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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Structural characterization. (a) TEM image and (b) HRTEM image of the as-synthesized 0D Bi QDs, (c) AFM image and (d) the corresponding height profile of the 0D Bi QDs, (e) Raman spectra of bulk Bi and 0D Bi QDs, and (f) UV-Vis-NIR spectrum.