Author, as appears in the article.: Annanouch, Fatima E; Haddi, Zouhair; Vallejos, Stella; Umek, Polona; Guttmann, Peter; Bittencourt, Carla; Llobet, Eduard
Department: Enginyeria Electrònica, Elèctrica i Automàtica
URV's Author/s: Annanouch, Fatima Ezahra / Llobet Valero, Eduard
Keywords: Tungsten compounds Sulfur compounds P-n heterojunctions Oxide minerals Nanoparticles Nanoneedles Nanocrystalline materials Moderate temperature Low detection limit Hybrid nanomaterials Hybrid materials Heterojunctions Gas sensor Gas sensing electrodes Gas detectors Functionalizations Functionalization Cost effectiveness Copper oxides Copper oxide nanoparticles Composition analysis Chemical vapor deposition Chemical sensors Aerosols Aerosol-assisted cvd Aerosol-assisted chemical vapor depositions nanoneedles gas sensor functionalization aerosol-assisted cvd
Abstract: A gas-sensitive hybrid material consisting of Cu2O nanoparticle-decorated WO3 nanoneedles is successfully grown for the first time in a single step via aerosol-assisted chemical vapor deposition. Morphological, structural, and composition analyses show that our method is effective for growing single-crystalline, n-type WO3 nanoneedles decorated with p-type Cu2O nanoparticles at moderate temperatures (i.e., 380 °C), with cost effectiveness and short fabrication times, directly onto microhot plate transducer arrays with the view of obtaining gas sensors. The gas-sensing studies performed show that this hybrid nanomaterial has excellent sensitivity and selectivity to hydrogen sulfide (7-fold increase in response compared with that of pristine WO3 nanoneedles) and a low detection limit (below 300 ppb of H2S), together with unprecedented fast response times (2 s) and high immunity to changes in the background humidity. These superior properties arise because of the multiple p-n heterojunctions created at the nanoscale in our hybrid nanomaterial. © 2015 American Chemical Society.
Thematic Areas: Química Nanoscience and nanotechnology Nanoscience & nanotechnology Medicine (miscellaneous) Medicina veterinaria Medicina ii Medicina i Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) Materiais Interdisciplinar General materials science Farmacia Engenharias iv Engenharias iii Engenharias ii Economia Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Biotecnología Biodiversidade Astronomia / física Arquitetura, urbanismo e design
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: fatimaezahra.annanouch@urv.cat eduard.llobet@urv.cat
Author identifier: 0000-0003-1533-6482 0000-0001-6164-4342
Record's date: 2024-09-07
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://pubs.acs.org/doi/abs/10.1021/acsami.5b00411
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Acs Applied Materials & Interfaces. 7 (12): 6842-6851
APA: Annanouch, Fatima E; Haddi, Zouhair; Vallejos, Stella; Umek, Polona; Guttmann, Peter; Bittencourt, Carla; Llobet, Eduard (2015). Aerosol-assisted CVD-grown WO3 nanoneedles decorated with copper oxide nanoparticles for the selective and humidity-resilient detection of H2S. Acs Applied Materials & Interfaces, 7(12), 6842-6851. DOI: 10.1021/acsami.5b00411
Article's DOI: 10.1021/acsami.5b00411
Entity: Universitat Rovira i Virgili
Journal publication year: 2015
Publication Type: Journal Publications
Repositori URV