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Updated: Aug 7, 2026
09:09
Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes
Published on: December 15, 2015
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Methyl Methacrylate Copolymer with Pendant Thioxanthenone Groups as Active Layer for Resistive Memory Devices
Danila S Odintsov1, Andrei A Gismatulin1, Inna K Shundrina1
1Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation.
Summary
A novel electro-active copolymer, poly(MMA-co-ThS), exhibits electrochromic properties and enables memristive device switching. This material shows potential for advanced electronic applications due to its unique charge transport mechanisms.
Area of Science:
- Polymer Science
- Materials Science
- Electrochemistry
Background:
- Development of electro-active materials is crucial for advanced electronic devices.
- Thioxanthone derivatives offer unique electrochemical and optical properties.
- Copolymerization allows tuning of material characteristics for specific applications.
Purpose of the Study:
- Synthesize and characterize a novel electro-active copolymer: poly(methyl methacrylate-co-2-((4-acroylpiperazine-1-yl)methyl)-9H-thioxanthene-9-one) (poly(MMA-co-ThS)).
- Investigate the electrochemical, electrochromic, and charge transport properties of poly(MMA-co-ThS) thin films.
- Explore the potential of poly(MMA-co-ThS) in memory devices by examining its memristive behavior.
Main Methods:
- Radical polymerization was employed to synthesize the poly(MMA-co-ThS) copolymer.
- Thin films of the copolymer were fabricated on silicon wafers for device fabrication.
- Electrochemical and electrochromic measurements were conducted to assess material activity.
- Current-voltage characteristics at varying temperatures were analyzed to determine charge transport mechanisms, utilizing the Nasyrov-Gritsenko model.
- Memristive switching behavior in n++/Si(100)/poly(MMA-co-ThS)/Al devices was investigated.
Main Results:
- The synthesized poly(MMA-co-ThS) copolymer demonstrated good solubility, thermal stability (up to 282°C), and film-forming capabilities.
- Poly(MMA-co-ThS) films exhibited electrochemical and electrochromic activity, forming long-lived radical anion states with optical absorption in the visible region (500-900 nm).
- Charge transport in the films was identified as a multiphonon mechanism, consistent with the Nasyrov-Gritsenko model, with trap optical transition energy Wopt = 1.8 eV, matching the thioxanthone structure.
- The n++/Si(100)/poly(MMA-co-ThS)/Al device displayed a memristive effect, showing reversible ON/OFF switching after an initial forming cycle.
Conclusions:
- The synthesized poly(MMA-co-ThS) copolymer possesses significant electrochemical and electrochromic properties.
- The charge transport mechanism is well-described by phonon-assisted tunneling, with thioxanthone groups acting as traps.
- The material demonstrates memristive behavior, indicating its potential for application in non-volatile memory devices.
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