Highly Conductive Paper/Textile Electrodes Using Ligand Exchange Reaction-Induced in Situ Metallic Fusion

Sungkun Kang, Donghyeon Nam, Jimin Choi, Jongkuk Ko, Donghee Kim, Cheong Hoon Kwon, June Huh, Jinhan Cho

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Here, we report that metal nanoparticle (NP)-based paper/textile electrodes with bulk metallic conductivity can be prepared via organic linker-modulated ligand exchange reaction and in situ room-temperature metallic fusion without additional chemical or thermal treatments. For this study, amine-functionalized molecule linkers instead of bulky polymer linkers were layer-by-layer (LbL)-assembled with tetraoctylammonium bromide (TOABr)-stabilized Au NPs to form Au NP multilayered films. By conversion of the amine groups of the organic molecule linkers from -NH 3 + to the -NH 2 groups, as well as by a decrease in the size of the organic linkers, the LbL-assembled Au NPs became highly interconnected and fused during LbL deposition, resulting in Au NP multilayers with adjustable conductivity and transport behavior. These phenomena were also predicted by a density functional theory investigation for the model system. Particularly, LbL-assembled films composed of TOABr-Au NPs and diethylenetriamine (M w : ∼104) exhibited a remarkable electrical conductivity of 2.2 × 10 5 S·cm -1 , which was higher than the electrical conductivity of the metal NP-based electrodes as well as the carbon material-based electrodes reported to date. Furthermore, based on our approach, a variety of insulating flexible papers and textiles were successfully converted into real metal-like paper and textile electrodes with high flexibility preserving their highly porous structure. This approach can provide a basis for further improving and controlling the electrical properties of flexible electrodes through the control of organic linkers.

Original languageEnglish
Pages (from-to)12032-12042
Number of pages11
JournalACS Applied Materials and Interfaces
Issue number12
Publication statusPublished - 2019 Mar 27


  • density functional theory
  • DETA ligand
  • ligand exchange reaction
  • metal nanoparticle
  • metallic fusion
  • metallic textile

ASJC Scopus subject areas

  • General Materials Science


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