Electrical properties of semiconductor/conductor composites: Polypyrrole-coated tungsten microparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F25%3A63594738" target="_blank" >RIV/70883521:28610/25:63594738 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/25:10506763 RIV/60461373:22810/25:43933005

Výsledek na webu

<a href="https://www.mdpi.com/2504-477X/9/3/98" target="_blank" >https://www.mdpi.com/2504-477X/9/3/98</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/jcs9030098" target="_blank" >10.3390/jcs9030098</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrical properties of semiconductor/conductor composites: Polypyrrole-coated tungsten microparticles

Popis výsledku v původním jazyce

Tungsten microparticles were coated with globular or nanotubular polypyrrole in situ during the oxidation of pyrrole in aqueous medium with ammonium peroxydisulfate or iron(III) chloride, respectively. The resulting core–shell composites with various contents of tungsten were obtained as powders composed of metal particles embedded in a semiconducting polymer matrix. The coating of tungsten with polypyrrole was analysed by FTIR and Raman spectroscopies. The resistivity of composite powders was determined by the four-point van der Pauw method as a function of pressure applied up to 10 MPa. The degree of compression was also recorded and its relation to electrical properties is discussed on the basis of the percolation concept. The electrical properties of composites are afforded by polypyrrole matrix and they are independent of tungsten content. As the conducting tungsten particles are separated by polypyrrole shells, they cannot produce conducting pathways and behave similarly as a nonconducting filler.

Název v anglickém jazyce

Electrical properties of semiconductor/conductor composites: Polypyrrole-coated tungsten microparticles

Popis výsledku anglicky

Tungsten microparticles were coated with globular or nanotubular polypyrrole in situ during the oxidation of pyrrole in aqueous medium with ammonium peroxydisulfate or iron(III) chloride, respectively. The resulting core–shell composites with various contents of tungsten were obtained as powders composed of metal particles embedded in a semiconducting polymer matrix. The coating of tungsten with polypyrrole was analysed by FTIR and Raman spectroscopies. The resistivity of composite powders was determined by the four-point van der Pauw method as a function of pressure applied up to 10 MPa. The degree of compression was also recorded and its relation to electrical properties is discussed on the basis of the percolation concept. The electrical properties of composites are afforded by polypyrrole matrix and they are independent of tungsten content. As the conducting tungsten particles are separated by polypyrrole shells, they cannot produce conducting pathways and behave similarly as a nonconducting filler.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/TK03030157" target="_blank" >TK03030157: Další generace all-solid-state Li-ion baterií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Composites Science

ISSN

2504-477X

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

15

Strana od-do

nestránkováno

Kód UT WoS článku

001453215500001

EID výsledku v databázi Scopus

2-s2.0-105001372591