期刊
ACS NANO
卷 4, 期 1, 页码 414-422出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn901204c
关键词
boron nitride nanosheets; alignment; chemical vapor deposition; cathodoluminescence; superhydrophobicity
类别
资金
- NSFC [50572019, 50972033]
- New Century Excellent Talents in University [NCET060343]
- SRF
- SEM
- Shenzhen government
Boron nitride (BN) is a promising semiconductor with a wide band gap (similar to 6 eV). Here, we report the synthesis of vertically aligned BN nanosheets (BNNSs) on silicon substrates by microwave plasma chemical vapor deposition from a gas mixture of BF3-N-2-H-2. The size, shape, thickness, density, and alignment of the BNNSs were well-controlled by appropriately changing the growth conditions, With changing the gas flow rates of BF3 and H-2 as well as. their ratio, the BNNSs evolve from three-dimensional with branches to two-dimensional with smooth surface and their thickness changes from 20 to below 5 nm. The growth of the BNNSs rather than uniform granular films is attributed to the particular chemical properties of the gas system, mainly the strong etching effect of fluorine. The alignment of the BNNSs is possibly induced by the electrical field-generated in plasma sheath. Strong UV light emission with abroad band ranging from 200 to 400 nm and superhydrophobicity with contact angles over 150 degrees were obtained for the vertically aligned BNNSs. The present BNNSs possess the properties complementary to carbon nanosheets such as intrinsically semiconducting, high temperature stability, and high chemical inertness and may find applications in ultraviolet nanoelectronics, catalyst supports, electron field emission, and self-cleaning coatings, etc., especially those working at high temperature and in harsh environments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据