中国物理B ›› 2019, Vol. 28 ›› Issue (6): 66402-066402.doi: 10.1088/1674-1056/28/6/066402

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Pressure-induced isostructural phase transition in α-Ni(OH)2 nanowires

Xin Ma(马鑫), Zhi-Hui Li(李志慧), Xiao-Ling Jing(荆晓玲), Hong-Kai Gu(顾宏凯), Hui Tian(田辉), Qing Dong(董青), Peng Wang(王鹏), Ran Liu(刘然), Bo Liu(刘波), Quan-Jun Li(李全军), Zhen Yao(姚震), Bing-Bing Liu(刘冰冰)   

  1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
  • 收稿日期:2019-01-30 修回日期:2019-03-12 出版日期:2019-06-05 发布日期:2019-06-05
  • 通讯作者: Quan-Jun Li, Zhen Yao E-mail:liquanjun@jlu.edu.cn;yaozhenjlu@163.com
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant No. 2018YFA0305900), the National Natural Science Foundation of China (Grant Nos. 11874172, 11374120, 11634004, and 51320105007), and the Fund from Jilin University for Science and Technology Innovative Research Team (Grant No. 2017TD-01).

Pressure-induced isostructural phase transition in α-Ni(OH)2 nanowires

Xin Ma(马鑫), Zhi-Hui Li(李志慧), Xiao-Ling Jing(荆晓玲), Hong-Kai Gu(顾宏凯), Hui Tian(田辉), Qing Dong(董青), Peng Wang(王鹏), Ran Liu(刘然), Bo Liu(刘波), Quan-Jun Li(李全军), Zhen Yao(姚震), Bing-Bing Liu(刘冰冰)   

  1. State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
  • Received:2019-01-30 Revised:2019-03-12 Online:2019-06-05 Published:2019-06-05
  • Contact: Quan-Jun Li, Zhen Yao E-mail:liquanjun@jlu.edu.cn;yaozhenjlu@163.com
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant No. 2018YFA0305900), the National Natural Science Foundation of China (Grant Nos. 11874172, 11374120, 11634004, and 51320105007), and the Fund from Jilin University for Science and Technology Innovative Research Team (Grant No. 2017TD-01).

摘要:

High pressure structural phase transition of monoclinic paraotwayite type α-Ni(OH)2 nanowires with a diameter of 15 nm-20 nm and a length of several micrometers were studied by synchrotron x-ray diffraction (XRD) and Raman spectra. It is found that the α-Ni(OH)2 nanowires experience an isostructural phase transition associated with the amorphization of the H-sublattice of hydroxide in the interlayer spaces of the two-dimensional crystal structure at 6.3 GPa-9.3 GPa. We suggest that the isostructural phase transition can be attributed to the amorphization of the H-sublattice. The bulk moduli for the low pressure phase and the high pressure phase are 41.2 (4.2) GPa and 94.4 (5.6) GPa, respectively. Both the pressure-induced isostructural phase transition and the amorphization of the H-sublattice in the α-Ni(OH)2 nanowires are reversible upon decompression. Our results show that the foreign anions intercalated between the α-Ni(OH)2 layers play important roles in their structural phase transition.

关键词: nickel hydroxide, high pressure, synchrotron radiation, isostructural phase transition

Abstract:

High pressure structural phase transition of monoclinic paraotwayite type α-Ni(OH)2 nanowires with a diameter of 15 nm-20 nm and a length of several micrometers were studied by synchrotron x-ray diffraction (XRD) and Raman spectra. It is found that the α-Ni(OH)2 nanowires experience an isostructural phase transition associated with the amorphization of the H-sublattice of hydroxide in the interlayer spaces of the two-dimensional crystal structure at 6.3 GPa-9.3 GPa. We suggest that the isostructural phase transition can be attributed to the amorphization of the H-sublattice. The bulk moduli for the low pressure phase and the high pressure phase are 41.2 (4.2) GPa and 94.4 (5.6) GPa, respectively. Both the pressure-induced isostructural phase transition and the amorphization of the H-sublattice in the α-Ni(OH)2 nanowires are reversible upon decompression. Our results show that the foreign anions intercalated between the α-Ni(OH)2 layers play important roles in their structural phase transition.

Key words: nickel hydroxide, high pressure, synchrotron radiation, isostructural phase transition

中图分类号:  (Structural transitions in nanoscale materials)

  • 64.70.Nd
91.60.Gf (High-pressure behavior) 07.35.+k (High-pressure apparatus; shock tubes; diamond anvil cells) 61.05.cp (X-ray diffraction)