{"id":{"repo_id":"montana","oai_identifier":"oai:scholarworks.umt.edu:etd-1204"},"canonical_url":"https://search.dev.ndltd.org/etd/montana/oai:scholarworks.umt.edu:etd-1204","repository":{"repo_id":"montana","name":"University of Montana","base_url":"https://scholarworks.umt.edu/do/oai/"},"display":{"title":"CHARACTERIZATION OF LONG PATHLENGTH CAPILLARY WAVEGUIDES FOR EVANESCENT FLUORESCENCE APPLICATIONS","abstract":"The optical properties of a novel fused silica fiber-optic capillary waveguide (FOCap) for fluorescence spectroscopy were evaluated. Evanescent fluorescence from samples in the FOCap was measured by coupling the FOCap to a light source and a fluorescence spectrophotometer. The FOCap has negligible excitation light loss over long lengths (20 m or more) for a range of wavelengths. The evanescent fluorescence was linear up to at least 20 m for a solution in the core and up to at least 15 m for a fluorophore covalently attached to the inner surface. Evanescent fluorescence measurements in 50, 150, and 250 µm inner diameter FOCaps indicate that greater sensitivity is achieved with thinner-walled capillaries which have more internal reflections. FOCaps can be fined tuned for a desired sensitivity by manipulating their physical dimensions. The ability of the FOCap to function as an indirect chemical sensor for nitroaromatic compounds is demonstrated with a pyrene-labeled waveguide.","abstract_html":"The optical properties of a novel fused silica fiber-optic capillary waveguide (FOCap) for fluorescence spectroscopy were evaluated. Evanescent fluorescence from samples in the FOCap was measured by coupling the FOCap to a light source and a fluorescence spectrophotometer. The FOCap has negligible excitation light loss over long lengths (20 m or more) for a range of wavelengths. The evanescent fluorescence was linear up to at least 20 m for a solution in the core and up to at least 15 m for a fluorophore covalently attached to the inner surface. Evanescent fluorescence measurements in 50, 150, and 250 µm inner diameter FOCaps indicate that greater sensitivity is achieved with thinner-walled capillaries which have more internal reflections. FOCaps can be fined tuned for a desired sensitivity by manipulating their physical dimensions. The ability of the FOCap to function as an indirect chemical sensor for nitroaromatic compounds is demonstrated with a pyrene-labeled waveguide.","abstract_has_math":false,"creators":["Paprocki, Eric"],"institution":"University of Montana","degree_name":"Master of Science (MS)","degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2007,"date_issued":"2007-01-01T08:00:00Z","date_published":"2007-01-01T08:00:00Z","updated_at":"2026-07-24T03:10:28Z","subjects":["capillary waveguide","fluorescence sensor","nitroaromatic"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://scholarworks.umt.edu/etd/185","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Paprocki, Eric"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["University of Montana"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["capillary waveguide","fluorescence sensor","nitroaromatic"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarworks.umt.edu/etd/185"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The optical properties of a novel fused silica fiber-optic capillary waveguide (FOCap) for fluorescence spectroscopy were evaluated. Evanescent fluorescence from samples in the FOCap was measured by coupling the FOCap to a light source and a fluorescence spectrophotometer. The FOCap has negligible excitation light loss over long lengths (20 m or more) for a range of wavelengths. The evanescent fluorescence was linear up to at least 20 m for a solution in the core and up to at least 15 m for a fluorophore covalently attached to the inner surface. Evanescent fluorescence measurements in 50, 150, and 250 µm inner diameter FOCaps indicate that greater sensitivity is achieved with thinner-walled capillaries which have more internal reflections. FOCaps can be fined tuned for a desired sensitivity by manipulating their physical dimensions. The ability of the FOCap to function as an indirect chemical sensor for nitroaromatic compounds is demonstrated with a pyrene-labeled waveguide."]},{"key":"dc:title","label":"Title","values":["CHARACTERIZATION OF LONG PATHLENGTH CAPILLARY WAVEGUIDES FOR EVANESCENT FLUORESCENCE APPLICATIONS"]}]}],"canonical_facts":{"dc:creator":["Paprocki, Eric"],"dc:description.abstract":["The optical properties of a novel fused silica fiber-optic capillary waveguide (FOCap) for fluorescence spectroscopy were evaluated. Evanescent fluorescence from samples in the FOCap was measured by coupling the FOCap to a light source and a fluorescence spectrophotometer. The FOCap has negligible excitation light loss over long lengths (20 m or more) for a range of wavelengths. The evanescent fluorescence was linear up to at least 20 m for a solution in the core and up to at least 15 m for a fluorophore covalently attached to the inner surface. Evanescent fluorescence measurements in 50, 150, and 250 µm inner diameter FOCaps indicate that greater sensitivity is achieved with thinner-walled capillaries which have more internal reflections. FOCaps can be fined tuned for a desired sensitivity by manipulating their physical dimensions. The ability of the FOCap to function as an indirect chemical sensor for nitroaromatic compounds is demonstrated with a pyrene-labeled waveguide."],"dc:identifier":["https://scholarworks.umt.edu/etd/185"],"dc:publisher":["University of Montana"],"dc:subject":["capillary waveguide","fluorescence sensor","nitroaromatic"],"dc:title":["CHARACTERIZATION OF LONG PATHLENGTH CAPILLARY WAVEGUIDES FOR EVANESCENT FLUORESCENCE APPLICATIONS"],"dc:type":["Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T03:10:28Z"}