Fig. 1From: A Simple Approach for Synthesizing of Fluorescent Carbon Quantum Dots from Tofu Wastewater a TEM images for CQDs in deionized water (CQDs-1) and b TEM images for CQDs in NaOH solution (CQDs-2). c, d Zoomed-in image of a single CQD of a and b, respectivelyBack to article page