材料科学
兴奋剂
氮化硼
纳米技术
带隙
杂原子
凝聚态物理
化学工程
作者
Chaochao Cao,Jingwen Yang,Song Yan,Wenjuan Bai,Yuanhui Ma,Xue Yanming,Chengchun Tang
出处
期刊:2D materials
[IOP Publishing]
日期:2021-11-08
标识
DOI:10.1088/2053-1583/ac37a9
摘要
Abstract Turbostratic and oxygen doping (3.7 atom % ) hexagonal boron nitride nanosheets (TO-BNNSs) with abundant defect sites, were synthesized by pyrolyzing the mixture of melamine cyanurate and boric acid. Systematic analyses reveal a highly disordered structures and covalent oxygen-doping in the TO-BNNSs. These features endow the product with increased unpaired electrons, localized charge asymmetry and spin polarization. While compared with bulk h-BN, the optical bandgap of TO-BNNSs drop down to ~5.2 from ~5.7 eV, dielectric constant raised from ~2.1 to ~2.4, the saturation magnetic moment increased from ~0.011 to ~0.033 emu/g, and the coercivity enlarged from ~73.56 to ~367.39 Oe. These results suggest that h-BN materials with turbostratic structure and heteroatom-doping have extensive application prospect in the fields of nanoscale optics, electronics and magnetics.
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