A facile route to high-purity BN nanoplates with ultraviolet cathodoluminescence emissions at room temperature
A facile route to high-purity BN nanoplates with ultraviolet cathodoluminescence emissions at room temperature
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DOI：
10.1016/j.materresbull.2014.02.016
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发表时间：
2014-05
影响因子：
5.4
通讯作者：
B. Zhong;G. Zhao;Xiaoxiao Huang;Xiaodong Zhang;Jingwei Chen;Hangjuan Ren;G. Wen
中科院分区：
文献类型：
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作者：
B. Zhong;G. Zhao;Xiaoxiao Huang;Xiaodong Zhang;Jingwei Chen;Hangjuan Ren;G. Wen
我们提出了一种新颖且特别简单的方法，使用氨硼烷作为单源前体大规模制造 BN 纳米板。通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、高分辨率透射电子显微镜 (HRTEM) 和电子能量损失光谱 (EELS) 对合成产物的结构和化学成分进行了广泛表征。 XRD分析表明产物为六方BN晶体。 SEM 图像证实 BN 纳米片的平均直径约为 200 nm，厚度为数十纳米。 HRTEM 结果表明 BN 纳米板是单晶。 EELS结果表明纳米板由硼和氮化物元素组成。根据我们的实验观察，阐明了 BN 纳米片的形成机制，并提出了相应的生长模型。进行阴极发光光谱分析并检测强紫外线 (UV) 发射。我们的方法为大规模制造高质量氮化硼纳米板提供了一条简单的途径，可以预见各种有前途的应用，例如紧凑型紫外线发射器。
We present a novel and notably simple approach to fabricate BN nanoplates in large scale employing ammonia borane as a single-source precursor. The structure and chemical composition of the as-synthesized products are extensively characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM) and electron energy-loss spectroscopy (EELS). XRD analysis indicates that the products are hexagonal BN crystal. SEM images confirm that the BN nanoplates have an average diameter of about 200 nm and thickness of tens of nanometers. HRTEM results illustrate the BN nanoplates to be single-crystals. EELS result suggests the nanoplates are composed of boron and nitride elements. The formation mechanism of the BN nanoplates has been elucidated based on our experimental observations, and a growth model has been proposed accordingly. Cathodoluminescence spectroscopic analysis is performed and strong ultraviolet (UV) emissions are detected. Our method provides a simple route towards the large-scale fabrication of high-quality BN nanoplates, for which various promising applications such as compact UV emitters can be envisioned.