Multi-wall carbon nanotube networks as potential resistive gas sensors for organic vapor detection

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F11%3A10018844" target="_blank" >RIV/70883521:28110/11:10018844 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985874:_____/11:00359583 RIV/70883521:28150/11:10018844

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.carbon.2011.02.020" target="_blank" >http://dx.doi.org/10.1016/j.carbon.2011.02.020</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.carbon.2011.02.020" target="_blank" >10.1016/j.carbon.2011.02.020</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Multi-wall carbon nanotube networks as potential resistive gas sensors for organic vapor detection

Popis výsledku v původním jazyce

The sensitivity of multi-wall carbon nanotube (MWCNT) networks of randomly entangled pure nanotubes and those oxidized with acidic KMnO4 to various organic solvent vapors (iso-pentane, diethyl ether, acetone and methanol) has been investigated by resistance measurements. The solvents had different polarities given by Hansen solubility parameters and different volume fractions of saturated vapors defined by the vapor pressure. The results show that the network electrical resistance increases when exposedto organic solvent vapors, and a reversible reaction is observed when the network is removed from the vapors. The reaction with KMnO4 increases oxygen content on the nanotube surface and causes lower porosity of MWCNT network as well as higher electrical resistance, which improves the network selectivity to polar solvents. The investigated MWCNT networks could be potentially used as sensing elements for sensitive and selective organic vapor switches.

Název v anglickém jazyce

Multi-wall carbon nanotube networks as potential resistive gas sensors for organic vapor detection

Popis výsledku anglicky

The sensitivity of multi-wall carbon nanotube (MWCNT) networks of randomly entangled pure nanotubes and those oxidized with acidic KMnO4 to various organic solvent vapors (iso-pentane, diethyl ether, acetone and methanol) has been investigated by resistance measurements. The solvents had different polarities given by Hansen solubility parameters and different volume fractions of saturated vapors defined by the vapor pressure. The results show that the network electrical resistance increases when exposedto organic solvent vapors, and a reversible reaction is observed when the network is removed from the vapors. The reaction with KMnO4 increases oxygen content on the nanotube surface and causes lower porosity of MWCNT network as well as higher electrical resistance, which improves the network selectivity to polar solvents. The investigated MWCNT networks could be potentially used as sensing elements for sensitive and selective organic vapor switches.

Druh

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

CEP obor

JB - Senzory, čidla, měření a regulace

OECD FORD obor

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Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Carbon

ISSN

0008-6223

e-ISSN

—

Svazek periodika

49

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

2499-2507

Kód UT WoS článku

000289663100037

EID výsledku v databázi Scopus

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