A single molecule switch based on two Pd nanocrystals linked by a conjugated dithiol
Agrawal, Ved Varun · Thomas, Reji · Kulkarni, G. U. · Rao, C. N. R.
Original · EN
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. The I-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).
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