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Emission-Excitation Fruorescent Optoelectronic Sensors

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dc.contributor.advisor Stanaćević, Milutin en_US
dc.contributor.author Borodin, Anatoliy en_US
dc.contributor.other Department of Electrical Engineering. en_US
dc.date.accessioned 2017-09-20T16:52:43Z
dc.date.available 2017-09-20T16:52:43Z
dc.date.issued 2015-05-01 en_US
dc.identifier.uri http://hdl.handle.net/11401/77452 en_US
dc.description 122 pg. en_US
dc.description.abstract Notwithstanding the existing superior qualities of fluorescence sensors and sensor systems, the field of fluorescence sensing technology is open for active exploration and inspires researchers to develop, using more sophisticated detection methods, faster, more compact, less expensive designs that would appeal to a wider circle of customers. In this dissertation, I report on the development of two excitation-emission fluorescent optoelectronic sensors. First, I present a functional prototype of a low-cost portable non-fiber optic oxygen sensor, based on fluorescence quenching. The prototype design benefits from the robustness of a non-fiber optic design configuration and the simplicity of a double-sided optical configuration. I detected experimentally and studied analytically the advantages of a sandwich-structured sensor element over a sensor element consisting of a single oxygen-sensitive film. Based on the study, I concluded that the dynamic range provided by a sandwich-structured sensor element exceeds that of a single-film sensor element, on condition that the thickness of all sensing films in both sensor elements is equal. As for the sensitivity of a sandwich-structured sensor element, it exceeds that of a single-film sensing element if the sensing films of the former are thinner. To minimize the number of employed electronic components and avoid using sophisticated and expensive instruments, while designing our prototype, I employed an intensity-based measuring technique. I suggested a Stern-Volmer equation modification so that the user could avoid calibrating the designed prototype, to determine oxygen concentration at different temperatures. My analytical model led to the development of a novel optical design configuration for sensors, based on fluorescence quenching, and also demonstrated the configuration superiority in sensitivity over its analogs. My second design presented in this dissertation is a functional prototype of a novel fluorimeter, where a set of individually controlled laser diodes (LDs) is used as excitation light sources. The fluorimeter’s performance is evaluated by authenticating protected objects. To authenticate objects marked with fluorescent materials, I proposed a method, based on the analysis of excitation-emission matrices (EEMs) representing security markers, which helps avoid authentication errors, improves the speed of information processing due to the introduced digitized EEMs, basis EEMs, and basis markers. I also presented a conceptual design of a multidimensional fluorimeter, based on the designed prototype. Due to the capability of the new fluorimeter to control LDs individually, it can be used to scan not only excitation and emission wavelengths, but also the optical power density and modulation frequency of excitation light. The suggested conceptual design enables the acquisition of 3D spectra, which provide more detailed information about molecules in a single measurement, due to the employment of an excitation light modulation technique and a multi-channel photomultiplier tube. The multidimensional fluorimeter opens up new opportunities for investigating unique fluorescence properties of UC materials by analyzing multidimensional fluorescence spectra. en_US
dc.description.sponsorship This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree. en_US
dc.format Monograph en_US
dc.format.medium Electronic Resource en_US
dc.language.iso ru en_US
dc.publisher The Graduate School, Stony Brook University: Stony Brook, NY. en_US
dc.subject.lcsh Engineering en_US
dc.title Emission-Excitation Fruorescent Optoelectronic Sensors en_US
dc.type Dissertation en_US
dc.mimetype Application/PDF en_US
dc.contributor.committeemember Gouzman, Michael en_US
dc.contributor.committeemember Shterengas, Leon en_US
dc.contributor.committeemember Westerfeld, David en_US
dc.contributor.committeemember Tkachuk, Michael. en_US

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