Optimization of an organic memristor as an adaptive memory element

Abstract

The combination of memory and signal handling characteristics of a memristor makes it a promising candidate for adaptive bioinspired information processing systems. This poses stringent requirements on the basic device, such as stability and reproducibility over a large number of training/learning cycles, and a large anisotropy in the fundamental control material parameter, in our case the electrical conductivity. In this work we report results on the improved performance of electrochemically controlled polymeric memristors, where optimization of a conducting polymer polyaniline in the active channel and better environmental control of fabrication methods led to a large increase both in the absolute values of the conductivity in the partially oxydized state of polyaniline and of the on-off conductivity ratio. These improvements are crucial for the application of the organic memristor to adaptive complex signal handling networks

Memristive-biosensors: A new detection method by using nanofabricated memristors

“…In all these structures, the memory effect depends on charge carriers rearrangement at the nanoscale as due to external perturbations [6]. These memory-effect devices have been fabricated by using different materials, including amorphous silicon [7], crystalline silicon [8], platinum/TiO 2 [9], platinum/organic-films [5], aniline-derivatized conductive-polymers [10], and graphene embedded in insulating polymers [11]. These devices have been proposed for different applications including digital [9] and analog [12] memories, logic [13] and neuromorphic [14][15][16] circuits.…”

Polysaccarides-based gels and solid-state electronic devices with memresistive properties: Synergy between polyaniline electrochemistry and biology

“…8 The current-voltage characteristics exhibited clear memristive features, hysteresis and rectification (figure 2 top), without significant variations even if LiClO 4 was added.…”

“…The electronic memristive devices were prepared following the procedure proposed by Berzina et al 8 Briefly, the deposition of PANI layers was carried out with a KSV 5000 LB trough, using a modified Langmuir-Schaefer (LS) technique. 28 Sixty molecular layers with a total thickness of about 100 nm were deposited onto glass substrates with chromium electrodes.…”

“…[1][2][3][4][5] The emulation of unique abilities of living beings by electronic devices is one of the main goals of bioelectronics. It was shown that polyaniline-based memristive networks [6][7][8][9] were able to reproduce a part of the pond snail nervous system (Hebbian learning). 10 Research frontiers are also oriented towards hybrid systems, where biological systems are key components of electronic devices.…”

First steps towards the realization of a double layer perceptron based on organic memristive devices

“…22. A solution of PANI (Mw≈100 000, Sigma Aldrich) was prepared with a concentration of 0.1 mg·mL 1 in 1-methyl-2-pyrrolidinone (Sigma Aldrich ACS reagent 99.0%) with the addition of 10% of Toluene (AnalaR NORMAPUR® ACS).…”