Organic memristors: Exploring polymers with carbazole functional side groups

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F24%3A63588678" target="_blank" >RIV/70883521:28610/24:63588678 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/70883521:28110/24:63588678

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Organic memristors: Exploring polymers with carbazole functional side groups

Popis výsledku v původním jazyce

Newly prepared n-alkyl methacrylate and dithienopyrrole polymers with carbazole functional side groups have been demonstrated to have memristive properties. Polymers with different backbone structures, side chain lengths and various substituents on the carbazole functional group were prepared. The influence of the chemical structure of these polymers on both the physical properties ( energy profile, thermal, dielectric, and photophysical) and memristive properties was studied. As-prepared polymers were further utilised to create two-terminal electronic devices for electrical measurements by depositing a thin polymer layer onto ITOcoated glass by spin-coating or direct electropolymerization and then depositing a layer of aluminium. The DC I-V response ofthe polymer-based devices was characterized by an erratic and bi-stable response, while their AC I-V response exhibited a pinched hysteresis loop when measured between 1-100 Hz. For polymers with rigid structure (high glass transition temperature (Tg) caused by short n-alkyl side chain or bulky side groups ), their pinched hysteresis loop was characterized by &quot;jump transitions&quot; indicative of hi-stability, while polymers with loose structure (low Tg) had a pinched hysteresis loop that was smooth in appearance. The later mentioned polymer-based devices could transition through a multitude of conductance states when exposed to voltage-varying pulses, allowing the device to exhibit spike-timing-dependent-plasticity.

Název v anglickém jazyce

Organic memristors: Exploring polymers with carbazole functional side groups

Popis výsledku anglicky

Newly prepared n-alkyl methacrylate and dithienopyrrole polymers with carbazole functional side groups have been demonstrated to have memristive properties. Polymers with different backbone structures, side chain lengths and various substituents on the carbazole functional group were prepared. The influence of the chemical structure of these polymers on both the physical properties ( energy profile, thermal, dielectric, and photophysical) and memristive properties was studied. As-prepared polymers were further utilised to create two-terminal electronic devices for electrical measurements by depositing a thin polymer layer onto ITOcoated glass by spin-coating or direct electropolymerization and then depositing a layer of aluminium. The DC I-V response ofthe polymer-based devices was characterized by an erratic and bi-stable response, while their AC I-V response exhibited a pinched hysteresis loop when measured between 1-100 Hz. For polymers with rigid structure (high glass transition temperature (Tg) caused by short n-alkyl side chain or bulky side groups ), their pinched hysteresis loop was characterized by &quot;jump transitions&quot; indicative of hi-stability, while polymers with loose structure (low Tg) had a pinched hysteresis loop that was smooth in appearance. The later mentioned polymer-based devices could transition through a multitude of conductance states when exposed to voltage-varying pulses, allowing the device to exhibit spike-timing-dependent-plasticity.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA24-10384S" target="_blank" >GA24-10384S: Polymerní memristory s neurosynaptickými vlastnostmi</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů