Covalent-cross-linked plasmene nanosheets

Yiyi Liu, Bo Fan, Qianqian Shi, Dashen Dong, Shu Gong, Bowen Zhu, Runfang Fu, San H. Thang, Wenlong Cheng

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)

Abstract

Thiol-polystyrene (SH-PS)-capped plasmonic nanoparticles can be fabricated into free-standing, one-nanoparticle-thick superlattice sheets (termed plasmene) based on physical entanglement between ligands, which, however, suffer from irreversible dissociation in organic solvents. To address this issue, we introduce coumarin-based photo-cross-linkable moieties to the SH-PS ligands to stabilize gold nanoparticles. Once cross-linked, the obtained plasmene nanosheets consisting of chemically locked nanoparticles can well maintain structural integrity in organic solvents. Particularly, arising from ligand-swelling-induced enlargement of the interparticle spacing, these plasmene nanosheets show significant optical responses to various solvents in a specific as well as reversible manner, which may offer an excellent material for solvent sensing and dynamic plasmonic display.

Original languageEnglish
Pages (from-to)6760-6769
Number of pages10
JournalACS Nano
Volume13
Issue number6
DOIs
Publication statusPublished - 30 May 2019

Keywords

  • covalent-cross-linked
  • gold nanoparticles
  • plasmene nanosheets
  • plasmonic switching
  • solvent responsive

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