Synthesis of Gold-Iron Oxide Composite Nanoparticles Using Tea Extract

By: Ghosh , AritriContributor(s): Paria, Santanu [Supervisor] | Department of Chemical EngineeringMaterial type: TextTextLanguage: English Publisher: 2014Description: 85 pSubject(s): Engineering and Technology | Chemical Engineering | NanotechnologyOnline resources: Click here to access online Dissertation note: Thesis (M.Tech (R))- National Institute of Technology, Rourkela Summary: The modernization of current industries and technologies needs day by day smaller nanoparticles in the form of microprocessors, chips, sensors, machines, devices etc. As a result the existing methods of fabrication are slowly becoming obsolete. The fabrica tion of cytocompatible nanoparticles at small scale requires an inexpensive and promising technique. This work explores the formation of composite nanostructures using gold and iron oxide nanoparticles in a aqueous one - pot synthesis pathway. Advances in n anoscale level studies have enabled diversification of nanoparticles applications in human healthcare. Several of these biomedical applications comprise use of bioferrofluids i.e. biocompatible colloidal solutions of magnetic nanoparticles, coated with org anic or inorganic materials allowing applications specific functionalization. Most of the literature shows usage of complex chemical routes for formation of magnetic nanoparticle, which initiated the pursuit for more environmentally accepted synthesis rout es as these produce more biocompatible, stable, and well dispersed nanoparticles in less time than the chemical routes. Among this green route synthesis procedures, usage of plant extract is more suitable as the end product can be easily collected and sepa rated from biomass. The different complexities of magnetic nanoparticles like cytotoxicity, spontaneously oxidizable surface in physiological conditions and less surface functionalization can be modified by addition of gold nanoparticle. In this study we i nvestigate the use of a single plant leaf (Tea) extract as both the reducing agent and a dispersing agent to synthesize iron and gold nanoparticle, and a composite particle of iron - gold nanoparticle, and to characterize the properties of the synthesized n anoparticles.
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Thesis (M.Tech (R))- National Institute of Technology, Rourkela

The modernization of current industries and technologies needs day by day smaller nanoparticles
in the form of microprocessors, chips, sensors, machines, devices etc. As a result the existing
methods of fabrication are slowly becoming obsolete. The fabrica
tion of cytocompatible
nanoparticles at small scale requires an inexpensive and promising technique. This work
explores the formation of composite nanostructures using gold and iron oxide nanoparticles in a
aqueous one
-
pot synthesis pathway.
Advances in n
anoscale level studies have enabled diversification of nanoparticles
applications in human healthcare. Several of these biomedical applications comprise use of
bioferrofluids i.e. biocompatible colloidal solutions of magnetic nanoparticles, coated with
org
anic or inorganic materials allowing applications specific functionalization. Most of the
literature shows usage of complex chemical routes for formation of magnetic nanoparticle, which
initiated the pursuit for more environmentally accepted synthesis rout
es as these produce more
biocompatible, stable, and well dispersed nanoparticles in less time than the chemical routes.
Among this green route synthesis procedures, usage of plant extract is more suitable as the end
product can be easily collected and sepa
rated from biomass. The different complexities of
magnetic nanoparticles like cytotoxicity, spontaneously oxidizable surface in physiological
conditions and less surface functionalization can be modified by addition of gold nanoparticle. In
this study we i
nvestigate the use of a single plant leaf (Tea) extract as both the reducing agent
and a dispersing agent to synthesize iron and gold nanoparticle, and a composite particle of iron
-
gold nanoparticle, and to characterize the properties of the synthesized n
anoparticles.

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