Szczegóły publikacji
Opis bibliograficzny
$TiO_2/SnO_2$ and $TiO_2/CuO$ thin film nano-heterostructures as gas sensors / Wojciech MAZIARZ // Applied Surface Science ; ISSN 0169-4332. — Tytuł poprz.: Applications of Surface Science. — 2019 — vol. 480, s. 361–370. — Bibliogr. s. 369–370, Abstr. — Publikacja dostępna online od: 2019-02-16
Autor
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 120590 |
|---|---|
| Data dodania do BaDAP | 2019-03-19 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.apsusc.2019.02.139 |
| Rok publikacji | 2019 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Applied Surface Science |
Abstract
The nano-heterostructures of TiO 2 /SnO 2 and TiO 2 /CuO thin films have been investigated towards NO 2 detection. Thin films have been deposited by reactive magnetron sputtering of metallic targets in Ar + O 2 atmosphere. The properties of samples have been characterized by means of X-ray diffraction in grazing incidence GIXRD, X-ray reflectivity XRR, scanning electron microscopy SEM, optical methods and X-ray photoelectron spectroscopy XPS. It has been shown the SnO 2 and CuO surface is well developed, with uniformly dispersed polycrystalline nanoparticles of TiO 2 . The addition of TiO 2 thin layer increased the response of SnO 2 nanostructure towards NO 2 . A very high resistance change ~4500 has been demonstrated for TiO 2 /SnO 2 at 150 °C for 4 ppm of NO 2 , while for the SnO 2 sensor the resistance change has been ~2300. The TiO 2 /SnO 2 sensor responses to CO and H 2 reducing gases were significantly lower. Such extremely good sensing properties of the n-n heterostructure to NO 2 may be assigned to the formed interfaces and higher surface-to-volume ratio. However, TiO 2 /CuO n-p heterostructures reveal much smaller responses to NO 2 , what may be attributed to the effect of charge compensation. © 2019 Elsevier B.V.
