Photoluminescence and electrochemical investigation of curcumin-reduced graphene oxide sheets |
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Authors: | Shadie Hatamie Mohammad Mahdi Ahadian Azam Iraji zad Omid Akhavan Effat Jokar |
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Affiliation: | 1.Stem Cell Technology Research Center,Tehran,Iran;2.Institute for Nanoscience and Nanotechnology (INST),Sharif University of Technology,Tehran,Iran;3.Department of Physics,Sharif University of Technology,Tehran,Iran |
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Abstract: | This paper reports on a novel low-temperature method for preparing curcumin-reduced graphene oxide (Cur-rGO) from graphene oxide (GO) and investigates their cyclic voltammetry (CV) and photoluminescence (PL) properties. GO sheets were synthesized using modified Hummers’ method and then were chemically reduced using polyphenol curcumin into graphene sheets. Atomic force microscopy, transmission electron microscopy and x-ray photoelectron spectroscopy were used to confirm the formation of Cur-rGO and revealed their functionalization with polyphenol curcumin. The electrochemical and optical properties of the Cur-rGO sheets were investigated using CV and PL spectroscopy. According to the PL and CV characterization for the Cur-rGO sheets, charges and resonant energy were transferred from curcumin molecules to the GO sheets’ surfaces. This arises from the bonding of the fluorescence curcumin molecules to the Cur-rGO surfaces, through π–π stacking of their aromatic rings. It should be noted that curcumin molecules act as electron donors, suppressing the fluorescence of the GO sheets while improving their electrochemical activities. |
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