Masato Takei
;
Akira Takatsuki
;
Katsunori Wakabayashi
;
Satoshi Kaneko
;
Hiroshi Suga
;
Yasuhisa Naitoh
;
Kazuhito Tsukagoshi
コレクション
引用
説明:
(abstract)Electric switching in a single-molecule junction based on the asymmetric C60 pyrrolidine tris-acid (CPTA) molecule was demonstrated using nanogap electrodes spin-coated with a CPTA thin film. Among the embedded molecules, those closest to the cathode were preferentially activated during two-terminal conductance measurements, exhibiting reproducible bistable switching between low- and high-conductance states at room temperature. The CPTA molecule was anchored to the cathode via a carboxyl ligand, while the opposing electrode was positioned to allow modulation of the molecule–electrode distance by an applied bias voltage. This configuration enabled two distinct transport regimes: metal–fullerene conduction in the high-conductance state and through-space tunneling across a metal–CPTA–vacuum–metal junction in the low-conductance state. Analysis of the high-conductance state using the single-level tunneling transport model confirmed that charge transport occurred through a single molecule, despite the film-based fabrication. In the low-conductance state, transition voltage spectroscopy revealed that the junction asymmetry parameter was strongly dependent on the through-space distance between the fullerene cage and the opposing electrode, offering insight into structural modulation during switching.
権利情報:
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In Copyright
This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in ACS Applied Materials & Interfaces, copyright © 2025 American Chemical Society after peer review. To access the final edited and published work see https://doi.org/10.1021/acsami.5c14847.
キーワード: fullerene, Single-molecule device, transition voltage spectroscopy, single-level transport model, C60 pyrrolidine tris-acid
刊行年月日: 2025-10-13
出版者: American Chemical Society (ACS)
掲載誌:
- ACS Applied Materials & Interfaces (ISSN: 19448244) vol. 17 issue. 42 acsami.5c14847
研究助成金:
- Japan Society for the Promotion of Science 20K05291
原稿種別: 査読前原稿 (Author's original)
MDR DOI: https://doi.org/10.48505/nims.5855
公開URL: https://doi.org/10.1021/acsami.5c14847
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更新時刻: 2025-11-06 12:30:22 +0900
MDRでの公開時刻: 2025-11-06 12:24:47 +0900