Full text loading...
SEM image of MWNT (a) lying on two gold electrodes, separated by dielectric SiO2, (b) same tube after current induced breakdown.
(Color online) (a)-(f) Current sweep curves of the tube shown in Fig. 1; (a) voltages developed by 8, 15, and 40 μA current sweeps, a clear switching in voltage (from 1.7 to 0.5 V) can be seen for 15 μA_1 current sweep, (b) voltage sweep curves (in the voltage range −0.5 to 0.5 V) taken after different current sweeps, different slopes of the curves support resistivity changes observed in current sweep mode, (c) current sweep curves for 40 to 80 μA current, (d) voltage sweep curves corresponding to (c), (e), and (f) current sweep curves for higher currents (from 80 to 350 μA).
(Color online) (a) MWNT with Pt deposition at the portion of the tube between the two metal electrodes, the tube before metal deposition is shown in inset. (b) Current sweep curves of the metal deposited tube, no switching has been observed till the breakdown of the tube (breakdown shown in inset). (c) Voltage sweep curves of the tube with metal deposition. (d) HRTEM image of the metal deposited tubes. Arrows are shown to demark Pt metal particles intercalated in the graphitic walls of the tube. Inset shows the TEM image of metal deposited tube site.
Article metrics loading...