Understanding the Performance of a Nanocomposite Based on a Conjugated Azo‐Polymer and Reduced Graphene Oxide with Photoelectrically Switchable Properties by Analyzing the Potential Profile during Photocurrent Generation

This work describes the photoelectrochemical properties of devices coated with poly(azo‐Bismarck Brown R) and the nanocomposite poly(azo‐Bismarck Brown R)/reduced graphene oxide. Chronoamperometric methods with pulsed light are applied to the polymer surfaces of poly(azo‐Bismarck R) and poly(azo‐Bis...

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Bibliographic Details
Published in:Macromolecular chemistry and physics 2020-09, Vol.221 (18), p.n/a
Main Authors: Pacheco, Jéssica Crivelaro, Olean‐Oliveira, André, Teixeira, Marcos F. S.
Format: Article
Language:English
Subjects:
2D layered materials
Carrier mobility
conducting polymer
driven‐light
Graphene
nanocomposite
Nanocomposites
Nanomaterials
Oxidation
Photoelectric effect
Photoelectric emission
Polymers
Resistance
resistive switching properties
Response time
Switches
Valence
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Summary:This work describes the photoelectrochemical properties of devices coated with poly(azo‐Bismarck Brown R) and the nanocomposite poly(azo‐Bismarck Brown R)/reduced graphene oxide. Chronoamperometric methods with pulsed light are applied to the polymer surfaces of poly(azo‐Bismarck R) and poly(azo‐Bismarck Brown R)/rGO nanocomposites at two applied potentials (corresponding to the reduced and oxidized polymer forms) to obtain information on the photocurrent in a short response time. The results indicate that the photoactivity of the nanomaterial depends on the oxidation state of the azo‐polymer and its chemical structure. The carrier mobility of the material is affected by the applied potential profile and consequently by the isomerism of the polymer backbone. This behavior explains the photoelectrochemical performance of the nanocomposite material. The photoresponsiveness of the semiconducting hybrid material with light‐switchable conductance is promising for applications in photoelectrochemical switches and molecular switching devices. Properties of poly(azo‐BBR) are useful evidence of the dynamics of the polymer as a photoelectrochemical switcher and molecular switching device for external stimuli. The nanocomposite film exhibit interesting photosynergetic properties based on the redox properties of the azo‐polymer combined with the good electronic conductivity and stability of graphene.
ISSN:1022-1352
1521-3935
DOI:10.1002/macp.202000225