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2006年06月10日

【期刊论文】The Electronic Structures and Formation Mechanisms of the Single-Walled BN Nanotube with Small Diameter

胡征， Hua Xu， Jing Ma， *， Xin Chen， Zheng Hu， Kaifu Huo， and Yi Chen

J. Phys. Chem. B, Vol. 108, No.13, 2004 4025，-0001，（）：

-1年11月30日

A possible smallest single-walled BN nanotube with the diameter of 0.4nm is proposed. The studied nanotube is of armchair (3,3) and thought to be associated with the BN fullerene, B12N12. We have applied the ab initio MP2/6-31G//HF/6-31G method to investigate the growth mechanisms of this nanotube from B12N12. Our results show that a B12N12 fullerene may react with B2H6 and NH3 to form an armchair (3,3) tubular structure under certain experimental conditions such as high temperature. The armchair (3,3) tube can continuously incorporate B and N atoms to grow and can also disassociate H2 to close into a half-B12N12 cap. The growth of the tube is predicted to be favorable to the capping of the tube in an atmosphere with B2H6 and NH3 in it. And the cap of the tube is relatively easier to be opened by H2 or B2H6 and NH3 to convert to a growing open-ended tube.

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2006年06月10日

【期刊论文】Synthesis and Optical Characterization of Aluminum Nitride Nanobelts

胡征， Qiang Wu， Zheng Hu， *， Xizhang Wang， and Yi Chen， Yinong Lu

J. Phys. Chem. B, Vol. 107, No.36, 2003 9727，-0001，（）：

-1年11月30日

摘要

Aluminum nitride nanobelts with hexagonal structure were successfully synthesized by evaporating aluminum powder in ammonia/nitrogen atmosphere at 1200℃. The as-prepared AlN nanobelts have a rectangular cross section with a width of 30-500nm and length of about 100m. The optical characterization indicates that the vibration modes of the AlN nanobelt agree well with those of AlN film despite its nanobelt geometry. This nanobelt geometry of AlN could be important for the construction of GaN-based nanoheterostructures in future nanoelectronics.