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Nano Research

Article Title

Selective oxidation mediated synthesis of unique Se x Te y nanotubes, their assembled thin films and photoconductivity

Authors

Yuan Yang, Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Centre of Suzhou Nano Science and Technology, CAS Centre for Excellence in Nanoscience, Department of Chemistry, Hefei Science Centre of CAS, University of Science and Technology of China, Hefei 230026, China
Guo-Qiang Liu, Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Centre of Suzhou Nano Science and Technology, CAS Centre for Excellence in Nanoscience, Department of Chemistry, Hefei Science Centre of CAS, University of Science and Technology of China, Hefei 230026, China
Min-Rui Gao, Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Centre of Suzhou Nano Science and Technology, CAS Centre for Excellence in Nanoscience, Department of Chemistry, Hefei Science Centre of CAS, University of Science and Technology of China, Hefei 230026, China
Yu Xia, Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Centre of Suzhou Nano Science and Technology, CAS Centre for Excellence in Nanoscience, Department of Chemistry, Hefei Science Centre of CAS, University of Science and Technology of China, Hefei 230026, China
Shu-Hong Yu, Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovation Centre of Suzhou Nano Science and Technology, CAS Centre for Excellence in Nanoscience, Department of Chemistry, Hefei Science Centre of CAS, University of Science and Technology of China, Hefei 230026, China

Keywords

selective oxidation, core-shell nanowires, nanotubes, assembled thin films, photoconductivity

Abstract

ABSTRACT 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.

Graphical Abstract

Publisher

Tsinghua University Press

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