Self-Assembly of Functionalized Oligothiophene into Hygroscopic Fibers: Fabrication of Highly Sensitive and Fast Humidity Sensors

SQUILLACI, Marco, CIPRIANI, Alessio, MELUCCI, Manuela, ZAMBIANCHI, Massimo, CAMINATI, Grabriella et SAMORÌ, Paolo, 2018. Self-Assembly of Functionalized Oligothiophene into Hygroscopic Fibers: Fabrication of Highly Sensitive and Fast Humidity Sensors. Advanced Electronic Materials [en ligne]. 2018. pp. 1700382. [Consultésans date]. DOI 10.1002/aelm.201700382. Consulté de : https://doi.org/10.1002/aelm.201700382A new symmetric oligothiophene exposing tetraethylene glycol (TEG)‐based side‐chains is designed and synthesized. This molecule is found to self‐assemble in solution forming supramolecular fibers, via π–π stacking between the conjugated oligothiophene backbones, which are phase segregated on the sub‐nanometer scale from the TEG side‐groups. The delocalization of the charges through the oligothiophene π–π stack ensures efficient charge transport while the hygroscopic shell, decorating the surface of the fibrillar structures, determines a certain affinity for polar molecules. Upon exposure to humidity, under environmental conditions, such supramolecular architectures are capable of reversibly absorbing and desorbing water molecules. Absorption of water molecules, due to increased environmental humidity, causes a fast and reproducible increase of the electrical current through the fibers by a factor 100 from 15% to 90% relative humidity, as measured in 2‐terminal devices. Such process is extremely fast, taking place in less than 45 ms. The humidity‐responsive characteristics of the presented oligothiophene‐based fibers can be exploited for the facile fabrication of high‐performances and solution‐processable electrical resistive humidity sensors.1. .
Accès libre Peer reviewed
Version acceptée pour publication (post-print auteur)
Paternité - Pas d'utilisation commerciale [CC] [BY] [NC]
Auteurs Marco Squillaci
Alessio Cipriani
Manuela Melucci
Massimo Zambianchi
Grabriella Caminati
Paolo Samorì
Unité de recherche du site

Institut de Science et d'Ingénierie Supramoléculaires - ISIS - UMR7006
URL éditeur https://doi.org/10.1002/aelm.201700382
Langue

en
Page de début

1700382
Date de première publication

2017-12-04
Date de parution

2018
ISSN

2199160X
Titre de la source (revue, livre…)

Advanced Electronic Materials
Résumé

A new symmetric oligothiophene exposing tetraethylene glycol (TEG)‐based side‐chains is designed and synthesized. This molecule is found to self‐assemble in solution forming supramolecular fibers, via π–π stacking between the conjugated
Show moreA new symmetric oligothiophene exposing tetraethylene glycol (TEG)‐based side‐chains is designed and synthesized. This molecule is found to self‐assemble in solution forming supramolecular fibers, via π–π stacking between the conjugated oligothiophene backbones, which are phase segregated on the sub‐nanometer scale from the TEG side‐groups. The delocalization of the charges through the oligothiophene π–π stack ensures efficient charge transport while the hygroscopic shell, decorating the surface of the fibrillar structures, determines a certain affinity for polar molecules. Upon exposure to humidity, under environmental conditions, such supramolecular architectures are capable of reversibly absorbing and desorbing water molecules. Absorption of water molecules, due to increased environmental humidity, causes a fast and reproducible increase of the electrical current through the fibers by a factor 100 from 15% to 90% relative humidity, as measured in 2‐terminal devices. Such process is extremely fast, taking place in less than 45 ms. The humidity‐responsive characteristics of the presented oligothiophene‐based fibers can be exploited for the facile fabrication of high‐performances and solution‐processable electrical resistive humidity sensors.
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DOI 10.1002/aelm.201700382
Éditeur

Wiley
Titre abrégé de la source

Adv. Electron. Mater.
Type de publication

ACL
Projet(s) de recherche ANR

ANR Labex project CSC (ANR-10- LABX-0026 CSC) within the Investissement d’Avenir program ANR-10-IDEX-0002-02
Projet(s) de recherche européen(s)

ERC project SUPRAFUNCTION (GA257305) ; Marie Sklodowska-Curie ITN projects iSwitch (GA N°642196) ; SYNCHRONICS (GA N°643238)
Domaine

Chimie/Matériaux
Mots-clés

humidity sensors
supramolecular fibers
bolaamphiphilic molecules
self-assembly
oligothiophenes
Unité de recherche extérieure au site

ISOF, CNR, Bologna, Italy
University of Florence, Dipartimento di Chimica “Ugo Schiff”, Sesto Fiorentino, Italy
Fonction

aut
Identifiant ORCID 0000-0001-6256-8281
Audience

International