Dielectric response of multiwalled carbon nanotubes as a function of applied ac-electric fields

被引：24

作者：

Basu, Rajratan ^{[1
]}

Iannacchione, Germano S. ^{[1
]}

机构：

[1] Worcester Polytech Inst, Dept Phys, Order Disorder Phenomena Lab, Worcester, MA 01609 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 104卷 / 11期

关键词：

D O I：

10.1063/1.3035963

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The complex dielectric constant (epsilon*) is reported for multiwalled carbon nanotubes (MWCNTs) up to 10(5) Hz as a function of ac-electric field amplitudes E-rot (in phase and same frequency as the measurement) and E-ac (different phase and fixed frequency with respect to the measurement). A slow relaxation process (mode 1) is observed, which shifts to higher frequency with increasing E-rot but is independent of E-ac. A fast relaxation process (mode 2) is also observed, which is independent of E-rot but shifts to higher frequency with increasing E-ac (opposite to that of mode 1). An ac-conductivity analysis of MWCNT reveals insights on how E-rot and E-ac influence the dissipation. (c) 2008 American Institute of Physics. [DOI: 10.1063/1.3035963]

引用

页数：4

共 29 条

[1] Electrical conductivity and dielectric properties of multiwalled carbon nanotube and alumina composites [J].

Ahmad, Kaleem ;

Pan, Wei ;

Shi, Sui-Lin .

APPLIED PHYSICS LETTERS, 2006, 89 (13)

[2]

[Anonymous], 2003, RELAXATION PHENOMENA

[3] High-resolution dielectric spectroscopy and electric-field dependence of carbon allotropes including multiwall and single-wall nanotubes [J].

Basu, Rajratan ;

Iannacchione, Germano S. .

APPLIED PHYSICS LETTERS, 2008, 92 (05)

[4] Carbon nanotubes - the route toward applications [J].

Baughman, RH ;

Zakhidov, AA ;

de Heer, WA .

SCIENCE, 2002, 297 (5582) :787-792

[5] A modified Schering bridge for measurement of the dielectric parameters of a material and the capacitance of a capacitive transducer [J].

Bera, SC ;

Chattopadhyay, S .

MEASUREMENT, 2003, 33 (01) :3-7

[6] Nanotubes for electronics [J].

Collins, PG ;

Avouris, P .

SCIENTIFIC AMERICAN, 2000, 283 (06) :62-+

[7] Liquid crystal-carbon nanotube dispersions [J].

Dierking, I ;

Scalia, G ;

Morales, P .

JOURNAL OF APPLIED PHYSICS, 2005, 97 (04)

[8] CAPACITANCE BRIDGE FOR LOW-TEMPERATURE, HIGH-RESOLUTION DIELECTRIC MEASUREMENTS [J].

FOOTE, MC ;

ANDERSON, AC .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1987, 58 (01) :130-132

[9]

GUO X, 2006, P 1 IEEE INT C NAN M

[10]

Hill N. E., 1969, Dielectric Properties and Molecular Behaviour

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