中国物理B ›› 2025, Vol. 34 ›› Issue (6): 66105-066105.doi: 10.1088/1674-1056/adc192

所属专题: SPECIAL TOPIC — Structures and properties of materials under high pressure

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Morphology-tuned phase transition of MnO2 nanorods under high pressure

Xue-Ting Zhang(张雪婷)1, Chen-Yi Li(李晨一)2, Hui Tian(田辉)3, Xin-Yue Wang(王心悦)1, Zong-Lun Li(李宗伦)2,4,†, and Quan-Jun Li(李全军)2   

  1. 1 School of Medical Information Engineering, Shenyang Medical College, Shenyang 110034, China;
    2 State Key Laboratory of High Pressure and Superhard Materials, Jilin University, Changchun 130012, China;
    3 School of Science, Shenyang Ligong University, Shenyang 110159, China;
    4 Spallation Neutron Source Science Center, Dongguan 523803, China
  • 收稿日期:2025-02-06 修回日期:2025-03-15 接受日期:2025-03-18 出版日期:2025-05-16 发布日期:2025-05-16
  • 通讯作者: Zong-Lun Li E-mail:lizl20@mails.jlu.edu.cn
  • 基金资助:
    We would like to thank Beijing Synchrotron Radiation Facility technical support groups. Project supported by China Postdoctoral Science Foundation (Grant No. 2023M742049), Guangdong Basic and Applied Basic Research Foundation (Grant No. 2023A1515110844), and the Innovative Training Program for College Students (Grant No. 20249076).

Morphology-tuned phase transition of MnO2 nanorods under high pressure

Xue-Ting Zhang(张雪婷)1, Chen-Yi Li(李晨一)2, Hui Tian(田辉)3, Xin-Yue Wang(王心悦)1, Zong-Lun Li(李宗伦)2,4,†, and Quan-Jun Li(李全军)2   

  1. 1 School of Medical Information Engineering, Shenyang Medical College, Shenyang 110034, China;
    2 State Key Laboratory of High Pressure and Superhard Materials, Jilin University, Changchun 130012, China;
    3 School of Science, Shenyang Ligong University, Shenyang 110159, China;
    4 Spallation Neutron Source Science Center, Dongguan 523803, China
  • Received:2025-02-06 Revised:2025-03-15 Accepted:2025-03-18 Online:2025-05-16 Published:2025-05-16
  • Contact: Zong-Lun Li E-mail:lizl20@mails.jlu.edu.cn
  • Supported by:
    We would like to thank Beijing Synchrotron Radiation Facility technical support groups. Project supported by China Postdoctoral Science Foundation (Grant No. 2023M742049), Guangdong Basic and Applied Basic Research Foundation (Grant No. 2023A1515110844), and the Innovative Training Program for College Students (Grant No. 20249076).

摘要: The structural phase transition of MnO$_{2}$ nanorods was investigated using in situ high pressure synchrotron x-ray diffraction (XRD) and transmission electron microscopy (TEM). At pressures exceeding 10.9 GPa, a second-order structural phase transition from tetragonal to orthogonal, which was accompanied by fine-scale crystal twinning phenomena, was observed in MnO$_{2}$ nanorods. On account of the significant contribution of surface energy, the phase transition pressure exhibited appreciable hysteresis compared with the bulk counterparts, suggesting the enhanced structural stability of nanorod morphology. These findings reveal that the size and morphology exhibit a manifest correlation with the high pressure behavior of MnO$_{2}$ nanomaterials, providing useful insights into the intricate interplay between structure and properties.

关键词: MnO$_{2}$ nanorods, morphology, high pressure, phase transition

Abstract: The structural phase transition of MnO$_{2}$ nanorods was investigated using in situ high pressure synchrotron x-ray diffraction (XRD) and transmission electron microscopy (TEM). At pressures exceeding 10.9 GPa, a second-order structural phase transition from tetragonal to orthogonal, which was accompanied by fine-scale crystal twinning phenomena, was observed in MnO$_{2}$ nanorods. On account of the significant contribution of surface energy, the phase transition pressure exhibited appreciable hysteresis compared with the bulk counterparts, suggesting the enhanced structural stability of nanorod morphology. These findings reveal that the size and morphology exhibit a manifest correlation with the high pressure behavior of MnO$_{2}$ nanomaterials, providing useful insights into the intricate interplay between structure and properties.

Key words: MnO$_{2}$ nanorods, morphology, high pressure, phase transition

中图分类号:  (Crystallographic aspects of phase transformations; pressure effects)

  • 61.50.Ks
91.60.Gf (High-pressure behavior) 81.10.-h (Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation) 64.60.-i (General studies of phase transitions)