A study on near-UV blue photoluminescence in graphene oxide prepared by Langmuir-Blodgett method

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Abstract

The paper reports a study on a near-UV blue photoluminescence (PL) in graphene oxide (GO) films prepared by Langmuir-Blodgett (LB)-based method. GO films was reduced into reduced-graphene oxide (rGO) through thermal process at 800 °C. The surface morphology of both GO and rGO is characterized by atomic force microscope (AFM) and scanning electron microscope (SEM). X-ray photoelectron spectroscopy (XPS) analysis shows the largely restoration of graphitic domains in GO after reduction. The photoluminescence (PL) of rGO shows the near-UV blue emission, which is blueshifted along with luminescent decreased as compared to GO. This blueshift and decrease in PL is mainly due to the newly formed sp 2 clusters in rGO, which established percolation pathways between the sp 2 clusters already present.

Original languageEnglish
Pages (from-to)18-23
Number of pages6
JournalApplied Surface Science
Volume345
DOIs
StatePublished - 2015

Keywords

  • Graphene oxide films
  • Langmuir-Blodgett method
  • Photoluminescence

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