Interface electrode-SWNT

Figure 10.4 shows the saturation current at maximum gate voltage for two adjacent sets of transistors, both with 15 jam lines, as a function of 1/L. The results are internally consistent - e.g. maximum on currents scaling roughly linearly with 1/L for a given array of transistors. The one data point outside linear behavior was from a device that had a visible break in one of the source/drain electrodes. The linear dependence extrapolated to zero shows a relatively low contact resistance at the DNNSA-PANI/SWNT pentacene interface [15]. 

The development of transparent conductive electrodes based on SWNT thin films represented an outstanding scientific breakthrough for applications in the area of optoelectronics. However, to build integrated CNT-polymer-based systems it is necessary to engineer the interfaces between the two constituents through organized nanotube architectures. 

Figure 4.15 (a) SECM arrangement (not to scale) for feedback measurement at pure (left) and SWNTs-lm-sandwiched (right) water/chloroform interface (b) Experimental approach curves (CHI 900) for a tip in aqueous solution approaching SWNTs-Im-sandwiched (I) and pure (II) water/chloroform interface. Currents are normalized to the steady-state diffusion limiting current, /jco and distance to tip radius. The aqueous solution contained 0.5 mM Ru(NH3) and 100 mM KCI. The tip (Pt, 10 mm radius, RG = 10) was held at -0.35 V vs. Ag AgCl (saturated KCI) for Ru(NH3) reduction and approached at 1 pm/s. The counter electrode was Pt wire [58]. Reproduced by permission of The Royal Society of Chemistiy. 

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