The application of thin film planar waveguides as a refractive index detector for microscale high performance liquid chromatography

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dc.contributor.authorKang, Leeen
dc.contributor.committeechairDessy, Raymond E.en
dc.contributor.committeememberMason, John G.en
dc.contributor.committeememberViers, Jimmy W.en
dc.contributor.committeememberAnderson, Mark R.en
dc.contributor.committeememberMerola, Joseph S.en
dc.contributor.departmentChemistryen
dc.date.accessioned2014-03-14T21:20:59Zen
dc.date.adate2005-10-13en
dc.date.available2014-03-14T21:20:59Zen
dc.date.issued1991-01-15en
dc.date.rdate2005-10-13en
dc.date.sdate2005-10-13en
dc.description.abstractThin film planar waveguides were originally introduced in microwave engineering. The spectroscopist began to use such waveguides as tools to solve chemical characterization problems since Harrick and Fahrenfort introduced the Attenuated Total'Reflection (ATR) in the early 1960's. Today, planar waveguides are playing an important and ever-increasing role in modem chemistry. In this thesis, a novel design for a refractometer involving the application of a thin film planar waveguide and coupling prism was demonstrated. This device shows the feasibility of refractive index measurements in a flowing stream. Therefore, an online detector for High Performance Liquid Chromatography (HPLC) was chosen as the vehicle to test out the concepts. The research works were devoted to studies of waveguide properties and flow dynamics in a chromatographic situation. It was found that microscale detection is possible. The sensitivity can be enhanced by using the highest propagation mode as the probe, and by selecting a proper refractive index liquid as the solvent carrier. A description of the investigation and the various factors involved in designing and optimizing a planar waveguide for refractive index detection is included. The results provide guidelines for the device as a realistic analytical detector.en
dc.description.degreePh. D.en
dc.format.extentix, 144 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-10132005-152520en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10132005-152520/en
dc.identifier.urihttp://hdl.handle.net/10919/39813en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1991.K364.pdfen
dc.relation.isformatofOCLC# 23713792en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1991.K364en
dc.subject.lcshFiber opticsen
dc.subject.lcshLiquid chromatographyen
dc.titleThe application of thin film planar waveguides as a refractive index detector for microscale high performance liquid chromatographyen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineChemistryen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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