Fig. 2From: Facile Bottom-up Preparation of WS2-Based Water-Soluble Quantum Dots as Luminescent Probes for Hydrogen Peroxide and Glucosea X-ray diffraction patterns of WS2 QDs and CD/WS2 QD composite. b The atomic force microscopy topography image of as-prepared WS2 QDs. The height profile along the line overlaid on the image is shown in the inset. (color online)Back to article page