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(a) Scanning electron microscope (SEM) and (b) Energy-dispersive X-ray (EDX) profile of WDL-AuNPs. (c) Transmission electron microscope (TEM) micrograph of the 1 mM AuCl4− ions with WDL showing synthesized AuNPs. Purified NPs from WDL were examined by electron microscopy. The range of observed diameters of the synthesized AuNPs was about 20 to 50 nm. (d) Selected area diffraction (SAED) pattern.
