Polypyrrole doped with Toluene-p-sulfonate (PPy (TOS)) has been prepared electrochemically at different current densities. It was found that, electrical conductivity (#sigma#) has a great dependence on the current density i.e., (#sigma#=approx0.17 and 50 S/cm at j=0.5 and 7.5 mA/cm~2 respectively). conductivity has been fitted according to Mott's equation in a wi8de range of temperature from 18 K to 200 K with a good agreement in 3D-system. In addition, it was observed that, polypyrrole samples have a strong positive magnetoresistance at very low temperatures and it has a quadratic behavior at small magnetic fields, up to H=5T.
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机译：掺杂配甲苯-P-磺酸盐（PPY（TOS））的聚吡咯已经在不同电流密度下电化学制备。 结果发现，导电率（＃sigma＃）对电流密度的很大依赖性，（#sigma＃=约0.17和50 s / cm分别为7.5 mA / cm〜2）。 通过在18 k到200 k的Wi8DE温度范围内的Mott的方程根据3D-System的协议，根据Mott的方程式安装了电导率。 另外，观察到，在非常低的温度下，聚吡咯样品具有强阳性磁阻，并且在小磁场下具有二次行为，最高可达H = 5t。
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