Universität zu Köln

Pan, Jun, Song, Xuefeng, Zhang, Jun ORCID: 0000-0002-9831-6796, Shen, Hao ORCID: 0000-0001-5098-7948 and Xiong, Qihua ORCID: 0000-0002-2555-4363 (2011). Switchable Wettability in SnO2 Nanowires and SnO2@SnO2 Heterostructures. J. Phys. Chem. C, 115 (45). S. 22225 - 22232. WASHINGTON: AMER CHEMICAL SOC. ISSN 1932-7447

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Abstract

We present here the synthesis of SnO2 nanowires SnO2@SnO2 and SnO2@SnO2@SiOx heterostructures via the chemical vapor deposition (CVD) method. Surface wettability could be modulated from superhydrophilic to superhydrophobic by changing both chemical composition and the geometrical architecture of nanoheterostructures. The random SnO2 nanowires with a contact angle of 3 degrees presented a superhydrophilic property. The contact angle of SnO2@SnO2 heterostructures synthesized by a two-step CVD process increased to 133 degrees. The corresponding contact angle of SnO2@SnO2@SiOx heterostructures was 155.8 degrees. Switchable surface wettability of the SnO2@SnO2@SiOx heterostructure was observed by alternation of UV irradiation, dark storage, and O-2 annealing, indicating that geometric microstructure was the major determinant in the switchable wettability from superhydrophilic to superhydrophobic. The switchable surface wettability of SnO2 nanostructures may develop the significant potential for industrial coating and self-cleaning system.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pan, Jun UNSPECIFIED UNSPECIFIED UNSPECIFIED Song, Xuefeng UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhang, Jun UNSPECIFIED orcid.org/0000-0002-9831-6796 UNSPECIFIED Shen, Hao UNSPECIFIED orcid.org/0000-0001-5098-7948 UNSPECIFIED Xiong, Qihua UNSPECIFIED orcid.org/0000-0002-2555-4363 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-485310
DOI:	10.1021/jp207376t
Journal or Publication Title:	J. Phys. Chem. C
Volume:	115
Number:	45
Page Range:	S. 22225 - 22232
Date:	2011
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1932-7447
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language OXIDE THIN-FILMS; X-RAY; SURFACES; SUPERHYDROPHOBICITY; ZNO; GROWTH; HYDROPHILICITY; SPECTROSCOPY; DEPOSITION; WATER Multiple languages Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48531