Chemistry Letters · 1996 · 80 citations · 5 references
Natural SciencesBiomedical EngineeringBiophysicsBiomedical OpticsBiophotonicsMicrofabricationFluorescence ImagingFluorescence MicroscopyFluorescence SpectroscopyMicrofluidicsOptical BiosensingPh AnalysisFluorescence BiosensingLocal Ph At InterfacesPh MeasurementPh SensingPh SensitivityPh-sensitive ProbesWater Interface Chemistry
Abstract A novel pH microprobe has been developed, which makes it possible to measure inhomogeneous pH distributions with submicrometer three-dimensional resolution. A polyacrylamide particle incorporated with pH-sensitive fluorescein-acrylamide is manipulated with a laser trapping technique. It is demonstrated that the local pH in a water/glass interface is different from that of bulk water.
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Submicrometer Intracellular Chemical Optical Fiber Sensors
Weihong Tan, Zhong-You Shi, Steve Smith et al. · Science · 1992 · 273 citations