氮化铝纳米线的高压同步辐射研究

沈龙海; 崔启良; 李雪飞

doi:10.11858/gywlxb.2010.04.005

氮化铝纳米线的高压同步辐射研究

doi: 10.11858/gywlxb.2010.04.005

1.
沈阳理工大学理学院，辽宁沈阳 110159；
2.
吉林大学超硬材料国家重点实验室，吉林长春 130012

详细信息

通讯作者:
崔启良

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出版历程
- 收稿日期: 2009-07-22
- 修回日期: 2009-09-30
- 发布日期: 2010-08-15

Synchrotron Radiation X-Ray Diffraction Study of AlN Nanowires under High Pressures

1.
1. School of Science, Shenyang Ligong University, Shenyang 110159, China;

2.
National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China

More Information

Corresponding author: CUI Qi-Liang

摘要

摘要: 利用金刚石对顶砧和同步辐射光源，对用电弧法制备的、具有纤锌矿结构的氮化铝（AlN）纳米线进行了最高压力达51.1 GPa的原位角散X射线衍射研究。结果表明：当压力上升至24.9 GPa时，纤锌矿结构的AlN纳米线开始向岩盐矿结构转变；当完全卸压后，最终的岩盐矿结构被保留下来；纤锌矿AlN纳米线的轴向比例c/a随压力增加而线性减小。AlN纳米线独特的线状结构决定了其区别于AlN微晶和AlN纳米晶的高压行为。
- 氮化铝纳米线 /
- 同步辐射 /
- 结构转变 /
- 体弹性模量
Abstract: The high-pressure behavior of wurtzite AlN nanowires is studied up to 51.1 GPa by in situ angle dispersive X-ray diffraction using synchrotron radiation source and a diamond anvil cell. With increasing pressure up to 24.9 GPa, the wurtzite-to-rocksalt phase transition was observed. The rocksalt phase is quenched after a complete pressure release. The axial ratio c/a of the wurtzite AlN nanowires decreases linearly with increasing pressure. The unique wire-like structure in AlN nanowires results in the high pressure behavior being different from that of the bulk and nanocrystal AlN.
- AlN nanowires /
- synchrotron X-ray diffraction /
- structure transition /
- bulk modulus

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参考文献(11)

Wickham J N, Herhold A B, Alivisatos A P. Shape Change as an Indicator of Mechanism in the High-Pressure Structural Transformations of CdSe Nanocrystals [J]. Phys Rev Lett, 2000, 84(5): 923-926.

Zhao X S, Schroeder J, Persans P D, et al. Resonant-Raman-Scattering and Photoluminescence Studies in Glass-Composite and Colloidal CdS [J]. Phys Rev B, 1991, 43(15): 12580-12589.

Qadri S B, Yang J, Ratna B R, et al. Pressure Induced Structural Transitions in Nanometer Size Particles of PbS [J]. Appl Phys Lett, 1996, 69(15): 2205-2207.

He Y, Liu J F, Chen W, et al. High-Pressure Behavior of SnO2 Nanocrystals [J]. Phys Rev B, 2005, 72(21): 212102.

Wang Y J, Zhang J Z, Wu J, et al. Phase Transition and Compressibility in Silicon Nanowires [J]. Nano Lett, 2008, 8(9): 2891-2895.

Ueno M, Onodera A, Shimomura O, et al. X-Ray Observation of the Structural Phase Transition of Aluminum Nitride under High Pressure [J]. Phys Rev B, 1992, 45(17): 10123-10126.

Xia Q, Xia H, Ruoff A L. Pressure-Induced Rocksalt Phase of Aluminum Nitride: A Metastable Structure at Ambient Condition [J]. J Appl Phys, 1993, 73(12): 8198-8200.

Uehara S, Masamoto T, Onodera A, et al. Equation of State of the Rocksalt Phase of Ⅲ-Ⅴ Nitrides to 72 GPa or Higher [J]. J Phys Chem Solids, 1997, 58(12): 2093-2099.

Wang Z W, Tait K, Zhao Y S, et al. Size-Induced Reduction of Transition Pressure and Enhancement of Bulk Modulus of AlN Nanocrystals [J]. J Phys Chem B, 2004, 108(31): 11506-11508.

Shen L H, Li X F, Zhang J, et al. Synthesis of Single-Crystalline Wurtzite Aluminum Nitride Nanowires by Direct Arc Discharge [J]. Appl Phys A, 2006, 84(1-2): 73-75.

Lawaetz P. Stability of the Wurtzite Structure [J]. Phys Rev B, 1972, 5(10): 4039-4045.

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