Electrical characterization of hydrothermally synthesized manganese dioxide nanowires with regard to NO2 adsorption/desorption thermodynamics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F23%3APU149303" target="_blank" >RIV/00216305:26620/23:PU149303 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2673-4591/48/1/35" target="_blank" >https://www.mdpi.com/2673-4591/48/1/35</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/CSAC2023-14883" target="_blank" >10.3390/CSAC2023-14883</a>

Result language

angličtina

Original language name

Electrical characterization of hydrothermally synthesized manganese dioxide nanowires with regard to NO2 adsorption/desorption thermodynamics

Original language description

Single nanowires (NWs) are promising structures to improve sensitivity and selectivity of metal-oxide (MOX) gas sensors. Self-made MnO2 nanowires were hydrothermally synthesized and electrically characterized in different ambient. The nanowires were approximately 4-10 µm long and about 100 nm in diameter. The nanowires were suspended in water and deposited on two parallel gold electrodes having separation distance of 4 µm. Single nanowires were aligned perpendicularly across the gold electrodes by dielectrophoresis (DEP) technique. The number of the NWs was determined by scanning electron microscopy. The conductivity was measured in synthetic air, nitrogen, and in NO2 ambient. The tests consisted in measuring resistivity of the NWs in relation to temperature of the bottom-placed heater under the chip. The temperature went from room temperature up to 300°C. The resistivity changes were observed accounting for oxygen reduction on the NWs surface as the electrons were moving from the NWs to the oxygen. The resistivity was explored at a constant current arrangement test. Based on resistivity changes, electrical properties, such as activation energy and a type of semiconductor (p-type in case of MnO2), were evaluated. Mott-Schottky analysis was applied to estimate acceptor concentration, as well as NWs permittivity.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

21001 - Nano-materials (production and properties)

Project

<a href="/en/project/GA22-14886S" target="_blank" >GA22-14886S: Advanced chemoresistive device based on gas sensitive single-1D nanostructures (1D-SENS)</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Article name in the collection

Engineering Proceedings

ISBN

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ISSN

2673-4591

e-ISSN

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Number of pages

6

Pages from-to

1-6

Publisher name

MDPI

Place of publication

neuveden

Event location

online

Event date

Sep 16, 2023

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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