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Quantifying the conductivity of a single polyene chain by lifting with an STM tip.
You, Sifan; Yu, Cuiju; Gao, Yixuan; Li, Xuechao; Peng, Guyue; Niu, Kaifeng; Xi, Jiahao; Xu, Chaojie; Du, Shixuan; Li, Xingxing; Yang, Jinlong; Chi, Lifeng.
Afiliación
  • You S; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China.
  • Yu C; Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China.
  • Gao Y; Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, 100190, Beijing, China.
  • Li X; State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, 100083, Beijing, China.
  • Peng G; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China.
  • Niu K; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China.
  • Xi J; Department of Physics, Chemistry and Biology, IFM, Linköping University, Linköping, 581 83, Sweden.
  • Xu C; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China.
  • Du S; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China.
  • Li X; Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, 100190, Beijing, China.
  • Yang J; Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China.
  • Chi L; Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China. lixx@ustc.edu.cn.
Nat Commun ; 15(1): 6475, 2024 Aug 01.
Article en En | MEDLINE | ID: mdl-39085228
ABSTRACT
Conjugated polymers are promising candidates for molecular wires in nanoelectronics, with flexibility in mechanics, stability in chemistry and variety in electrical conductivity. Polyene, as a segment of polyacetylene, is a typical conjugated polymer with straightforward structure and wide-range adjustable conductance. To obtain atomic scale understanding of charge transfer in polyene, we have measured the conductance of a single polyene-based molecular chain via lifting it up with scanning tunneling microscopy tip. Different from semiconducting characters in pristine polyene (polyacetylene), high conductance and low decay constant are obtained, along with an electronic state around Fermi level and characteristic vibrational mode. These observed phenomena result from pinned molecular orbital owing to molecule-electrode coupling at the interface, and weakened bond length alternation due to electron-phonon coupling inside single molecular chain. Our findings emphasize the interfacial characteristics in molecular junctions and promising properties of polyene, with single molecular conductance as a vital tool for bringing insights into the design and construction of nanodevices.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido