Narrowed bandgaps and stronger excitonic effects from small boron nitride nanotubes

Yu, Jun, Yu, Dehong, Chen, Ying, Lin, Meng-Yeh, Cheng, Bing-Ming, Li, Jia and Duan, Wenhui 2009, Narrowed bandgaps and stronger excitonic effects from small boron nitride nanotubes, Chemical physics letters, vol. 476, pp. 240-243.

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Title Narrowed bandgaps and stronger excitonic effects from small boron nitride nanotubes
Author(s) Yu, Jun
Yu, Dehong
Chen, Ying
Lin, Meng-Yeh
Cheng, Bing-Ming
Li, Jia
Duan, Wenhui
Journal name Chemical physics letters
Volume number 476
Start page 240
End page 243
Total pages 4
Publisher Elsevier BV
Place of publication Amsterdam, Netherlands
Publication date 2009
ISSN 0009-2614
1873-4448
Summary The bandgap of boron nitride nanotubes (BNNTs) is generally considered to be independent on tube radius and chirality. However, we have observed that the bandgaps of BNNTs do depend on the tube size. Photoluminescence excitation spectroscopy with variable photon energies in vacuum ultraviolet (VUV) range revealed that the bandgap becomes smaller when the tube diameter decreases. This is consistent with red-shifted luminescent emissions. The strong interactions between excitons and phonons are possibly responsible for the bandgap narrowing as the function of nanotube size. 2009 Elsevier B.V. All rights reserved.
Language eng
Field of Research 100708 Nanomaterials
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30029176

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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