Aller au menu Aller au contenu
Synthèse et propriétés de monocristaux, de poudres, films minces ou hétérostructures

Etudes à l'interface avec la matière biologique

> LMGP_ Recherche > Funsurf

ACS Nano de Thomas Sanicolo 2018

Publié le 24 mai 2018
A+Augmenter la taille du texteA-Réduire la taille du texteImprimer le documentTélécharger au format PDFEnvoyer cette page par mail Partagez cet article Facebook Twitter Linked In Google+ Viadeo
Communiqué du 27 avril 2018 au 24 mai 2018

Le papier "Electrical Mapping of Silver Nanowire Networks: A Versatile Tool for Imaging Network Homogeneity and Degradation Dynamics during Failure" a été publié dans ACS Nano

acs.PNG

acs.PNG

Ici  vous trouverez le papier de Thomas Sannicolo

"Electrical stability and homogeneity of silver nanowire (AgNW) networks are critical assets for increasing their robustness and reliability when integrated as transparent electrodes in devices. Our ability to distinguish defects, inhomogeneities, or inactive areas at the scale of the entire network is therefore a critical issue. We propose one-probe electrical mapping (1P-mapping) as a specific simple tool to study the electrical distribution in these discrete structures. 1P-mapping has allowed us to show that the tortuosity of the voltage equipotential lines of AgNW networks under bias decreases with increasing network density, leading to a better electrical homogeneity. The impact of the network fabrication technique on the electrical homogeneity of the resulting electrode has also been investigated. Then, by combining 1P-mapping with electrical resistance measurements and IR thermography, we propose a comprehensive analysis of the evolution of the electrical distribution in AgNW networks when subjected to increasing voltage stresses. We show that AgNW networks experience three distinctive stages: optimization, degradation, and breakdown. We also demonstrate that the failure dynamics of AgNW networks at high voltages occurs through a highly correlated and spatially localized mechanism. In particular the in situ formation of cracks could be clearly visualized. It consists of two steps: creation of a crack followed by propagation nearly parallel to the equipotential lines. Finally, we show that current can dynamically redistribute during failure, by following partially damaged secondary pathways through the crack."


A+Augmenter la taille du texteA-Réduire la taille du texteImprimer le documentTélécharger au format PDFEnvoyer cette page par mail Partagez cet article Facebook Twitter Linked In Google+ Viadeo

Rédigé par Maria Carmen Jimenez Arevalo

mise à jour le 24 mai 2018

  • Tutelle CNRS
  • Tutelle Grenoble INP
Communauté Université Grenoble Alpes