ΑAu2S nanoparticles: Fungal-mediated synthesis, structural characterization and bioassay. Issue 1 (2nd January 2022)

• Record Type: Journal Article
• Authors: Syed, Asad; Al Saedi, Marzouq H.; Bahkali, Ali H.; Elgorgan, Abdallah M.; Kharat, Mahesh; Pai, Kalpana; Pichtel, John; Ahmad, Absar
• Is Part Of: Green chemistry letters and reviews. Volume 15:Issue 1(2022)
• Page Start: 61
• Page End: 70
• Publication Date: 2022-01-02
• Subjects: Gold sulfide -- biosynthesis -- Humicola sp -- promastigote -- cytotoxicity -- hemolysis; Green chemistry -- Periodicals; 540
• DOI: 10.1080/17518253.2021.1999509
• Languages: English
• ISSNs: 1751-8253

Abstract

ABSTRACT : Luminescent nanoparticles synthesized via bio-based protocols that generate nanoparticles having different chemical compositions along with other functionalities (size and morphology) have received huge attention. We have focused our research on gold sulfide nanoparticles (Au2 S NPs) and have biosynthesized these NPs using the fungus Humicola sp. The nanoparticles were characterized by Transmission Electron Microscopy, which showed spherical morphology of Au2 S. UV–Visible-NIR spectrophotometry, luminescence spectrophotometry, Selected Area Electron Diffraction, Energy Dispersive Analysis of X-rays, and X-ray diffraction were performed. FTIR confirmed that the fungal metabolites including biomolecules secreted in the reaction medium are primarily responsible for nanoparticle synthesis and stabilization. The fungus reduced the precursor solution (HAuCl4 and Na2 SO3 ) and at the same time capped them with secreted biomolecules. The anti-leishmanial activity of Au2 S NPs was determined against L. donovani promastigote (Ag83 strain). Au2 S NPs displayed less cytotoxicity towards both normal and cancer (Daudi, ZR-75-1) cell lines. Hemocompatibility was determined via hemolysis assays. This novel fungal-based system demonstrates an economical and environmentally benign process for biosynthesis of Au2 S nanoparticles which may find application in bioimaging and labeling studies. GRAPHICAL ABSTRACT: UF0001