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Gold nanoparticles and their polymer composites :

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Material Information

Title:
Gold nanoparticles and their polymer composites : synthesis characterization and applications
Physical Description:
Book
Language:
English
Creator:
Joshi, Nidhi
Publisher:
University of South Florida
Place of Publication:
Tampa, Fla
Publication Date:

Subjects

Subjects / Keywords:
Nanotechnology
Surface Plasmon Resonance
Biosensors
RSV
Catalyst
Dissertations, Academic -- Mechanical Engineering -- Masters -- USF   ( lcsh )
Genre:
non-fiction   ( marcgt )

Notes

Abstract:
ABSTRACT: Gold nanoparticles are excellent candidates for all the biomedical applications due to their size and shape dependent optical and physiological properties. In this study, gold nanoparticles were synthesized chemically for bio-application. It was observed that the size and shape of gold nanoparticles depend strongly on the concentration of chemical solution, type of reducing agent used in the reaction, temperature of the solution and stabilizing agent for reaction. Transmission electron microscopy (TEM) has been used extensively to determine the size and shape of the gold nanoparticles. Optical properties of the size and shape selected nanoparticles were studied using UV-vis spectrophotometer in absorption mode. The chemically synthesized gold nanoparticles were observed to show excellent absorption property which is reflected by the presence of the characteristic surface plasmon resonance (SPR) band peak. The SPR peak was found to be predominantly dependent on the size of nanoparticles. We have observed a strong red shift with increasing the size of gold nanoparticles. The position of the SPR peak was also observed to change with shape of gold nanostructures. Synthesis and characterization of the composites of gold nanoparticles and Poly (Oanisidine) (POAS) have been carried out in this thesis. Gold-POAS materials system was viii characterized using UV-vis spectroscopy, TEM, Fourier Transform Infrared Spectroscopy. The chemically synthesized gold nanoparticles were successfully utilized for the study of Respiratory Syncycial Virus (RSV) interaction. Gold nanoparticles were found to inhibit the RSV infection. The electrochemical behavior of gold nanoparticles was studied and their potentials for biosensing applications were tested. Cyclic voltaammetry was performed for the detection of dopamine and ascorbic acid using gold nanoparticles of different sizes. Interaction of gold nanoparticles with Bovine Serum Albumin (BSA) has been studied via absorption spectroscopy and TEM measurements. The absorption spectra of the GNP-BSA show remarkable shift in SPR band peak towards high wavelength. Catalytic properties of the gold nanoparticles were studied by using them as a catalytic activator for the gas sensing applications.
Thesis:
Thesis (MS)--University of South Florida, 2010.
Bibliography:
Includes bibliographical references.
System Details:
Mode of access: World Wide Web.
System Details:
System requirements: World Wide Web browser and PDF reader.
Statement of Responsibility:
by Nidhi Joshi.
General Note:
Title from PDF of title page.
General Note:
Document formatted into pages; contains X pages.

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
All applicable rights reserved by the source institution and holding location.
Resource Identifier:
usfldc doi - E14-SFE0004555
usfldc handle - e14.4555
System ID:
SFS0027870:00001


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Full Text

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Joshi, Nidhi.
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Gold nanoparticles and their polymer composites :
b synthesis characterization and applications
h [electronic resource] /
by Nidhi Joshi.
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[Tampa, Fla] :
University of South Florida,
2010.
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Thesis (MS)--University of South Florida, 2010.
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Includes bibliographical references.
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Text (Electronic thesis) in PDF format.
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Mode of access: World Wide Web.
System requirements: World Wide Web browser and PDF reader.
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ABSTRACT: Gold nanoparticles are excellent candidates for all the biomedical applications due to their size and shape dependent optical and physiological properties. In this study, gold nanoparticles were synthesized chemically for bio-application. It was observed that the size and shape of gold nanoparticles depend strongly on the concentration of chemical solution, type of reducing agent used in the reaction, temperature of the solution and stabilizing agent for reaction. Transmission electron microscopy (TEM) has been used extensively to determine the size and shape of the gold nanoparticles. Optical properties of the size and shape selected nanoparticles were studied using UV-vis spectrophotometer in absorption mode. The chemically synthesized gold nanoparticles were observed to show excellent absorption property which is reflected by the presence of the characteristic surface plasmon resonance (SPR) band peak. The SPR peak was found to be predominantly dependent on the size of nanoparticles. We have observed a strong red shift with increasing the size of gold nanoparticles. The position of the SPR peak was also observed to change with shape of gold nanostructures. Synthesis and characterization of the composites of gold nanoparticles and Poly (Oanisidine) (POAS) have been carried out in this thesis. Gold-POAS materials system was viii characterized using UV-vis spectroscopy, TEM, Fourier Transform Infrared Spectroscopy. The chemically synthesized gold nanoparticles were successfully utilized for the study of Respiratory Syncycial Virus (RSV) interaction. Gold nanoparticles were found to inhibit the RSV infection. The electrochemical behavior of gold nanoparticles was studied and their potentials for biosensing applications were tested. Cyclic voltaammetry was performed for the detection of dopamine and ascorbic acid using gold nanoparticles of different sizes. Interaction of gold nanoparticles with Bovine Serum Albumin (BSA) has been studied via absorption spectroscopy and TEM measurements. The absorption spectra of the GNP-BSA show remarkable shift in SPR band peak towards high wavelength. Catalytic properties of the gold nanoparticles were studied by using them as a catalytic activator for the gas sensing applications.
590
Advisor: Ashok Kumar, Ph.D.
653
Nanotechnology
Surface Plasmon Resonance
Biosensors
RSV
Catalyst
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Dissertations, Academic
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x Mechanical Engineering
Masters.
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t USF Electronic Theses and Dissertations.
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u http://digital.lib.usf.edu/?e14.4555