Mechanistic insights into ethanol sensing by Pt-decorated WO3 nanowires

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F26%3A0200139" target="_blank" >RIV/00216305:26620/26:0200139 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0925400525020647?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0925400525020647?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.snb.2025.139287" target="_blank" >10.1016/j.snb.2025.139287</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mechanistic insights into ethanol sensing by Pt-decorated WO3 nanowires

Popis výsledku v původním jazyce

This study investigates the fabrication and gas-sensing properties of Pt-decorated tungsten trioxide (WO3) nanowires (NWs) for chemiresistor applications. Single-standing WO3 and Pt/WO3 NWs were synthesized via aerosol-assisted chemical vapor deposition (AACVD) and assembled onto sensor chips using dielectrophoresis. Structural and morphological characterization was conducted using scanning electron microscopy (SEM), highresolution transmission electron microscopy (HR-TEM), and energy-dispersive X-ray spectroscopy (EDX). Sensor performance was evaluated through resistance measurements under varying ethanol concentrations and operating temperatures. Pt-decorated WO3 NWs demonstrated a significantly enhanced response compared to pristine WO3 NWs. It is also shown that Pt decoration resulted in an increased baseline resistance, consistent with electronic sensitization effects. Notably, Pt-functionalized sensors displayed a substantial response even at 100 degrees C, indicating promise for low-temperature operation. To elucidate the surface chemistry and electronic interactions during ethanol detection, near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) was employed. Based on this study, the superior sensing performance is attributed to the catalytic spill-over effect of Pt nanoparticles, charge transfer interactions, and the generation of surface oxygen vacancies. These findings offer valuable insights into the sensing mechanisms of noble metal-decorated metal oxide chemiresistors toward volatile organic compounds.

Název v anglickém jazyce

Mechanistic insights into ethanol sensing by Pt-decorated WO3 nanowires

Popis výsledku anglicky

This study investigates the fabrication and gas-sensing properties of Pt-decorated tungsten trioxide (WO3) nanowires (NWs) for chemiresistor applications. Single-standing WO3 and Pt/WO3 NWs were synthesized via aerosol-assisted chemical vapor deposition (AACVD) and assembled onto sensor chips using dielectrophoresis. Structural and morphological characterization was conducted using scanning electron microscopy (SEM), highresolution transmission electron microscopy (HR-TEM), and energy-dispersive X-ray spectroscopy (EDX). Sensor performance was evaluated through resistance measurements under varying ethanol concentrations and operating temperatures. Pt-decorated WO3 NWs demonstrated a significantly enhanced response compared to pristine WO3 NWs. It is also shown that Pt decoration resulted in an increased baseline resistance, consistent with electronic sensitization effects. Notably, Pt-functionalized sensors displayed a substantial response even at 100 degrees C, indicating promise for low-temperature operation. To elucidate the surface chemistry and electronic interactions during ethanol detection, near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) was employed. Based on this study, the superior sensing performance is attributed to the catalytic spill-over effect of Pt nanoparticles, charge transfer interactions, and the generation of surface oxygen vacancies. These findings offer valuable insights into the sensing mechanisms of noble metal-decorated metal oxide chemiresistors toward volatile organic compounds.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

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

2026

Kód důvěrnosti údajů

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

Název periodika

SENSORS AND ACTUATORS B-CHEMICAL

ISSN

—

e-ISSN

0925-4005

Svazek periodika

—

Číslo periodika v rámci svazku

451

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

—

Kód UT WoS článku

001642266100001

EID výsledku v databázi Scopus

2-s2.0-105024539330