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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

<a href="/cs/project/GA22-14886S" target="_blank" >GA22-14886S: Pokročilý chemorezistor pro detekci plynů založený na jediné 1D-nanostruktuře (1D-SENS)</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

Engineering Proceedings

ISBN

—

ISSN

2673-4591

e-ISSN

—

Počet stran výsledku

6

Strana od-do

1-6

Název nakladatele

MDPI

Místo vydání

neuveden

Místo konání akce

online

Datum konání akce

16. 9. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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