Journal
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
Volume 64, Issue 1, Pages 1-10Publisher
SCIENCE PRESS
DOI: 10.1007/s11431-020-1559-2
Keywords
boron nitride; electronic property; functionalization; elastic strain; interface
Funding
- National Natural Science Foundation of China [11772153, 11402115]
- NSF of Jiangsu Province [BK20190018]
- Fundamental Research Funds for the Central Universities [NE2018002]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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BN nanomaterials have high thermal stability and corrosion resistance, but lack semiconductive functionality. By coupling multiple physical fields, the electronic properties of BN nanostructures can be modified, resulting in narrowed bandgaps and even magnetism. Utilizing inherent BN polarity to form electrically polarized interfaces enables controlled electronic properties and high carrier mobility in BN nanostructures.
Boron nitride (BN) nanomaterials share the same atomic structures as their carbon counterparts, with mechanical and thermal properties second only to carbon counterparts. Especially, the iconicity of B-N bonds results in exceptionally high thermal stability and corrosion resistance, making BN nanomaterials a compelling contender for fabricating devices that can operate under harsh environments. However, all pristine BN nanomaterials are electric insulators and lack semiconductive functionality. How to efficiently regulate the electronic properties of BN nanomaterials has impeded the way of delivering their potential into applications. Here, we report an overview of key progress in functionalizing BN nanostructures by means of multi-physical-field coupling at nanoscale. In particular, we present how the chemical doping, electric fields, elastic strains and interfaces can modify the band structures and hence lead to narrowed bandgap and even magnetism in various BN nanostructures. We also discuss the effect of these modulation methods on charge carrier motility as well as potential challenges of their experimental implementation. Without applied doping, strain and electric field, employing inherent BN polarity to form electrically polarized interfaces is proposed to functionalize BN nanostructures towards controlled electronic properties combined with high carrier motility. We finally discuss recent progress of experimental synthesis of quality h-BN samples in large area.
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