NDLI: Thermopower distribution of single molecule junctions with different interaction types

Content Provider	Springer Nature Link
Author	Kim, Taekyeong
Copyright Year	2015
Abstract	The thermopower (S) distribution in single-molecule junctions with different interaction types were investigated by using a scanning tunneling microscope break-junction (STM-BJ) technique. We used 4,4’-bipyridine (BPy) and 1,2-bis(4-pyridyl)ethylene (BPyE) molecules, each having the Van der Waals (vdW) interaction between a pyridine ring and a Au atom and a donor-acceptor (DA) interaction between a nitrogen(N) atom and a Au atom, depending on the different binding geometries formed with the Au electrodes. From the full width at half maximum (FWHM) in the distribution of S, we found that S had a smaller variation for the vdW interaction compared to the DA interaction, due to the high binding stability of vdW interaction. Furthermore, we measured the molecular bonding forces which are in the range of 1.5 nN - 1.8 nN for the vdW interaction and 0.8 nN for the DA interaction. This confirms that the bonding is stronger for the vdW interaction than for the DA interaction, which is consistent with the experimental results for the S distributions as well as those for the molecular bonding stabilities.
Starting Page	1553
Ending Page	1557
Page Count	5
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	67
Issue Number	9
e-ISSN	19768524
Language	English
Publisher	The Korean Physical Society
Publisher Date	2015-11-19
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pyridine Thermopower Theoretical, Mathematical and Computational Physics Van der Waals interaction Donor-acceptor interaction Bonding stability Physics Particle and Nuclear Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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