title: Fiber-optic nitric oxide-selective biosensors and nanosensors.
abstract: Fiber-optic biosensors that are selective for nitric oxide and do not respond to most potential interferents have been prepared with cytochromes c'. Both micro- and nanosensors have been prepared, and their response is fast (< 1 s), reversible, and linear up to 1 mM nitric oxide. The detection limit is 20 microM, making the sensor useful for some biological samples, such as the macrophages studied here. While sensors have been prepared based on the fluorescence of the cytochromes c', optodes with greatly enhanced signal-to-noise ratios have been made by labeling the cytochrome c' with a fluorescent dye. Comparisons of cytochromes c' from three species of bacteria as well as of two matrixes were performed and the optimum sensor configuration is described.
authors.affiliation: Department of Chemistry, University of Michigan, Ann Arbor 48109-1055, USA.
authors.forename: S L
authors.initials: SL
authors.lastname: Barker
authors.forename: R
authors.initials: R
authors.lastname: Kopelman
authors.forename: T E
authors.initials: TE
authors.lastname: Meyer
authors.forename: M A
authors.initials: MA
authors.lastname: Cusanovich
mesh_terms: D000180:Acrylic Resins; D000818:Animals; D015374:Biosensing Techniques; D001854:Bone Marrow Cells / Q000378:metabolism; D002478:Cells, Cultured; D003574:Cytochrome c Group; D005336:Fiber Optic Technology; D005456:Fluorescent Dyes; D017979:Gold Colloid; D008264:Macrophages / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C; D009569:Nitric Oxide / Q000032:analysis*; D055100:Optical Fibers; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D003574:Cytochrome c Group; D005456:Fluorescent Dyes; D017979:Gold Colloid; D009569:Nitric Oxide; D000099166:Polyacrylamides