Universität zu Köln

Kwon, Yong Jung, Kim, Hyoun Woo, Ko, Woo Chul, Choi, Heechae ORCID: 0000-0002-9390-6607, Ko, Yong-Ho and Jeong, Young Kyu (2019). Laser-engineered oxygen vacancies for improving the NO2 sensing performance of SnO2 nanowires. J. Mater. Chem. A, 7 (48). S. 27205 - 27212. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 2050-7496

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Abstract

Methods for oxygen vacancy engineering usually require high-temperature heating processes, which are substantially time-consuming. Laser irradiation techniques are a viable alternative to conventional methods, as they enable room-temperature tuning of material functionality using a simple, swift, and inexpensive process. In this report, the effects of pulsed laser irradiation on the formation of oxygen vacancies and its positive relationship with the sensing performance of SnO2 have been investigated. Based on density functional theory calculations, we suggest that the formation of laser-induced bridging oxygen defects and the resulting excess electrons on the SnO2 surface change the surface orbital structures of the Sn atoms in a manner favorable for NO2 adsorption, thus playing a key role in improving its sensing performance.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kwon, Yong Jung UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Hyoun Woo UNSPECIFIED UNSPECIFIED UNSPECIFIED Ko, Woo Chul UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Heechae UNSPECIFIED orcid.org/0000-0002-9390-6607 UNSPECIFIED Ko, Yong-Ho UNSPECIFIED UNSPECIFIED UNSPECIFIED Jeong, Young Kyu UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-123868
DOI:	10.1039/c9ta06578d
Journal or Publication Title:	J. Mater. Chem. A
Volume:	7
Number:	48
Page Range:	S. 27205 - 27212
Date:	2019
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	2050-7496
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GENERALIZED GRADIENT APPROXIMATION; TOTAL-ENERGY CALCULATIONS; CATHODOLUMINESCENCE; SURFACES Multiple languages Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/12386