skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

The complex dielectric constant ({epsilon}{sup *}) is reported for multiwalled carbon nanotubes (MWCNTs) up to 10{sup 5} Hz as a function of ac-electric field amplitudes E{sub rot} (in phase and same frequency as the measurement) and E{sub 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{sub rot} but is independent of E{sub ac}. A fast relaxation process (mode 2) is also observed, which is independent of E{sub rot} but shifts to higher frequency with increasing E{sub ac} (opposite to that of mode 1). An ac-conductivity analysis of MWCNT reveals insights on how E{sub rot} and E{sub ac} influence the dissipation.

Authors:
;  [1]
  1. Department of Physics, Order-Disorder Phenomena Laboratory, Worcester Polytechnic Institute, Worcester, Massachusetts 01609 (United States)
Publication Date:
OSTI Identifier:
21180004
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 104; Journal Issue: 11; Other Information: DOI: 10.1063/1.3035963; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARBON; DIELECTRIC MATERIALS; ELECTRIC CONDUCTIVITY; ELECTRIC FIELDS; NANOTUBES; PERMITTIVITY

Citation Formats

Basu, Rajratan, and Iannacchione, Germano S. Dielectric response of multiwalled carbon nanotubes as a function of applied ac-electric fields. United States: N. p., 2008. Web. doi:10.1063/1.3035963.
Basu, Rajratan, & Iannacchione, Germano S. Dielectric response of multiwalled carbon nanotubes as a function of applied ac-electric fields. United States. https://doi.org/10.1063/1.3035963
Basu, Rajratan, and Iannacchione, Germano S. 2008. "Dielectric response of multiwalled carbon nanotubes as a function of applied ac-electric fields". United States. https://doi.org/10.1063/1.3035963.
@article{osti_21180004,
title = {Dielectric response of multiwalled carbon nanotubes as a function of applied ac-electric fields},
author = {Basu, Rajratan and Iannacchione, Germano S},
abstractNote = {The complex dielectric constant ({epsilon}{sup *}) is reported for multiwalled carbon nanotubes (MWCNTs) up to 10{sup 5} Hz as a function of ac-electric field amplitudes E{sub rot} (in phase and same frequency as the measurement) and E{sub 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{sub rot} but is independent of E{sub ac}. A fast relaxation process (mode 2) is also observed, which is independent of E{sub rot} but shifts to higher frequency with increasing E{sub ac} (opposite to that of mode 1). An ac-conductivity analysis of MWCNT reveals insights on how E{sub rot} and E{sub ac} influence the dissipation.},
doi = {10.1063/1.3035963},
url = {https://www.osti.gov/biblio/21180004}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 11,
volume = 104,
place = {United States},
year = {Mon Dec 01 00:00:00 EST 2008},
month = {Mon Dec 01 00:00:00 EST 2008}
}