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

Access to Document

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

Cite this

@article{628d49a7e5e44ccbabbd9f4435da8035,

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",

month = oct,

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

language = "English",

volume = "28",

journal = "Chinese Physics Letters",

issn = "0256-307X",

publisher = "IOP Publishing Ltd.",

number = "10",

}

TY - JOUR

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 - http://www.scopus.com/inward/record.url?scp=80053960741&partnerID=8YFLogxK

U2 - 10.1088/0256-307X/28/10/107701

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

Abstract

Access to Document

Other files and links

Fingerprint

Cite this