Optical Input/Electrical Output Memory Elements based on a Liquid Crystalline Azobenzene Polymer

Onglets principaux

Mosciatti, T., Bonacchi, S., Gobbi, M., Ferlauto, L., Liscio, F., Giorgini, L., … Samori, P. (sans date). Optical Input/Electrical Output Memory Elements based on a Liquid Crystalline Azobenzene Polymer. Acs Applied Materials & Interfaces, 8(10), 6563-6569. doi:10.1021/acsami.5b12430
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Titre / Title

Optical Input/Electrical Output Memory Elements based on a Liquid Crystalline Azobenzene Polymer
Licence CC / CC licence

Paternité - Pas d'utilisation commerciale [CC] [BY] [NC]
Version / Version

Version acceptée pour publication (post-print auteur)
Auteurs / Authors Thomas Mosciatti
Sara Bonacchi
Marco Gobbi
Laura Ferlauto
Fabiola Liscio
Loris Giorgini
Emanuele Orgiu
Paolo Samori
Unité de recherche du site / Intern department

Institut de Science et d'Ingénierie Supramoléculaires - ISIS - UMR7006
URL éditeur / URL publisher http://pubs.acs.org/doi/abs/10.1021/acsami.5b12430
Langue / Language

en
Volume

8
Numéro / Issue

10
Page de début / Start Page

6563
Page de fin / End Page

6569
Date de première publication / Date Issued

2016-02-18
ISSN

1944-8244
1944-8252
Titre de la revue/du livre/de la source / Journal/book/host title

ACS Applied Materials & Interfaces
Résumé / Abstract

Responsive polymer materials can change their properties when subjected to external stimuli. In this work, thin films of thermotropic poly(metha)acrylate/azobenzene polymers are explored as active layer in light-programmable, electrically readable
Show moreResponsive polymer materials can change their properties when subjected to external stimuli. In this work, thin films of thermotropic poly(metha)acrylate/azobenzene polymers are explored as active layer in light-programmable, electrically readable memories. The memory effect is based on the reversible modifications of the film morphology induced by the photoisomerization of azobenzene mesogenic groups. When the film is in the liquid crystalline phase, the trans → cis isomerization induces a major surface reorganization on the mesoscopic scale that is characterized by a reduction in the effective thickness of the film. The film conductivity is measured in vertical two-terminal devices in which the polymer is sandwiched between a Au contact and a liquid compliant E-GaIn drop. We demonstrate that the trans → cis isomerization is accompanied by a reversible 100-fold change in the film conductance. In this way, the device can be set in a high- or low-resistance state by light irradiation at different wavelengths. This result paves the way toward the potential use of poly(metha)acrylate/azobenzene polymer films as active layer for optical input/electrical output memory elements.
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DOI 10.1021/acsami.5b12430
Titre abrégé de la revue/du livre/de la source / Abbreviated journal/book/host title

ACS Appl. Mater. Interfaces
Type de publication / Publication Type

ACL
Domaine / Topic

Chimie/Matériaux
Mots-clés / Keywords

azobenzene
memory device
multifunctional device
photochromic polymers
polymeric liquid crystals
Unité de recherche extérieure au site / Extern department

Istituto per la Microelettronica e Microsistemi (IMM)-CNR, via Piero Gobetti 101, 40129 Bologna, Italy
Dipartimento di Chimica Industriale “Toso Montanari”, Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
Fonction / Role

aut
crp
Audience / Audience

International