Lu Han Lun, Rong Min Zhi, Zhang Ming Qiu
Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GD HPPC Lab, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, People's Republic of China.
Nanotechnology. 2018 Mar 23;29(12):12LT01. doi: 10.1088/1361-6528/aaa822.
A quadrupole electric field-mediated exfoliation method is proposed to convert micron-sized hexagonal boron nitride (h-BN) powder into few-layer hexagonal boron nitride nanosheets (h-BNNS). Under optimum conditions (400 Hz, 40 V, 32 μg ml, sodium deoxycholate, TAE medium), the h-BN powders (thickness >200 nm, horizontal scale ∼10 μm) are successfully exfoliated into 0.5-4 nm (1-10 layers) thick h-BNNS with the same horizontal scale. Dynamic laser scattering and atomic force microscope data show that the yield is 47.6% (for the portion with the thickness of 0.5-6 nm), and all of the vertical sizes are reduced to smaller than 18 nm (45 layers).
提出了一种四极电场介导的剥离方法，将微米级六方氮化硼（h-BN）粉末转化为少层六方氮化硼纳米片（h-BNNS）。在最佳条件下（400 Hz、40 V、32 μg/ml、脱氧胆酸钠、TAE培养基），h-BN粉末（厚度>200 nm，水平尺寸~10 μm）成功剥离成水平尺寸相同、厚度为0.5-4 nm（1-10层）的h-BNNS。动态激光散射和原子力显微镜数据表明，产率为47.6%（对于厚度为0.5-6 nm的部分），并且所有垂直尺寸都减小到小于18 nm（45层）。
