Electrical measurements of a dithiolated electronic molecule via conducting atomic force microscopy

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

doi:10.1063/1.1512815

Electrical measurements of a dithiolated electronic molecule via conducting atomic force microscopy

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

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169 Scopus citations

Abstract

We describe a method of measuring the electrical properties of a molecule via conducting atomic force microscopy (AFM). A dithiolated molecule is chemically inserted into defect sites in an insulating self-assembled monolayer formed on an epitaxial Au substrate and the top thiol terminus of the molecule is reacted with a Au nanoparticle. A Au-coated AFM probe is used to contact the molecule through the nanoparticle, thus electrical data can be obtained. We report preliminary transport measurements of two test molecules. Our data shows qualitative agreement with previously published results for similar molecules deposited in a nanopore containing approximately a thousand molecules. This work indicates that the measured negative differential resistance is not an intermolecular phenomenon.

Original language	English (US)
Pages (from-to)	3043-3045
Number of pages	3
Journal	Applied Physics Letters
Volume	81
Issue number	16
DOIs	https://doi.org/10.1063/1.1512815
State	Published - Oct 14 2002

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Electrical measurements of a dithiolated electronic molecule via conducting atomic force microscopy",

abstract = "We describe a method of measuring the electrical properties of a molecule via conducting atomic force microscopy (AFM). A dithiolated molecule is chemically inserted into defect sites in an insulating self-assembled monolayer formed on an epitaxial Au substrate and the top thiol terminus of the molecule is reacted with a Au nanoparticle. A Au-coated AFM probe is used to contact the molecule through the nanoparticle, thus electrical data can be obtained. We report preliminary transport measurements of two test molecules. Our data shows qualitative agreement with previously published results for similar molecules deposited in a nanopore containing approximately a thousand molecules. This work indicates that the measured negative differential resistance is not an intermolecular phenomenon.",

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AU - Nagahara, Larry A.

AU - Tsui, Raymond K.

AU - Ramachandran, Ganesh K.

AU - Lindsay, Stuart

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N2 - We describe a method of measuring the electrical properties of a molecule via conducting atomic force microscopy (AFM). A dithiolated molecule is chemically inserted into defect sites in an insulating self-assembled monolayer formed on an epitaxial Au substrate and the top thiol terminus of the molecule is reacted with a Au nanoparticle. A Au-coated AFM probe is used to contact the molecule through the nanoparticle, thus electrical data can be obtained. We report preliminary transport measurements of two test molecules. Our data shows qualitative agreement with previously published results for similar molecules deposited in a nanopore containing approximately a thousand molecules. This work indicates that the measured negative differential resistance is not an intermolecular phenomenon.

AB - We describe a method of measuring the electrical properties of a molecule via conducting atomic force microscopy (AFM). A dithiolated molecule is chemically inserted into defect sites in an insulating self-assembled monolayer formed on an epitaxial Au substrate and the top thiol terminus of the molecule is reacted with a Au nanoparticle. A Au-coated AFM probe is used to contact the molecule through the nanoparticle, thus electrical data can be obtained. We report preliminary transport measurements of two test molecules. Our data shows qualitative agreement with previously published results for similar molecules deposited in a nanopore containing approximately a thousand molecules. This work indicates that the measured negative differential resistance is not an intermolecular phenomenon.

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Electrical measurements of a dithiolated electronic molecule via conducting atomic force microscopy

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