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Light-enhanced liquid-phase exfoliation and current photoswitching in graphene–azobenzene composites

Multifunctional materials can be engineered by combining multiple chemical components, each conferring a well-defined function to the ensemble. Graphene is at the centre of an ever-growing research effort due to its combination of unique properties. Here we show that the large conformational change...

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Autores principales: Döbbelin, Markus, Ciesielski, Artur, Haar, Sébastien, Osella, Silvio, Bruna, Matteo, Minoia, Andrea, Grisanti, Luca, Mosciatti, Thomas, Richard, Fanny, Prasetyanto, Eko Adi, De Cola, Luisa, Palermo, Vincenzo, Mazzaro, Raffaello, Morandi, Vittorio, Lazzaroni, Roberto, Ferrari, Andrea C., Beljonne, David, Samorì, Paolo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4829665/
https://www.ncbi.nlm.nih.gov/pubmed/27052205
http://dx.doi.org/10.1038/ncomms11090
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author Döbbelin, Markus
Ciesielski, Artur
Haar, Sébastien
Osella, Silvio
Bruna, Matteo
Minoia, Andrea
Grisanti, Luca
Mosciatti, Thomas
Richard, Fanny
Prasetyanto, Eko Adi
De Cola, Luisa
Palermo, Vincenzo
Mazzaro, Raffaello
Morandi, Vittorio
Lazzaroni, Roberto
Ferrari, Andrea C.
Beljonne, David
Samorì, Paolo
author_facet Döbbelin, Markus
Ciesielski, Artur
Haar, Sébastien
Osella, Silvio
Bruna, Matteo
Minoia, Andrea
Grisanti, Luca
Mosciatti, Thomas
Richard, Fanny
Prasetyanto, Eko Adi
De Cola, Luisa
Palermo, Vincenzo
Mazzaro, Raffaello
Morandi, Vittorio
Lazzaroni, Roberto
Ferrari, Andrea C.
Beljonne, David
Samorì, Paolo
author_sort Döbbelin, Markus
collection PubMed
description Multifunctional materials can be engineered by combining multiple chemical components, each conferring a well-defined function to the ensemble. Graphene is at the centre of an ever-growing research effort due to its combination of unique properties. Here we show that the large conformational change associated with the trans–cis photochemical isomerization of alkyl-substituted azobenzenes can be used to improve the efficiency of liquid-phase exfoliation of graphite, with the photochromic molecules acting as dispersion-stabilizing agents. We also demonstrate reversible photo-modulated current in two-terminal devices based on graphene–azobenzene composites. We assign this tuneable electrical characteristics to the intercalation of the azobenzene between adjacent graphene layers and the resulting increase in the interlayer distance on (photo)switching from the linear trans-form to the bulky cis-form of the photochromes. These findings pave the way to the development of new optically controlled memories for light-assisted programming and high-sensitive photosensors.
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spelling pubmed-48296652016-04-22 Light-enhanced liquid-phase exfoliation and current photoswitching in graphene–azobenzene composites Döbbelin, Markus Ciesielski, Artur Haar, Sébastien Osella, Silvio Bruna, Matteo Minoia, Andrea Grisanti, Luca Mosciatti, Thomas Richard, Fanny Prasetyanto, Eko Adi De Cola, Luisa Palermo, Vincenzo Mazzaro, Raffaello Morandi, Vittorio Lazzaroni, Roberto Ferrari, Andrea C. Beljonne, David Samorì, Paolo Nat Commun Article Multifunctional materials can be engineered by combining multiple chemical components, each conferring a well-defined function to the ensemble. Graphene is at the centre of an ever-growing research effort due to its combination of unique properties. Here we show that the large conformational change associated with the trans–cis photochemical isomerization of alkyl-substituted azobenzenes can be used to improve the efficiency of liquid-phase exfoliation of graphite, with the photochromic molecules acting as dispersion-stabilizing agents. We also demonstrate reversible photo-modulated current in two-terminal devices based on graphene–azobenzene composites. We assign this tuneable electrical characteristics to the intercalation of the azobenzene between adjacent graphene layers and the resulting increase in the interlayer distance on (photo)switching from the linear trans-form to the bulky cis-form of the photochromes. These findings pave the way to the development of new optically controlled memories for light-assisted programming and high-sensitive photosensors. Nature Publishing Group 2016-04-07 /pmc/articles/PMC4829665/ /pubmed/27052205 http://dx.doi.org/10.1038/ncomms11090 Text en Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Döbbelin, Markus
Ciesielski, Artur
Haar, Sébastien
Osella, Silvio
Bruna, Matteo
Minoia, Andrea
Grisanti, Luca
Mosciatti, Thomas
Richard, Fanny
Prasetyanto, Eko Adi
De Cola, Luisa
Palermo, Vincenzo
Mazzaro, Raffaello
Morandi, Vittorio
Lazzaroni, Roberto
Ferrari, Andrea C.
Beljonne, David
Samorì, Paolo
Light-enhanced liquid-phase exfoliation and current photoswitching in graphene–azobenzene composites
title Light-enhanced liquid-phase exfoliation and current photoswitching in graphene–azobenzene composites
title_full Light-enhanced liquid-phase exfoliation and current photoswitching in graphene–azobenzene composites
title_fullStr Light-enhanced liquid-phase exfoliation and current photoswitching in graphene–azobenzene composites
title_full_unstemmed Light-enhanced liquid-phase exfoliation and current photoswitching in graphene–azobenzene composites
title_short Light-enhanced liquid-phase exfoliation and current photoswitching in graphene–azobenzene composites
title_sort light-enhanced liquid-phase exfoliation and current photoswitching in graphene–azobenzene composites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4829665/
https://www.ncbi.nlm.nih.gov/pubmed/27052205
http://dx.doi.org/10.1038/ncomms11090
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