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Design and Control of Highly Conductive Single-Molecule Junctions: A Focus on the Metal–Molecule Interface
Loại tài liệu: Book
Mã tài liệu: 85436
Mã ngôn ngữ: en
Tác giả: Kaneko, Satoshi
Thông tin xuất bản: Springer
Tình trạng vật lý: 92 p.
Từ khóa: Semiconductors; Junctions; Interfaces; Electricity; Electromagnetism; Single molecular junction; Electron transport; Single molecule spectroscopy; Molecular electronics
Danh mục: Vật lý
Năm xuất bản: 2017
Số sách còn lại: Không giới hạn
Thời gian mượn: Bạn chưa đăng nhập.
Tóm tắt theo nội dung: This thesis describes improvements to and control of the electrical conductance in single-molecule junctions (SMJs), which have potential applications in molecular electronics, with a focus on the bonding between the metal and molecule. In order to improve the electrical conductance, the π orbital of the molecule is directly bonded to the metal orbital, because anchoring groups, which were typically used in other studies to bind molecule with metal electrodes, became resistive spacers. Using this direct π-binding, the author has successfully demonstrated highly conductive SMJs involving benzene, endohedral metallofullerene Ce@C82, and nitrogen. Subsequently, the author investigated control of the electrical conductance of SMJs using pyrazine. The nitrogen atom in the π-conjugated system of pyrazine was expected to function as an anchoring point, and two bonding states were expected. One originates primarily from the π orbital, while the other originates primarily from an n state of the nitrogen. Measurements of conductance and dI/dV spectra coupled with theoretical calculations revealed that the pyrazine SMJ has bistable conductance states, in which the pyrazine axis is either tilted or parallel with respect to the junction axis...
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