Self-assembly of graphene onto electrospun polyamide 66 nanofibers as transparent conductive thin films

Yuan Li Huang, Avinash Baji, Hsi Wen Tien, Ying Kui Yang, Shin Yi Yang, Chen Chi M. Ma, Hong Yuan Liu, Yiu Wing Mai, Nian Hau Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

51 Citations (Scopus)

Abstract

A simple method was developed to assemble graphite oxide (GO) densely onto electrospun (ES) polyamide 66 (PA66) nanofibrous membranes, used as a guide for the deposition of graphene nanosheet (GNS) conductive networks for preparing transparent conductive thin film (TCF). The main advantage of this technique by comparison with previous methods is that graphene does not form a uniform coating, but a percolated conductive network, when guided by PA66 nanofiber templates. A low surface coverage of the transparent substrate by GNS resulted in high transmittance. Polyvinylpyrrolidone-stabilized GO (PVP-GO) was prepared as a modifier for improving the adsorption to the nanofibers. The resulting PVP-GO material could adsorb well on PA66 nanofibers due to stronger hydrogen bonds. Hence, a lower sufficient concentration of PVP-GO (0.050wt%) solution was required than that for GO solution (0.100wt%) to fabricate a complete conductive path through a possible enriched adsorption process. For TCF applications, a reduction step is essential because as-deposited GO is non-conductive. In this work, we reduced GO to GNS by a combination of chemical reduction and thermal annealing. The TCF optical transmittance also could be improved after thermal annealing at 350 °C above the PA66 melting point. Light scattering by PA66 nanofibers was found as the main cause of reduced transmittance. A fused film, obtained after electrospinning PA66 solution for 120s, and immersing in 0.050wt% PVP-GO solution, exhibits a surface resistance of 8.6 × 10 3δ, while maintaining 88% light transmittance.

Original languageEnglish
Article number475603
JournalNanotechnology
Volume22
Issue number47
DOIs
Publication statusPublished - 25 Nov 2011
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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