Abstract
In this paper, a lab experiment to demonstrate quantum phenomena was developed using carbon quantum dots (CQDs), a new carbon-based fluorescent nanomaterial, discovered in 2004. Therefore, a practical class was developed to demonstrate quantum phenomena using cheap and safe chemical products. Over 140 students from biotechnology, pharmacy, engineers and geology courses have successfully performed the proposed lab experiment. By following a short, easy and totally safe procedure, the students were able to synthesize CQDs, as well as to visualize the quantum phenomena related to the light scattering, absorption and emission. It was also possible to obtain the absorption spectrum of the CQD sample, with an absorption band at 325 nm. Additionally, a wavelength-dependent behavior was observed for the synthesized CQDs. This may be used to deeply study quantum confinement effects. Therefore, CQDs can be a powerful and versatile tool to learn about quantum phenomena in nanomaterials.
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