Romanov, Vyacheslav N.
(2005)
UNIFIED MICROSCOPY AND SPECTROSCOPY FOR NANOSCALE CHEMICAL IMAGING.
Doctoral Dissertation, University of Pittsburgh.
(Unpublished)
Abstract
Chemical imaging with nanometer scale resolution requires integration of the microscopic and spectroscopic analyses within a new conceptual framework that takes into account quantum size effects and evanescent electromagnetic fields. This work has focused on nanometer scale effects of changes in reflectance spectra of materials near resonances. Two types of resonances were considered. A surface plasmon resonance of metallic nanometer-sized particles reflecting UV/Visible light was studied in application to silver diffusion and cluster growth in glass matrix. The resonance is a result of energy and momentum being transferred from incident photons into surface plasmons, and is sensitive to the refractive index of the host medium and the particle size. A combination of the Mie theory, with quantum size corrections and simulations of ion-exchange diffusion was utilized to interpret the findings of microscopic and spectroscopic experimental studies.A single vibrational mode of di-iron nonacarbonyl was used as a reference in developing high resolution chemical imaging. A near field equivalent of the Lorentzian shape has been discovered, both experimentally and theoretically, to have an oscillatory pattern in the frequency domain.
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Details
Item Type: |
University of Pittsburgh ETD
|
Status: |
Unpublished |
Creators/Authors: |
Creators | Email | Pitt Username | ORCID  |
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Romanov, Vyacheslav N. | vnrst1@pitt.edu | VNRST1 | |
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ETD Committee: |
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Date: |
10 October 2005 |
Date Type: |
Completion |
Defense Date: |
18 July 2005 |
Approval Date: |
10 October 2005 |
Submission Date: |
26 July 2005 |
Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
Institution: |
University of Pittsburgh |
Schools and Programs: |
Dietrich School of Arts and Sciences > Chemistry |
Degree: |
PhD - Doctor of Philosophy |
Thesis Type: |
Doctoral Dissertation |
Refereed: |
Yes |
Uncontrolled Keywords: |
AFM; ANSIM; apertureless nearfield scanning infrared; atomic force microscopy; CO; CO2; coupled dipoles model; crystallization; diffraction limit; effective medium; Fresnel reflection; image dipole; laser; light scattering; Lorentzian; Mie; nano scale; NEC2; numerical electromagnetic code; quasi-static; Raman; SEM; silver bleed through; spatial resolution; TEM |
Other ID: |
http://etd.library.pitt.edu/ETD/available/etd-07262005-161322/, etd-07262005-161322 |
Date Deposited: |
10 Nov 2011 19:53 |
Last Modified: |
15 Nov 2016 13:46 |
URI: |
http://d-scholarship.pitt.edu/id/eprint/8611 |
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