WO3/CuWO4 nanocomposite thin films for humidity resilient acetone gas sensing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F25%3A43976717" target="_blank" >RIV/49777513:23520/25:43976717 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.apsadv.2025.100894" target="_blank" >https://doi.org/10.1016/j.apsadv.2025.100894</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apsadv.2025.100894" target="_blank" >10.1016/j.apsadv.2025.100894</a>

Jazyk výsledku

angličtina

Název v původním jazyce

WO3/CuWO4 nanocomposite thin films for humidity resilient acetone gas sensing

Popis výsledku v původním jazyce

We demonstrate a high-performing and selective acetone gas sensor based on WO3/CuWO4 nanocomposites produced by sequentially sputter-deposited WO3 thin films and CuO nanoparticles, engineered to reduce the humidity interference. By optimizing deposition order and layer thicknesses, we harnessed synergistic p-n/n-n heterojunctions and the formation of a catalytic CuWO4 ternary phase. The best performing configuration (20 nm of tungsten oxide film on top of nanoparticles) exhibits a high response (S = 23) to 10 ppm acetone at 300 °C, fast response in dry/humid conditions (38 s/58 s), and low detection limit (0.6 ppm). More importantly, the sensor exhibited &gt; 95 % retention of its response in 90 % relative humidity compared to a loss of &gt;50 % for pristine WO3. The reduced humidity interference is assigned to heterojunction formation at the WO3/CuWO4 interface, Lewis acid sites that allow for acetone selective adsorption, and bulk-dominated conduction. This noble-metal-free acetone sensor overcomes a known shortcoming of metal oxide-based sensors, enabling accurate acetone detection in humid environments for breath-based disease diagnosis (e.g., diabetes) and industrial safety monitoring.

Název v anglickém jazyce

WO3/CuWO4 nanocomposite thin films for humidity resilient acetone gas sensing

Popis výsledku anglicky

We demonstrate a high-performing and selective acetone gas sensor based on WO3/CuWO4 nanocomposites produced by sequentially sputter-deposited WO3 thin films and CuO nanoparticles, engineered to reduce the humidity interference. By optimizing deposition order and layer thicknesses, we harnessed synergistic p-n/n-n heterojunctions and the formation of a catalytic CuWO4 ternary phase. The best performing configuration (20 nm of tungsten oxide film on top of nanoparticles) exhibits a high response (S = 23) to 10 ppm acetone at 300 °C, fast response in dry/humid conditions (38 s/58 s), and low detection limit (0.6 ppm). More importantly, the sensor exhibited &gt; 95 % retention of its response in 90 % relative humidity compared to a loss of &gt;50 % for pristine WO3. The reduced humidity interference is assigned to heterojunction formation at the WO3/CuWO4 interface, Lewis acid sites that allow for acetone selective adsorption, and bulk-dominated conduction. This noble-metal-free acetone sensor overcomes a known shortcoming of metal oxide-based sensors, enabling accurate acetone detection in humid environments for breath-based disease diagnosis (e.g., diabetes) and industrial safety monitoring.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/EH22_008%2F0004572" target="_blank" >EH22_008/0004572: Kvantové materiály pro aplikace v udržitelných technologiích</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Applied Surface Science Advances

ISSN

2666-5239

e-ISSN

2666-5239

Svazek periodika

30

Číslo periodika v rámci svazku

DEC 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

nestránkováno

Kód UT WoS článku

001616253500002

EID výsledku v databázi Scopus

2-s2.0-105021026482