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JST Press Release

February 05, 2016
Japan Science and Technology Agency (JST)
5-3, Yonbancho, Chiyoda-ku, Tokyo 102-8666

Growth of an air stable bilayer silicene: a promising building block for electronic devices and electrodes of batteries

We have succeeded in the synthesis of a bilayer silicene, which is a new allotrope of silicon, containing four-, five- and six-membered sp3 silicon rings, after treating calcium-intercalated monolayer silicene (CaSi2) with a BF4- -based ionic liquid. The bilayer silicene has high chemical stability by reducing the number of unsaturated silicon bonds. Additionally, the bandgap opens to 1.08 eV and is indirect; this is in contrast to monolayer silicene which is a zero-gap semiconductor. The findings provide a basis for future studies for electronic devices and electrodes of batteries.

Researcher Information

Research Area “New Materials Science and Element Strategy”
Research Theme “Development of transition metal free anion batteries”

Journal Information

Ritsuko Yaokawa, Tetsu Ohsuna, Tetsuya Morishita, Yuichiro Hayasaka, Michelle J. S. Spencer, and Hideyuki Nakano. “Monolayer-to-bilayer transformation of silicenes and their structural analysis”. Nature Communications, Published online 05 February 2016, doi: 10.1038/ncomms10657.


[About Research]
Hideyuki Nakano, Ph.D.
Principal Researcher, Program Manager, Functionalized Low-Dimensional Silicon Program, Strategic Innovation Research-Domain, TOYOTA Central R&D Labs., Inc.
URL: http://www.tytlabs.com/

[About Program]
Sofia Saori Suzuki
Green Innovation Group, Department of Innovation Research, JST


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