Nuclear chemistry

Spectroscopy

Quantum mechanics

Ultraviolet

Composite number

Engineering

Transmission electron microscopy

Nanoparticle

Photochemistry

Materials science

Chromatography

Dynamic light scattering

Photoluminescence

Carbon fibers

Chemical engineering

Quantum yield

Physics

Nanotechnology

Optics

Hydrothermal circulation

X-ray photoelectron spectroscopy

Luminescence

Fluorescence

Composite material

Analytical Chemistry (journal)

Spectrophotometry

Chemistry

Fourier transform infrared spectroscopy

Quantum dot

Optoelectronics

Journal of Nanotechnology

Highly luminescent carbon dots (C-dots) were synthesized by the one-pot simple hydrothermal method directly from lemon juice using different temperatures, time, aging of precursors, and diluted solvents to control the luminescence of C‐dots. The obtained C-dots were characterized by high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectrophotometry, dynamic light scattering, ultraviolet-visible spectrophotometry, and photoluminescent spectrophotometry. The results show that C‐dots had strong green light emission with quantum yield in the range of 14.86 to 24.89% as a function of hydrothermal temperatures. Furthermore, light emission that is dependent on hydrothermal time, aging of precursor, and diluted solvent was observed. These results suggest that the C‐dots have potential application in optoelectronics and bioimaging.

Green Synthesis of Highly Luminescent Carbon Quantum Dots from Lemon Juice