Abstract
Application of green methods to replace physical and chemical methods for synthesis of silver nanoparticles (AgNPs) has become necessary not only from economic aspect but especially due to its significant impact on ecosystem. The properties of biologically synthesized AgNPs using green algae Parachlorella kessleri (P. kessleri) and chemically prepared were investigated and compared. The UVvis analysis confirmed a high stability of biosynthesized AgNPs as well as chemically synthesized gelatin modified citrate-AgNPs. Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) revealed different sizes and shapes of AgNPs synthesized in different ways. Biosynthesized AgNPs have similar inhibitory antimicrobial activity as gelatin/sodium citrate–AgNPs.
Highlights
In recent years the use of noble metal nanomaterials in many industrial applications including physics, chemistry, electronics, optics, material science has rapidly increased
As reaction time increased more amine residues of gelatine were being released into the reaction system and reduction of silver ions slowly proceeded [12]
Our results indicated that biosynthesized AgNPs have similar inhibitory antimicrobial activity as gelatin/sodium citrate-AgNPs against biofilm formation and owing to their easy and inexpansive synthesis appear to be good alternative to chemically prepared AgNPs
Summary
In recent years the use of noble metal nanomaterials in many industrial applications including physics, chemistry, electronics, optics, material science has rapidly increased. Physical and chemical methods generally used for AgNPs synthesis very often involved toxic chemicals that can contaminate the nanoparticles [6]. Such nanoparticles are released into environment in different stages of their production, apllication and even disposal of nanowastes what can lead to contamination of the whole ecosystem. There is a need to replace physical and chemical techniques of AgNPs preparation by green alternatives, which are cost-effective, safe, environment-friendly and scaled up for large syntheses of NPs. The use of biomolecules like proteins and lipids present on NPs surfaces has a great potential in AgNPs synthesis due to their non-toxic nature and gentle synthetic procedures [9, 10]. There is a growing concern to apply biomimetic which use plants, bacteria, fungi, yeast, actinomycetes and algae for synthesis of nanostructures of biocompatible metals and semiconductors [5]
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