Positively-charged reduced graphene oxide as an adhesion promoter for preparing a highly-stable silver nanowire film

Qijun Sun, Seong Jun Lee, Hyungseok Kang, Yuseong Gim, Ho Seok Park, Jeong Ho Cho

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

An ultrathin conductive adhesion promoter using positively charged reduced graphene oxide (rGO-NH 3 + ) has been demonstrated for preparing highly stable silver nanowire transparent conductive electrodes (AgNW TCEs). The adhesion promoter rGO-NH 3 + , spray coated between the substrate and AgNWs, significantly enhances the chemical and mechanical stabilities of the AgNW TCEs. Besides, the ultrathin thickness of the rGO-NH 3 + ensures excellent optical transparency and mechanical flexibility for TCEs. The AgNW films prepared using the adhesion promoter are extremely stable under harsh conditions, including ultrasonication in a variety of solvents, 3M Scotch tape detachment test, mechanical bending up to 0.3% strain, or fatigue over 1000 cycles. The greatly enhanced adhesion force is attributed to the ionic interactions between the positively charged protonated amine groups in rGO-NH 3 + and the negatively charged hydroxo- and oxo-groups on the AgNWs. The positively charged GO-NH 3 + and commercial polycationic polymer (poly allylamine hydrochloride) are also prepared as adhesion promoters for comparison with rGO-NH 3 + . Notably, the closely packed hexagonal atomic structure of rGO offers better barrier properties to water permeation and demonstrates promising utility in durable waterproof electronics. This work offers a simple method to prepare high-quality TCEs and is believed to have great potential application in flexible waterproof electronics. This journal is

Original languageEnglish
Pages (from-to)6798-6804
Number of pages7
JournalNanoscale
Volume7
Issue number15
DOIs
Publication statusPublished - 2015 Apr 21

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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