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Polyaniline-based memristors and the Red-ox mechanism of their operation .

Polyaniline-based memristors and the Red-ox mechanism of their operation. O.Bogomolova 1 , J.Boeva 1 , V.Sergeyev 1 , D.Godovsky 2 1 Moscow State University, Chemistry Dept., Vorobievy Gory, 1 Moscow 2 INEOS RAS, Vavilova str, 28, Moscow.

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Polyaniline-based memristors and the Red-ox mechanism of their operation .

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  1. Polyaniline-based memristors and the Red-ox mechanism of their operation. O.Bogomolova1, J.Boeva1, V.Sergeyev1, D.Godovsky2 1 Moscow State University, Chemistry Dept., Vorobievy Gory, 1 Moscow 2 INEOS RAS, Vavilova str, 28, Moscow

  2. Change of PANI conductivity depending on Red-Ox state

  3. Red-Ox states of Polyaniline and electrochemical transitions between them

  4. Electrochromic Smart Windows based on Polyaniline

  5. Measurement set up and methodology of experiment Measured film Electrochemical potentiostat SolutionLiClO4 acetonytile ITO glasses

  6. PANI in Solution of LiClO4/HCl: Cyclovoltammetry Cyclovoltammogramm in 0.1 M HCl in water Cyclovoltammogramm in 0.1 MHCl,0.1 MLiClO4 in acetonytrile

  7. Electrochromic cyclovoltammogramm

  8. Spectroelectrochemistry measurements Same, with memristive effect on absorbance spectra PANI film versus Pt, 0.1 M HCl in Water

  9. Film conductivity measurements Max I = 0.01 A PANI film conductivity, 0.1M HC water, Ag/AgCl Response of electron conductivity to step potential change from 0 to 0.4 V

  10. Memristivity: keeping conductance at switched voltage I, mA Cyclovoltammogramm ±2V Time,sec Supplied again 700mV Switch off at 700 mV • Memristive effect as from voltage switch off/ switch on. Device is switched off here

  11. Memristive effect movie

  12. Chemical structures of Polyaniline and Nafion

  13. It is a nanoheterogeneous material, domain size ca. 10 nm, both electron and ion conductivity is possible Structure of PANI-Nafion interpolyelectrolyte complex, made by matrix polymerization

  14. PANI-Nafion Polyelectrolyte complexes, LiClO4, acetonytrile Cyclovoltammogramm in 0.1MLiClO4, acetonytrile, versus Ag/AgCl Absorbance spectra of films during cyclovoltammetry

  15. Properties of PANI-Nafion in 0.1 M HCl in water Conductance through film in 0.1M HCl, water, Ag/AgCl I-V curve of electron conductivity in PANI-Nafion

  16. Neural networks applications Structure of perceptron type neural network made layer-by-layer of nanoparticles having 1:4:16 size ratio

  17. Conclusions Polymer electrochemistry is a complicated matter Polyaniline-based memristor operating mechanism is determined by change of Red-Ox states of PANi Probably TiO2 memristor operation is similar. It is not clear why PANI-Nafion films do not change Red-Ox states It is probably possible to make neural networks (perceptron type) on the basis of PANI-Nafion – Gold nanocomposites..

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