fanqp

Nature, Published online: 26 October 2021; doi:10.1038/d41586-021-02958-w

Astronomers have found hints of what could be the first planet ever discovered outside our galaxy. Plus: A scientists’ guide to COP26, and a strikingly detailed look at the insides of cells.

Publication date: November 2016
Source:Organic Electronics, Volume 38
Author(s): S. Battistoni, A. Dimonte, V. Erokhin
Realizing element able to mimic some features of the human brain is a challenging perspective. The concept of organic devices, based on conductive polymers, is attracting significant interest being generally bio-compatible, able to work in liquid phase, with low bias voltage ranges. Organic memri-stive devices have demonstrated the capability of mimicking some properties of biological synapsis. Moreover, memristive devices based on polyaniline (PANI) have been used as artificial synapsis in the hardware of a single layer perceptron. In the perspective of a multi-layered perceptron, a fundamental step is the knowledge of the conductive state of each single memristor. The electrochromicity of PANI endows us to developed a non-invasive and precise method to solve this problem; in fact, PANI memristor's state (induced by the voltage biasing) can be monitored measuring its optical features variation by means of a spectrophotometer. The latter, thanks to its high accuracy, allows distinguishing minimal color variation at a micrometric distance and, without lowering its precision, can measure areas of 7 × 60 cm² in a single scan and reach, in several scans, a total area of 120 × 140 cm². Therefore, in future works we will extend the here proposed method in order to get, in a single scan, contact-less measurement and information about the state of each single PANI memristor belonging to a multi-layered perceptron.

Graphical abstract