中国物理B ›› 2023, Vol. 32 ›› Issue (6): 63601-063601.doi: 10.1088/1674-1056/acc801

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Single-electron transport in H2O@C60 single-molecule transistors

Bowen Liu(刘博文)1,†, Jun Chen(陈俊)1,†, Yiping Ouyang(欧阳一平)1, Minhao Zhang(张敏昊)1,3,‡, Yuan-Zhi Tan(谭元植)2, and Fengqi Song(宋凤麒)1,3   

  1. 1 National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China;
    2 State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;
    3 Atom Manufacturing Institute(AMI), Nanjing 211805, China
  • 收稿日期:2023-01-17 修回日期:2023-03-21 接受日期:2023-03-28 出版日期:2023-05-17 发布日期:2023-05-22
  • 通讯作者: Minhao Zhang E-mail:zhangminhao@nju.edu.cn
  • 基金资助:
    We acknowledge the financial support of the National Key R&D Program of China (Grant No. 2022YFA1402), the National Natural Science Foundation of China (Grant Nos. 92161201, T2221003, 12104221, 12104220, 12274208, 12025404, and 12004174), the Natural Science Foundation of Jiangsu Province, China (Grant Nos. BK20200312 and BK20200310), the Fundamental Research Funds for the Central Universities (Grant No. 020414380192).

Single-electron transport in H2O@C60 single-molecule transistors

Bowen Liu(刘博文)1,†, Jun Chen(陈俊)1,†, Yiping Ouyang(欧阳一平)1, Minhao Zhang(张敏昊)1,3,‡, Yuan-Zhi Tan(谭元植)2, and Fengqi Song(宋凤麒)1,3   

  1. 1 National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing 210093, China;
    2 State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;
    3 Atom Manufacturing Institute(AMI), Nanjing 211805, China
  • Received:2023-01-17 Revised:2023-03-21 Accepted:2023-03-28 Online:2023-05-17 Published:2023-05-22
  • Contact: Minhao Zhang E-mail:zhangminhao@nju.edu.cn
  • Supported by:
    We acknowledge the financial support of the National Key R&D Program of China (Grant No. 2022YFA1402), the National Natural Science Foundation of China (Grant Nos. 92161201, T2221003, 12104221, 12104220, 12274208, 12025404, and 12004174), the Natural Science Foundation of Jiangsu Province, China (Grant Nos. BK20200312 and BK20200310), the Fundamental Research Funds for the Central Universities (Grant No. 020414380192).

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摘要： Single-molecule transistors (SMTs) based on fullerenes and their derivatives have been recognized as a long-sought platform for studying the single-electron transport properties. H2O@C60 is a combination of fullerene and H2O, a typical light molecule. Here we use the ‘molecular surgery’ technique to synthesize the H2O@C60 molecule and then construct the H2O@C60 SMTs, together with the C60 SMTs. Evidences for single-electron transport have been obtained in our measurements, including explicit Coulomb blockade and Coulomb oscillations. We then calculate the detailed parameters of the H2O@C60 and C60 SMTs using a capacitance model derived from the Coulomb diamond feature, which gives a capacitance ratio of 1:5.05:8.52 for the H2O@C60 SMT and 1:29.5:74.8 for the C60 SMT. Moreover, the gate efficiency factor α turns out to be 0.0686 in the H2O@C60 SMT, about ten times larger than that in the C60 SMT. We propose that the enhanced gate efficiency in H2O@C60 SMT may be induced by the closer attachment of molecular orbital electron clouds to the gate substrate due to polarization effects of H2O.

关键词: single-molecule transistor, fullerenes and their derivatives, light molecule, the polarization effect

Abstract: Single-molecule transistors (SMTs) based on fullerenes and their derivatives have been recognized as a long-sought platform for studying the single-electron transport properties. H2O@C60 is a combination of fullerene and H2O, a typical light molecule. Here we use the ‘molecular surgery’ technique to synthesize the H2O@C60 molecule and then construct the H2O@C60 SMTs, together with the C60 SMTs. Evidences for single-electron transport have been obtained in our measurements, including explicit Coulomb blockade and Coulomb oscillations. We then calculate the detailed parameters of the H2O@C60 and C60 SMTs using a capacitance model derived from the Coulomb diamond feature, which gives a capacitance ratio of 1:5.05:8.52 for the H2O@C60 SMT and 1:29.5:74.8 for the C60 SMT. Moreover, the gate efficiency factor α turns out to be 0.0686 in the H2O@C60 SMT, about ten times larger than that in the C60 SMT. We propose that the enhanced gate efficiency in H2O@C60 SMT may be induced by the closer attachment of molecular orbital electron clouds to the gate substrate due to polarization effects of H2O.

Key words: single-molecule transistor, fullerenes and their derivatives, light molecule, the polarization effect

中图分类号:  (Atomic and molecular clusters)

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