A novel strategy for the synthesis of gold nanoparticles with Catharanthus roseus cell suspension culture

摘要

The purpose of this research was to develop a green method to synthesise gold nanoparticles (Au NPs) with cell suspension cultures of Catharanthus roseus. Reaction mixtures containing cell-free culture filtrate of C. roseus and gold III ions, which was initially pale yellow, turned wine red after 24-h incubation due to Au NP formation. UV-Vis spectra of the reaction mixtures showed a characteristic absorption peak at 546 nm. The biosynthesised NPs were predominantly spherical with 2-20 nm size; their crystalline nature was revealed by X-ray diffraction patterns. FTIR analysis indicated that Au NPs were capped by amide characteristic of plant proteins, which makes them apt for various applications. (C) 2018 Elsevier B.V. All rights reserved.