Fundamental property of new device of network of conducting polymers with fractal pattern

Conducting polymers with a fractal pattern have been prepared electrochemically and have been connected to each other. A network of conducting polymers similar to a neural network has been fabricated. The dopant used in the channels of the network of conducting polymers can be controlled by the current through the channels utilizing the property of a gel-conducting polymer such as poly (alkylthiophene). Thus the signal weight of the network of conducting polymers depends on the signals that flow through the network. This is called learning effect. In the case of a network of a single conducting polymer, it is hard to control the conductivity in the channels. In this paper, double or triple-layer conducting polymers have been used to achieve stable operation. Furthermore an alternative (sine wave) signal has been used to investigate the learning effect on the double layer conducting film.