Current--voltage characteristics of an individual helical CdS nanowire rope

This paper studies the electronic transport in an individualhelically twisted CdS nanowire rope, on which platinum microleads areattached by focused-ion beam deposition. The current--voltage ($I-V$)characteristics are nonlinear from 300 down to 60,K. Some step-likestructures in the $I-V$ curves and oscillation peaks in thedifferential conductance (d$I$/d$V-V$) curves have been observed evenat room temperature. It proposes that the observed behaviour can beattributed to Coulomb-blockade transport in the one-dimensional CdSnanowires with diameters of 6--10,nm.