Interactions at the graphene/polyaniline interface: electron donation from graphene to polyaniline and stabilization of polarons

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F25%3A00639928" target="_blank" >RIV/61388955:_____/25:00639928 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0370591" target="_blank" >https://hdl.handle.net/11104/0370591</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s42114-025-01432-9" target="_blank" >10.1007/s42114-025-01432-9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interactions at the graphene/polyaniline interface: electron donation from graphene to polyaniline and stabilization of polarons

Popis výsledku v původním jazyce

This study aims to fill in the gaps in the experiment-based fundamental knowledge on the interaction of graphene and polyaniline at the ´molecular´ level, namely, charge redistribution and nature of charge carriers in polyaniline. We synthesized a two-dimensional graphene/polyaniline heterostructure and studied electronic structure and interactions of its components. The charge-transfer measurements showed that the formed polyaniline acts as a p-type dopant of graphene: the graphene electrons are accepted by polyaniline within the Fermi level alignment process. Raman and XPS spectroscopies and Raman spectroelectrochemistry on the (13C-)graphene/polyaniline interface reveal that the majority of polyaniline is in the polaron lattice form and a minority in the bipolaronic form. The XPS data show that the number of polyaniline charged nitrogen atoms exceeds the number of counter-anions, indicating that the proton doping of polyaniline as the main mechanism of polaron formation/stabilization is accompanied by a second mechanism, in which polarons and bipolarons are stabilized by graphene electrons in a mutual interaction. The work provides essential knowledge needed for a rational design of graphene/polyaniline nanocomposites and their exploitation in various devices.

Název v anglickém jazyce

Interactions at the graphene/polyaniline interface: electron donation from graphene to polyaniline and stabilization of polarons

Popis výsledku anglicky

This study aims to fill in the gaps in the experiment-based fundamental knowledge on the interaction of graphene and polyaniline at the ´molecular´ level, namely, charge redistribution and nature of charge carriers in polyaniline. We synthesized a two-dimensional graphene/polyaniline heterostructure and studied electronic structure and interactions of its components. The charge-transfer measurements showed that the formed polyaniline acts as a p-type dopant of graphene: the graphene electrons are accepted by polyaniline within the Fermi level alignment process. Raman and XPS spectroscopies and Raman spectroelectrochemistry on the (13C-)graphene/polyaniline interface reveal that the majority of polyaniline is in the polaron lattice form and a minority in the bipolaronic form. The XPS data show that the number of polyaniline charged nitrogen atoms exceeds the number of counter-anions, indicating that the proton doping of polyaniline as the main mechanism of polaron formation/stabilization is accompanied by a second mechanism, in which polarons and bipolarons are stabilized by graphene electrons in a mutual interaction. The work provides essential knowledge needed for a rational design of graphene/polyaniline nanocomposites and their exploitation in various devices.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Advanced Composites and Hybrid Materials

ISSN

2522-0128

e-ISSN

2522-0136

Svazek periodika

8

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

20

Strana od-do

381

Kód UT WoS článku

001586623400022

EID výsledku v databázi Scopus

2-s2.0-105017645467