Graphene nanoribbons inducing cube-shaped Ag nanoparticle assemblies

Jéssica E.S. Fonsaca, Ana Laura Elías, Sergio H. Domingues, Marcela M. Oliveira, Morinobu Endo, Elisa S. Orth, Mauricio Terrones, Aldo J.G. Zarbin

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Here we report the synthesis of cube-like Ag-nanoparticle (Ag-NP) agglomerates using functionalized graphene nanoribbons (GNR) as templates. The morphology and size of the resulting Ag assemblies are carefully controlled by changing the surface activity of the GNR through chemical functionalization. We propose a mechanism explaining the cube-like organization of the Ag-NP. In particular, the functionalized ribbons first organize in a cubic/rectangular shape, and subsequently thiol moieties preferentially anchor on the edges of the ribbons favoring their surface passivation with Ag-NPs. Furthermore, we found these Ag agglomerates serve as efficient substrate for the Raman detection of 4-aminothiophenol (4-ATP) molecules, through a surface enhancement Raman phenomenon. We believe these novel Ag-NP nanocomposites could also find applications as bactericides, catalysts and electrically conducting fillers.

Original languageEnglish (US)
Pages (from-to)800-811
Number of pages12
JournalCarbon
Volume93
DOIs
StatePublished - Aug 8 2015

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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