Insight into the kinetically and thermodynamically controlled biosynthesis of silver nanoparticles. Issue 9 (4th November 2020)

• Record Type: Journal Article
• Authors: Anand, Shreya; Pandiyan Kuppusamy, Raghu Raja; Padmanabhan, Padmini
• Is Part Of: IET nanobiotechnology. Volume 14:Issue 9(2020)
• Page Start: 864
• Page End: 869
• Publication Date: 2020-11-04
• Subjects: enthalpy -- light scattering -- nanofabrication -- crystallisation -- enzymes -- silver -- nanoparticles -- nanobiotechnology -- chemical equilibrium -- reaction kinetics -- spectrochemical analysis -- molecular biophysics; synthesis path -- classical kinetics -- metal NP -- model metal -- crystallisation process -- inductively coupled plasma‐optical emission spectroscopy -- alpha‐amylase solution -- silver nitrate solution -- kinetics model -- silver nanoparticles -- nanoparticle synthesis -- material properties -- kinetically controlled biosynthesis -- thermodynamically controlled biosynthesis -- biological approach -- enzyme -- dynamic light scattering spectra -- enthalpy -- activation energy -- equilibrium constant -- reaction kinetics -- Ag; Biotechnology -- Periodicals; Nanotechnology -- Periodicals; 660.6
• DOI: 10.1049/iet-nbt.2019.0373
• Languages: English
• ISSNs: 1751-8741

Abstract

Abstract : The mechanism of nanoparticles (NPs) synthesis is a crucial prerequisite for the engineering of desirable material properties and is elusive due to the difficulty of studying the synthesis path and also due to lack of published work. The present study moves beyond the current conventional study of characterisation of NPs synthesis. It focuses on study of classical kinetics of metal NP using silver as a model metal to perform the required experiments, it aimed at understanding the crystallisation process which is the major root for the synthesis of metal NP. The authors have chosen biological approach to explain the process of synthesis of metal NP using inductively coupled plasma – optical emission spectroscopy that directly analyses the concentration of metal NPs. Alpha‐amylase solution, when incubated with silver nitrate solution, turned brown at a specific concentration of enzyme and substrate, which shows the formation of silver NPs. Inductively coupled plasma data and dynamic light scattering spectra were studied to understand the kinetics and the kinetics model was obtained. The enthalpy (Δ H *), activation energy (Δ E *), and equilibrium constant ( K ) were calculated for understanding the thermodynamics of the reaction. The process of NP synthesis is dependent on the kinetics of the reaction, and other process parameters limit the thermodynamics of the process.