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Research Article Open access CC BY 4.0

An Overview of Nanoparticle Properties and Their Bioactivity

Chukwuemeka E. Nwankwo, Adewale Adewuyi, Adeleke Osho

International Journal of Biochemistry Research & Review · pp. 12–39 · Published 28 Jul 2023

10.9734/ijbcrr/2023/v32i5814

Abstract

The term “nanoparticles” being expressed in microbiology is coined from the Greek word “nano” meaning “dwarf”. Nanoparticles range in size from 1-100nm. Nanoparticles vary in size, shape, and other properties and can exist with capping agents present after structure-controlled synthesis with starting materials like metals with or without organic agents. This systematic literature review article discusses current opinions on the properties of nanoparticles including the size and shape, surface area and surface charge, surface chemistry and reactivity and their magnetic properties. We also discuss the mechanisms of bioactivity of nanoparticles in reference to their interactions with microorganisms, penetration into microorganisms, disruption of cellular processes and their effects on microbial growth. We also discuss specifically, their antibacterial, antifungal and antiviral properties. This is followed by a review of their diagnostic and therapeutic applications, the factors affecting nanoparticle bioactivity (exposure time and other intrinsic physicochemical properties) and how the intrinsic properties of microorganisms such as strain selection and growth conditions are affected by the activity of nanoparticles. In this review, we also compare nanoparticle research in the new world with activities in third world countries. We conclude by discussing the toxicity and safety concerns in the use of nanoparticles including the environmental impact and regulatory guidelines in the use of nanoparticles followed by a recommendation on future guidelines for research.

Nanoparticles bioactive antimicrobial properties bacteria antibacterial

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