Performance modulation of α-MnO2 nanowires by crystal facet engineering

Li, Wenxian, Cui, Xiangyuan, Zeng, Rong, Du, Guodong, Sun, Ziqi, Zheng, Rongkun, Ringer, Simon P., & Dou, Shi Xue (2015) Performance modulation of α-MnO2 nanowires by crystal facet engineering. Scientific Reports, 5, Article number: 8987.

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Abstract

Modulation of material physical and chemical properties through selective surface engineering is currently one of the most active research fields, aimed at optimizing functional performance for applications. The activity of exposed crystal planes determines the catalytic, sensory, photocatalytic, and electrochemical behavior of a material. In the research on nanomagnets, it opens up new perspectives in the fields of nanoelectronics, spintronics, and quantum computation. Herein, we demonstrate controllable magnetic modulation of α-MnO 2 nanowires, which displayed surface ferromagnetism or antiferromagnetism, depending on the exposed plane. First-principles density functional theory calculations confirm that both Mn- and O-terminated α-MnO2(1 1 0) surfaces exhibit ferromagnetic ordering. The investigation of surface-controlled magnetic particles will lead to significant progress in our fundamental understanding of functional aspects of magnetism on the nanoscale, facilitating rational design of nanomagnets. Moreover, we approved that the facet engineering pave the way on designing semiconductors possessing unique properties for novel energy applications, owing to that the bandgap and the electronic transport of the semiconductor can be tailored via exposed surface modulations.

Impact and interest:

9 citations in Scopus
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7 citations in Web of Science®

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ID Code: 94591
Item Type: Journal Article
Refereed: Yes
DOI: 10.1038/srep08987
ISSN: 2045-2322
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2016 The authors
Copyright Statement: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Deposited On: 08 Apr 2016 03:09
Last Modified: 10 Apr 2016 22:40

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