Fig. 4From: In vitro biosynthesis of Ag, Au and Te-containing nanostructures by Exiguobacterium cell-free extractsCharacterization of gold nanostructures. Electron micrographs (left) and EDS analysis (right) of in vitro generated Au-NS, under aerobic (a) and anaerobic (b) conditions by crude extracts of E. acetylicum MF03; AuNS generated under aerobic (c) and anaerobic (d) conditions by E. aurantiacum MF06Back to article page