Fig. 2From: LED control of gene expression in a nanobiosystem composed of metallic nanoparticles and a genetically modified E. coli strainCharacterization of synthesized AuNPs. A UV–vis absorption spectra of AuNPs; 30 min and 4 months after synthesis of the AuNPs. B Transmission electron microscopy image of AuNPs and C Particle diameter size distribution of synthesized AuNPsBack to article page