Broad-band conductivity and dielectric spectroscopy of composites of multiwalled carbon nanotubes and poly(ethylene terephthalate) around their low percolation threshold

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00391942" target="_blank" >RIV/68378271:_____/13:00391942 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/0957-4484/24/5/055707" target="_blank" >http://dx.doi.org/10.1088/0957-4484/24/5/055707</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0957-4484/24/5/055707" target="_blank" >10.1088/0957-4484/24/5/055707</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Broad-band conductivity and dielectric spectroscopy of composites of multiwalled carbon nanotubes and poly(ethylene terephthalate) around their low percolation threshold

Popis výsledku v původním jazyce

Composites of multiwalled carbon nanotubes with poly(ethylene terephthalate)(PET?MWCNT) with up to 3 vol% MWCNTs were prepared and characterized by broad-band AC conductivity and dielectric spectroscopy up to the infrared range using several techniques.A very low electrical percolation threshold of 0.07 vol% MWCNTs was revealed from the low-frequency conductivity plateau as well as from DC conductivity, whose values show the same critical power dependence on MWCNT concentration with the exponent t=4.3.The temperature dependence down to 5 K has shown semiconductor behaviour with a concentration-independent but weakly temperature-dependent small activation energy of 3 meV. The behaviour is compatible with the previously suggested fluctuation-induced tunnelling conductivity model through a thin ( 1 nm) polymer contact layer among the adjacent MWCNTs within percolated clusters.

Název v anglickém jazyce

Broad-band conductivity and dielectric spectroscopy of composites of multiwalled carbon nanotubes and poly(ethylene terephthalate) around their low percolation threshold

Popis výsledku anglicky

Composites of multiwalled carbon nanotubes with poly(ethylene terephthalate)(PET?MWCNT) with up to 3 vol% MWCNTs were prepared and characterized by broad-band AC conductivity and dielectric spectroscopy up to the infrared range using several techniques.A very low electrical percolation threshold of 0.07 vol% MWCNTs was revealed from the low-frequency conductivity plateau as well as from DC conductivity, whose values show the same critical power dependence on MWCNT concentration with the exponent t=4.3.The temperature dependence down to 5 K has shown semiconductor behaviour with a concentration-independent but weakly temperature-dependent small activation energy of 3 meV. The behaviour is compatible with the previously suggested fluctuation-induced tunnelling conductivity model through a thin ( 1 nm) polymer contact layer among the adjacent MWCNTs within percolated clusters.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nanotechnology

ISSN

0957-4484

e-ISSN

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Svazek periodika

24

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

"055707-1"-"055707-9"

Kód UT WoS článku

000313568700024

EID výsledku v databázi Scopus

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