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Romanov, Vyacheslav N. (2005) UNIFIED MICROSCOPY AND SPECTROSCOPY FOR NANOSCALE CHEMICAL IMAGING. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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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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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Romanov, Vyacheslav N.vnrst1@pitt.eduVNRST1
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairWalker, Gilbert
Committee MemberWaldeck, David Hdave@pitt.eduDAVE
Committee MemberBlachere, Jean
Committee MemberAmemiya, Shigeruamemiya@pitt.eduAMEMIYA
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:, etd-07262005-161322
Date Deposited: 10 Nov 2011 19:53
Last Modified: 15 Nov 2016 13:46


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