MWCNTs/SiO2 composite system: Carrier transmission, twin-percolation and dielectric properties

Wen Qiang Cao; Ming Ming Lu; Bo Wen; Yuan Lu Chen; Hong Bo Li; Jie Yuan; Mao Sheng Cao

doi:10.1088/0256-307X/28/10/107701

MWCNTs/SiO₂ composite system: Carrier transmission, twin-percolation and dielectric properties

Wen Qiang Cao
, Ming Ming Lu
, Bo Wen
, Yuan Lu Chen
, Hong Bo Li
, Jie Yuan^*
, Mao Sheng Cao

^*Corresponding author for this work

School of Material Science and Engineering

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

10 Citations (Scopus)

Abstract

We synthesize composite systems of multi-wall carbon nanotubes (MWCNTs)/SiO₂ by using the sol-gel method. The dielectric properties of the systems with different-concentration MWCNTs are studied. In our MWCNTs/SiO₂ inorganic systems, the twin-percolation phenomenon exists when the concentrations of MWCNTs are 5-10% and 15-20%. The permittivity and conductivity have jumping changes. The twin-percolation phenomenon is attributed to the special transfer mechanism of MWCNTs in the system, determined by hopping and migrating electrons. Variations of dielectric properties and conductance of the MWCNTs/SiO₂ systems are conformed to the percolation theory. The special percolation phenomenon and electric properties of MWCNTs/SiO₂ can help us comprehend the conductivity mechanism of the MWCNTs/SiO₂ systems effectively, and promote the development of a high performance function composite system.

Original language	English
Article number	107701
Journal	Chinese Physics Letters
Volume	28
Issue number	10
DOIs	https://doi.org/10.1088/0256-307X/28/10/107701
Publication status	Published - Oct 2011

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title = "MWCNTs/SiO2 composite system: Carrier transmission, twin-percolation and dielectric properties",

abstract = "We synthesize composite systems of multi-wall carbon nanotubes (MWCNTs)/SiO2 by using the sol-gel method. The dielectric properties of the systems with different-concentration MWCNTs are studied. In our MWCNTs/SiO2 inorganic systems, the twin-percolation phenomenon exists when the concentrations of MWCNTs are 5-10\% and 15-20\%. The permittivity and conductivity have jumping changes. The twin-percolation phenomenon is attributed to the special transfer mechanism of MWCNTs in the system, determined by hopping and migrating electrons. Variations of dielectric properties and conductance of the MWCNTs/SiO2 systems are conformed to the percolation theory. The special percolation phenomenon and electric properties of MWCNTs/SiO2 can help us comprehend the conductivity mechanism of the MWCNTs/SiO2 systems effectively, and promote the development of a high performance function composite system.",

author = "Cao, \{Wen Qiang\} and Lu, \{Ming Ming\} and Bo Wen and Chen, \{Yuan Lu\} and Li, \{Hong Bo\} and Jie Yuan and Cao, \{Mao Sheng\}",

year = "2011",

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doi = "10.1088/0256-307X/28/10/107701",

language = "English",

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journal = "Chinese Physics Letters",

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T1 - MWCNTs/SiO2 composite system

T2 - Carrier transmission, twin-percolation and dielectric properties

AU - Cao, Wen Qiang

AU - Lu, Ming Ming

AU - Wen, Bo

AU - Chen, Yuan Lu

AU - Li, Hong Bo

AU - Yuan, Jie

AU - Cao, Mao Sheng

PY - 2011/10

Y1 - 2011/10

N2 - We synthesize composite systems of multi-wall carbon nanotubes (MWCNTs)/SiO2 by using the sol-gel method. The dielectric properties of the systems with different-concentration MWCNTs are studied. In our MWCNTs/SiO2 inorganic systems, the twin-percolation phenomenon exists when the concentrations of MWCNTs are 5-10% and 15-20%. The permittivity and conductivity have jumping changes. The twin-percolation phenomenon is attributed to the special transfer mechanism of MWCNTs in the system, determined by hopping and migrating electrons. Variations of dielectric properties and conductance of the MWCNTs/SiO2 systems are conformed to the percolation theory. The special percolation phenomenon and electric properties of MWCNTs/SiO2 can help us comprehend the conductivity mechanism of the MWCNTs/SiO2 systems effectively, and promote the development of a high performance function composite system.

AB - We synthesize composite systems of multi-wall carbon nanotubes (MWCNTs)/SiO2 by using the sol-gel method. The dielectric properties of the systems with different-concentration MWCNTs are studied. In our MWCNTs/SiO2 inorganic systems, the twin-percolation phenomenon exists when the concentrations of MWCNTs are 5-10% and 15-20%. The permittivity and conductivity have jumping changes. The twin-percolation phenomenon is attributed to the special transfer mechanism of MWCNTs in the system, determined by hopping and migrating electrons. Variations of dielectric properties and conductance of the MWCNTs/SiO2 systems are conformed to the percolation theory. The special percolation phenomenon and electric properties of MWCNTs/SiO2 can help us comprehend the conductivity mechanism of the MWCNTs/SiO2 systems effectively, and promote the development of a high performance function composite system.

UR - https://www.scopus.com/pages/publications/80053960741

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DO - 10.1088/0256-307X/28/10/107701

M3 - Article

AN - SCOPUS:80053960741

SN - 0256-307X

VL - 28

JO - Chinese Physics Letters

JF - Chinese Physics Letters

IS - 10

M1 - 107701

ER -

MWCNTs/SiO₂ composite system: Carrier transmission, twin-percolation and dielectric properties

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