Jinxin Liu, Mengqi Zeng, Lingxiang Wang, Yongting Chen, Zhuo Xing, Tao Zhang, Zheng Liu, Junlai Zuo, Fan Nan, Rafael G. Mendes, Shengli Chen, Feng Ren, Ququan Wang, Mark H. Rümmeli, Lei Fu*, "Ultra-Fast Self-Limited Growth of Strictly Monolayer WSe2 Crystals", Small 2016, 12, 5741-5749.
A Cu-assisted self-limited growth method is proposed to achieve the ultra-fast growth of strictly monolayer and high-quality WSe2 crystals, by L. Fu and co-workers on page 5741. Cu can prevent the layer accumulation since it occupies the surface of the WSe2 crystals, thus the W atoms can only adsorb on the edge site to achieve the size extension.