Co-operative behavior of a multi-component system

The co-operative nature of the SWCNTs and PEDOT PSS in the SWCNT/PS/PEDOT PSS system is investigated by altering the ratio of the two components via two methods. The resultant percolation thresholds were evaluated and models proposed to explain the cooperative behavior. From this point, the two routes followed are referred to as methods 1 and 2. 

The introduction of a second colloidal component, whether it is a particle, micelle, or dissolved polymer, can induce depletion-induced attraction forces. - These forces can lead to the manipulation of the percolation network structure. The role of colloidal structures that can contribute to the final conducting percolation network has previously been modeled. - It was shown in these works that 

The values for the theoretical predictions were determined using Equation 6.3 with values for f of 1 and 2 nm. These predictions model a gradual decrease in the overall percolation threshold upon the addition of the SWCNTs. From the experimental data a steep drop in the percolation threshold with the introduction of a small fraction of SWCNTs can be observed. The gradient of this drop is larger than that observed for the addition of PEDOT PSS. This could 

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