Figure 1From: Gold nanoparticles synthesized by Geobacillus sp. strain ID17 a thermophilic bacterium isolated from Deception Island, AntarcticaID17 and gold nanoparticles production. (A) Spectra of gold nanoparticles production in the course of time at 0 (●), 3 (○), 9 (▼) and 16 (Δ) h of incubation; (B) Transmission electron micrograph. Black spots corresponding to gold nanoparticles and arrow show digital zoom where quasi-hexagonal shapes are shown; (C) Gold nanoparticles produced by the microorganism on a copper grille (scale bars correspond to 200 nm). (D) Histogram distribution (obtained using Sigma Plot 11.0 software) that shows the particle size distribution (obtained with NIS-Elements D 3.10 software).Back to article page