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Title: A single molecule switch based on two Pd nanocrystals linked by a conjugated dithiol
Authors: Agrawal, Ved Varun
Thomas, Reji
Kulkarni, G U
Rao, C N R
Keywords: conducting molecule
scanning tunneling microscopy
negative differential resistance
Negative Differential Resistance
Self-Assembled Monolayers
Atomic-Force Microscopy
Issue Date: Nov-2005
Publisher: Indian Academy of Sciences
Citation: Pramana-Journal of Physics 65(5), 769-775 (2005)
Abstract: Tunneling spectroscopy measurements have been carried out on a single molecule device formed by two Pd nanocrystals (dia. similar to 5 nm) electronically coupled by a conducting molecule, dimercaptodiphenylacetylene. The I-V data, obtained by positioning the tip over a nanocrystal electrode, exhibit negative differential resistance (NDR) oil a background M-I-M characteristics. The NDR, feature occurs at similar to 0.67 V at 300 K and shifts to a higher bias of 1.93 V at 90 K. When the tip is held in the middle region of the device, a Coulomb blockade region is observed (+/-similar to 0.3 V).
Other Identifiers: 0304-4289
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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