Design and Control of Highly Conductive Single-Molecule Junctions Ebook

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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 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 -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 -conjugated system of pyrazine was expected to function as an anchoring point and two bonding states were expected One originates primarily from the 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 The bistable states were switched by changing the gap size between the metal electrodes using an external force Notably it is difficult to change the electrical properties of bulk-state materials using mechanical force The findings reveal that the electron transport properties of a SMJ can be controlled by designing a proper metalmolecule interface which has considerable potential for molecular electronics Moreover this thesis will serve as a guideline for every step of SMJ research design fabrication evaluation and controlDesign and Control of Highly Conductive Single-Molecule Junctions EbookA Focus on the MetalMolecule Interface By Satoshi Kaneko Publisher Springer Print ISBN 9789811044113 9811044112 eText ISBN 9789811044120 9811044120 Copyright year 2017 Format PDF Available from 10900 USD SKU 9789811044120

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9789811044113

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 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 -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 -conjugated system of pyrazine was expected to function as an anchoring point and two bonding states were expected One originates primarily from the 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 The bistable states were switched by changing the gap size between the metal electrodes using an external force Notably it is difficult to change the electrical properties of bulk-state materials using mechanical force The findings reveal that the electron transport properties of a SMJ can be controlled by designing a proper metalmolecule interface which has considerable potential for molecular electronics Moreover this thesis will serve as a guideline for every step of SMJ research design fabrication evaluation and controlDesign and Control of Highly Conductive Single-Molecule Junctions EbookA Focus on the MetalMolecule Interface By Satoshi Kaneko Publisher Springer Print ISBN 9789811044113 9811044112 eText ISBN 9789811044120 9811044120 Copyright year 2017 Format PDF Available from 10900 USD SKU 9789811044120