Journal
NANO RESEARCH
Volume 11, Issue 2, Pages 665-675Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1673-5
Keywords
selective oxidation; core-shell nanowires; nanotubes; assembled thin films; photoconductivity
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Funding
- National Natural Science Foundation of China [21431006, 21761132008]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521001]
- Key Research Program of Frontier Sciences, CAS [QYZDJ-SSW-SLH036]
- National Basic Research Program of China [2014CB931800]
- Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS [2015HSC-UE007]
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One-dimensional hollow nanostructures have potential applications in many fields and can be fabricated using various methods. Herein, a selective-oxidation route for the synthesis of unique SexTey nanotubes (STNTs) with a controlled morphology using TexSey@Se core-shell nanowires (TSSNWs) as a template is reported. Because of the lower redox potential of TeO2/Te compared to that of H2SeO3/Se, the Te in TSSNWs can be preferentially oxidized by an appropriate oxidant of HNO2 to form STNTs. The inner diameters and wall thicknesses of the STNTs can be tuned by modulating the core diameters and shell thicknesses of the TSSNWs, respectively. The STNTs can be assembled into a monolayer composed of well-arranged nanotubes using the Langmuir-Blodgett technique. A device based on films stacked with 10 STNT monolayers was fabricated to investigate the photocoductivity of the STNTs. The STNTs exhibited a good photoresponse over the whole ultraviolet-visible spectrum, revealing their potential for application in optoelectronic devices.
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