期刊
CHEMISTRY OF MATERIALS
卷 31, 期 23, 页码 9715-9720出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.9b03249
关键词
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资金
- National Natural Science Foundation of China [11674265]
- Natural Science Basic Research Project of Shaanxi Province [2018JZ6003]
- Fundamental Research Funds for the Central Universities [3102019MS0402]
- Analytical and Testing Center of Northwestern Polytechnical University
Atomically thin two-dimensional (2D) materials have received widespread interest both scientifically and technologically. Recently, the 2D layered BiOI crystal has been revisited for its low-dimensional features and semiconducting properties, yet the production of large-size 2D BiOI single crystals remains challenging. Here, we report the synthesis of millimeter-size single-crystal 2D BiOI sheets and ribbons for the first time by using a sacrifice strategy to optimize the O-2 partial pressure in an atmospheric-pressure growth system. Two types of synthesis mechanism are proposed for these BiOI crystals: (1) 2D nucleation and growth for BiOI sheets (bottom-up); (2) layer-by-layer oxidation and exfoliation for BiOI sheets and ribbons (up-bottom). The top-gated 2D BiOI-based field-effect transistor shows n-type behavior and moderate performance with similar to 10(4) current modulation. Our study gives deep insights into the synthesis of large-size 2D BiOI single crystals and provides a new up-bottom method that could also be used for synthesizing many other 2D materials.
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