title: Optimization of process parameters of polymer solution mediated growth of calcium carbonate nanoparticles.
abstract: With the advent of nanotechnology, many methods of synthesis of nanoparticles have come into practice and the 'polymer mediated growth' technique is among them. In this route, ions of one of the reactants are allowed to diffuse from an external solution into a polymer matrix where the other reactant is complexed and bound. The exact role of ionic diffusion in the formation of nanoparticles was investigated in the current study by studying the patterns of kinetics of nanoparticle formation using UV vis spectroscopy. Typically, calcium carbonate nanoparticles were formed by the aforementioned technique using polyethylene glycol solution. The particle size was calculated using Scherrer's formula on x-ray diffraction plots and was reconfirmed with field emission scanning electron microscope and transmission electron microscope images. Energy-dispersive x-ray analysis was used to study the composition and purity of the nanoparticles formed. The reactant to polymer ratio, reaction temperature and molecular weight of polyethylene glycol affected the size of the particles formed. Through this knowledge we optimized these parameters to obtain particles as small as 20 nm and confirmed that this technique can be used to control the size of nanoparticles.
authors.affiliation: Molecular Toxicology Laboratory, Center for Biotechnology and Biomedical Sciences, Norfolk State University, Norfolk, VA 23504, USA.
authors.forename: Santoshkumar
authors.initials: S
authors.lastname: Biradar
authors.forename: Virupaxi
authors.initials: V
authors.lastname: Goornavar
authors.forename: Adaikkappan
authors.initials: A
authors.lastname: Periyakaruppan
authors.forename: Jessica
authors.initials: J
authors.lastname: Koehne
authors.forename: Robert
authors.initials: R
authors.lastname: Jeffers
authors.forename: Joseph C
authors.initials: JC
authors.lastname: Hall
authors.forename: Vani
authors.initials: V
authors.lastname: Ramesh
authors.forename: M
authors.initials: M
authors.lastname: Meyyappan
authors.forename: Govindarajan T
authors.initials: GT
authors.lastname: Ramesh
mesh_terms: D002119:Calcium Carbonate / Q000737:chemistry*; D004058:Diffusion; D007477:Ions / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology; D010316:Particle Size; D011092:Polyethylene Glycols / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D007477:Ions; D011092:Polyethylene Glycols; D002119:Calcium Carbonate