Journal
NEW JOURNAL OF CHEMISTRY
Volume 45, Issue 28, Pages 12549-12556Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nj01655e
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This study successfully prepared fluorescent green carbon quantum dots using latex of Ficus benghalensis and polyethyleneimine, and applied them for tyrosine detection and Schottky barrier diode fabrication.
In this article, a facile and straightforward approach has been designed for the preparation of fluorescent green carbon quantum dots (G-CQDs) from the latex of Ficus benghalensis as the carbon source and polyethyleneimine as the nitrogen source. Various instrumental techniques such as transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infra-red spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) were employed to characterize G-CQDs. Interestingly, the as-prepared CQDs exhibited green fluorescence with a 41.2% quantum yield and showed excitation-dependent emission. The G-CQDs were applied as a fluorescent probe for the selective and sensitive detection of tyrosine (Tyr) with a detection limit of 0.13 mu M. Furthermore, to explain the quenching mechanism, a fluorescence lifetime experiment was performed. In addition to this, the detection of Tyr was performed in milk samples. Based on their semiconducting properties, the synthesized G-CQDs were effectively applied to fabricate a Schottky barrier diode on an indium doped tin oxide (ITO) substrate. On the whole, this work is a novel illustration of the demanding optoelectronic device application of G-CQDs.
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