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    • Keywords


      Conducting molecule; nanocrystals; scanning tunneling microscopy; negative differential resistance

    • Abstract


      Tunneling spectroscopy measurements have been carried out on a single molecule device formed by two Pd nanocrystals (dia. ∼5 nm) electronically coupled by a conducting molecule, dimercaptodiphenylacetylene. TheI-V data, obtained by positioning the tip over a nanocrystal electrode, exhibit negative differential resistance (NDR) on a background M-I-M characteristics. The NDR feature occurs at ∼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 (±∼0.3 V)

    • Author Affiliations


      Ved Varun Agrawal1 Reji Thomas1 G U Kulkarni1 C N R Rao1

      1. Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore - 560 064, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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