3 years ago

Ultrathin Bi Nanosheets with Superior Photoluminescence

Ultrathin Bi Nanosheets with Superior Photoluminescence
Tauseef Anwar, Naveed Hussain, Tongxiang Liang, Hui Wu, Kai Huang, Ya Huang, Qingyun Zhang, Jiangliang Lang
Despite substantial progress in the science and technology of 2D nanomaterials, facile fabrication of ultrathin 2D metals remains challenging. Herein, an efficient hot-pressing method is developed to fabricate free-standing ultrathin Bi nanosheets from Bi nanoparticles. Highly crystalline Bi nanosheets with thickness as low as ≈2 nm and area of more than several micrometers are successfully fabricated on silicon substrates. The ultrathin Bi nanosheets exhibit morphology and structural dependent enhanced broad range photoemission in visible region of spectrum. Our cost-effective hot-pressing strategy may open an insight for production, application, and deficient fundamental understanding of other 2D semimetals/metalloids and noble metals. Facile fabrication of ultrathin 2D metals/semimetals remains a challenging task. By using a facile and cost-effective hot-pressing strategy, highly crystalline and ultrathin Bi nanosheets with thickness as low as ≈2 nm and area of several micrometers are successfully fabricated on silicon substrates. The ultrathin Bi nanosheets exhibit morphology and structural dependent enhanced broad range photoemission in the visible region of the spectrum.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/smll.201701349

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