Figure 3

(a) Digital photographs of dispersion solutions after ultrasonication (top) and separated supernatants after centrifugation with Tyndall effect (bottom). (b) UV-vis-NIR absorption spectra of the dispersion solutions.

(a) Digital photographs of dispersion solutions after ultrasonication (top) and separated supernatants after centrifugation with Tyndall effect (bottom). (b) UV-vis-NIR absorption spectra of the dispersion solutions.