU - Cho, Yong Soo

AU - Lee, Jeong Yong

N1 - Funding Information: This research was supported by Korea Institute of Ceramic Engineering and Technology and also supported by Nano·Material Technology Development Program ( 2011-0030147 ) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology, Republic of Korea .

PY - 2014

Y1 - 2014

N2 - Charge transport properties of TiO2-multiwalled carbon nanotube (MWCNT) composites were investigated. The TiO2-MWCNT composites were fabricated by spark plasma sintering of a mixture of TiO2 nanoparticles and MWCNTs. Temperature-dependent electrical conductivities of the composites reveal that the percolation threshold for the MWCNT network is affected by temperature, and that the activation process for electron hopping is also influenced by the percolation. Based on this interdependence, an integrated charge transport model, including both the effects of the percolation and the electron hopping, is proposed for this system.

AB - Charge transport properties of TiO2-multiwalled carbon nanotube (MWCNT) composites were investigated. The TiO2-MWCNT composites were fabricated by spark plasma sintering of a mixture of TiO2 nanoparticles and MWCNTs. Temperature-dependent electrical conductivities of the composites reveal that the percolation threshold for the MWCNT network is affected by temperature, and that the activation process for electron hopping is also influenced by the percolation. Based on this interdependence, an integrated charge transport model, including both the effects of the percolation and the electron hopping, is proposed for this system.

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