Jump to main content
Jump to site search

Issue 29, 2013
Previous Article Next Article

Graphene oxide sheets as a template for dye assembly: graphene oxide sheets induce H-aggregates of pyronin (Y) dye

Author affiliations

Abstract

The highly stable colloidal structure of graphene oxide (GO) in aqueous dispersion behaves as a platform for the molecular aggregation of dyes via a simple adsorption process. The interaction between dye and GO sheets is a critical factor for dye aggregation. Positively charged dyes interact with the negatively charged GO sheets in an aqueous dispersion via both electrostatic and π–π stacking interactions. The cationic nature of Pyronin Y (PyY) ensures that the dye molecules are quickly adsorbed on the GO sheets in the aqueous dispersion. GO–PyY composites with different ratios, which are stable for months, are prepared by simply mixing diluted aqueous dispersions of both components. Transition dipole–dipole interactions between the adsorbed dye molecules on the surface of the GO sheet causes the formation of H-aggregates of the dye at dilute concentrations. H-aggregates of PyY are characterized by spectroscopic techniques (UV-Vis, steady-state and time-resolved fluorescence spectroscopy). The morphology and thickness of the GO sheets and the dye adsorbed GO sheets were determined using atomic force microscopy (AFM) in tapping mode. AFM studies revealed that a great deal of PyY molecules interact on the edges of the GO sheets.

Graphical abstract: Graphene oxide sheets as a template for dye assembly: graphene oxide sheets induce H-aggregates of pyronin (Y) dye

Back to tab navigation

Supplementary files

Publication details

The article was received on 30 Jan 2013, accepted on 01 May 2013 and first published on 01 May 2013


Article type: Paper
DOI: 10.1039/C3RA40531A
Citation: RSC Adv., 2013,3, 11832-11838
  •   Request permissions

    Graphene oxide sheets as a template for dye assembly: graphene oxide sheets induce H-aggregates of pyronin (Y) dye

    M. Şinoforoğlu, B. Gür, M. Arık, Y. Onganer and K. Meral, RSC Adv., 2013, 3, 11832
    DOI: 10.1039/C3RA40531A

Search articles by author

Spotlight

Advertisements