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dc.contributor.authorKang, Leeen_US
dc.date.accessioned2014-03-14T21:20:59Z
dc.date.available2014-03-14T21:20:59Z
dc.date.issued1991-01-15en_US
dc.identifier.otheretd-10132005-152520en_US
dc.identifier.urihttp://hdl.handle.net/10919/39813
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_US
dc.format.mediumBTDen_US
dc.publisherVirginia Techen_US
dc.relation.haspartLD5655.V856_1991.K364.pdfen_US
dc.subjectLiquid chromatographen_US
dc.subjectyFiber opticsen_US
dc.subject.lccLD5655.V856 1991.K364en_US
dc.titleThe application of thin film planar waveguides as a refractive index detector for microscale high performance liquid chromatographyen_US
dc.typeDissertationen_US
dc.contributor.departmentChemistryen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineChemistryen_US
dc.contributor.committeechairDessy, Raymond E.en_US
dc.contributor.committeememberMason, John G.en_US
dc.contributor.committeememberViers, Jimmy W.en_US
dc.contributor.committeememberAnderson, Mark R.en_US
dc.contributor.committeememberMerola, Joseph S.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10132005-152520/en_US
dc.date.sdate2005-10-13en_US
dc.date.rdate2005-10-13
dc.date.adate2005-10-13en_US


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