What is it about?
We observed a wide range of tunable visible to NIR emissions with good stability from the C-QD colloids at different applied excitation wavelengths. The colloids show dual emissions with maxima at ∼420 and 775 nm (blue and NIR emissions) when excited at the wavelength range near the energy gaps of the C-QDs.
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Why is it important?
Our findings show that carbon dots have wavelength tunability in the visible to near-infrared region.
Perspectives
These observations suggest that we need stable oxide-related surface characteristics to provide the high-intensity blue and NIR emissions of the C-QDs, which can be applicable in photonics and medicine.
Dr. Morteza Sasani Ghamsari
Read the Original
This page is a summary of: Wavelength-tunable visible to near-infrared photoluminescence of carbon dots: the role of quantum confinement and surface states, Journal of Nanophotonics, June 2016, SPIE,
DOI: 10.1117/1.jnp.10.026028.
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