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Title: An atomic force microcopy study of the mechanical and electricalproperties of monolayer films of molecules with aromatic end groups

Abstract

The effect of intermolecular {pi}-{pi} stacking on the electrical and mechanical properties of monolayer films molecules containing aromatic groups was studied using atomic force microscopy. Two types of aromatic molecules, (4-mercaptophenyl) anthrylacetylene (MPAA) and (4-mercaptophenyl)-phenylacetylene (MPPA) were used as model systems with different {pi}-{pi} stacking strength. Monolayer films of these molecules on Au(111) surfaces exhibited conductivities differing by more than one order of magnitude, MPAA being the most conductive and MPPA the least conductive. The response to compressive loads by the AFM tip was also found to be very different for both molecules. In MPAA films distinct molecular conductivity changes are observed upon mechanical perturbation. This effect however was not observed on the MPPA film, where intermolecular {pi}-{pi} interactions are likely weaker.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Director. Office of Science. Basic EnergySciences
OSTI Identifier:
929051
Report Number(s):
LBNL-63408
Journal ID: ISSN 0743-7463; LANGD5; R&D Project: 517950; BnR: KC0203010; TRN: US200815%%205
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Langmuir
Additional Journal Information:
Journal Volume: 23; Journal Issue: 23; Related Information: Journal Publication Date: 2007; Journal ID: ISSN 0743-7463
Country of Publication:
United States
Language:
English
Subject:
36; AROMATICS; ATOMIC FORCE MICROSCOPY; ELECTRICAL PROPERTIES; MECHANICAL PROPERTIES

Citation Formats

Fang, Liang, Park, J Y, Ma, H, Jen, A K.-Y., and Salmeron, M. An atomic force microcopy study of the mechanical and electricalproperties of monolayer films of molecules with aromatic end groups. United States: N. p., 2007. Web. doi:10.1021/la701489p.
Fang, Liang, Park, J Y, Ma, H, Jen, A K.-Y., & Salmeron, M. An atomic force microcopy study of the mechanical and electricalproperties of monolayer films of molecules with aromatic end groups. United States. https://doi.org/10.1021/la701489p
Fang, Liang, Park, J Y, Ma, H, Jen, A K.-Y., and Salmeron, M. 2007. "An atomic force microcopy study of the mechanical and electricalproperties of monolayer films of molecules with aromatic end groups". United States. https://doi.org/10.1021/la701489p. https://www.osti.gov/servlets/purl/929051.
@article{osti_929051,
title = {An atomic force microcopy study of the mechanical and electricalproperties of monolayer films of molecules with aromatic end groups},
author = {Fang, Liang and Park, J Y and Ma, H and Jen, A K.-Y. and Salmeron, M},
abstractNote = {The effect of intermolecular {pi}-{pi} stacking on the electrical and mechanical properties of monolayer films molecules containing aromatic groups was studied using atomic force microscopy. Two types of aromatic molecules, (4-mercaptophenyl) anthrylacetylene (MPAA) and (4-mercaptophenyl)-phenylacetylene (MPPA) were used as model systems with different {pi}-{pi} stacking strength. Monolayer films of these molecules on Au(111) surfaces exhibited conductivities differing by more than one order of magnitude, MPAA being the most conductive and MPPA the least conductive. The response to compressive loads by the AFM tip was also found to be very different for both molecules. In MPAA films distinct molecular conductivity changes are observed upon mechanical perturbation. This effect however was not observed on the MPPA film, where intermolecular {pi}-{pi} interactions are likely weaker.},
doi = {10.1021/la701489p},
url = {https://www.osti.gov/biblio/929051}, journal = {Langmuir},
issn = {0743-7463},
number = 23,
volume = 23,
place = {United States},
year = {Thu Sep 06 00:00:00 EDT 2007},
month = {Thu Sep 06 00:00:00 EDT 2007}
}