Organic molecules in an electrical circuit: An AFM study of a negative-differential-resistance molecule

Ganesh K. Ramachandran, Adam M. Rawlett, Theresa J. Hopson, Larry A. Nagahara, Raymond K. Tsui, Stuart Lindsay

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

2,5-di(phenylethynyl)-4′4″-dithiolate-l-nitrobenzene has been shown to exhibit negative differential resistance (NDR) and spontaneous switching when inserted into inert molecular monolayers between metal contacts. We have used conducting atomic force microscopy to measure the electronic properties of individual dithiolated molecules 2,5-di(phenylethynyl)-4′4″-dithiolate-l-nitrobenzene and 2,5-di(phenylethynyl)-4′4″-thioacetyl-benzene inserted into an alkanethiol monolayer and chemically bonded to gold nano-contacts to form a covalently-connected molecular circuit (bonded contacts). The data show qualitative agreement with previously published results for similar molecules deposited in a nanopore containing several hundred molecules, allowing us to make the important conclusion that the measured negative differential resistance (NDR) is native to the molecule and not an intermolecular phenomenon.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium - Proceedings
EditorsS.C. Moss
Pages211-215
Number of pages5
Volume728
StatePublished - 2002
EventFunctional Nanostructured Materials through Multiscale Assembly and Novel Pattering Techniques - San Francisco, CA, United States
Duration: Apr 2 2002Apr 5 2002

Other

OtherFunctional Nanostructured Materials through Multiscale Assembly and Novel Pattering Techniques
CountryUnited States
CitySan Francisco, CA
Period4/2/024/5/02

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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