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Microbial exopolysaccharide-mediated synthesis and stabilization of metal nanoparticles. | LitMetric

Microbial exopolysaccharide-mediated synthesis and stabilization of metal nanoparticles.

Crit Rev Microbiol

a Department of Biological Engineering , College of Engineering, Konkuk University, Seoul , South Korea.

Published: November 2017

AI Article Synopsis

  • Exopolysaccharides (EPSs) are biopolymers produced by microorganisms that help them survive in tough environments, and they have valuable properties for various industries.
  • These EPSs can facilitate the creation of metallic nanoparticles through a green synthesis method that is safe and environmentally friendly, acting as natural capping agents to enhance the stability of the nanoparticles.
  • The review highlights the mechanisms behind EPS-mediated metal reduction, along with the potential applications for these metal nanoparticles in various fields.

Article Abstract

Exopolysaccharides (EPSs) are structurally and functionally valuable biopolymer secreted by different prokaryotic and eukaryotic microorganisms in response to biotic/abiotic stresses and to survive in extreme environments. Microbial EPSs are fascinating in various industrial sectors due to their excellent material properties and less toxic, highly biodegradable, and biocompatible nature. Recently, microbial EPSs have been used as a potential template for the rapid synthesis of metallic nanoparticles and EPS-mediated metal reduction processes are emerging as simple, harmless, and environmentally benign green chemistry approaches. EPS-mediated synthesis of metal nanoparticles is a distinctive metabolism-independent bio-reduction process due to the formation of interfaces between metal cations and the polyanionic functional groups (i.e. hydroxyl, carboxyl and amino groups) of the EPS. In addition, the range of physicochemical features which facilitates the EPS as an efficient stabilizing or capping agents to protect the primary structure of the metal nanoparticles with an encapsulation film in order to separate the nanoparticle core from the mixture of composites. The EPS-capping also enables the further modification of metal nanoparticles with expected material properties for multifarious applications. The present review discusses the microbial EPS-mediated green synthesis/stabilization of metal nanoparticles, possible mechanisms involved in EPS-mediated metal reduction, and application prospects of EPS-based metal nanoparticles.

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Source
http://dx.doi.org/10.1080/1040841X.2017.1306689DOI Listing

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