Document Detail


Encapsuled nanoreactors (Au@SnO(2)): a new sensing material for chemical sensors.
MedLine Citation:
PMID:  23295974     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
New Au@SnO(2) yolk-shell nanospheres have been successfully synthesized by using Au@SiO(2) nanospheres as sacrificial templates. This process is environmentally friendly and is based on hydrothermal shell-by-shell deposition of polycrystalline SnO(2) on spheriform Au@SiO(2) nanotemplates. Au nanoparticles can be impregnated into the SnO(2) nanospheres and the nanospheres show outer diameters of 110 nm and thicknesses of 15 nm. The possible growth model of the nanospheres is proposed. The gas sensing properties of the Au@SnO(2) yolk-shell nanospheres were researched and compared with that of the hollow SnO(2) nanospheres. The former shows lower operating temperature (210 °C), lower detection limit (5 ppm), faster response (0.3 s) and better selectivity. These improved sensing properties were attributed to the catalytic effect of Au, and enhanced electron depletion at the surface of the Au@SnO(2) yolk-shell nanospheres.
Authors:
Lili Wang; Huimin Dou; Zheng Lou; Tong Zhang
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-8
Journal Detail:
Title:  Nanoscale     Volume:  -     ISSN:  2040-3372     ISO Abbreviation:  Nanoscale     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101525249     Medline TA:  Nanoscale     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China. zhangtong@jlu.edu.cn.
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