Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 147, Issue 1, Pages 310-315Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2010.03.032
Keywords
Full-field; Oxygen sensor; Phase fluorometry; Pt(II) complex; Sol-gel
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A modulation system for the phase-resolved two-dimensional fluorescence phase imaging of a planar optical oxygen sensor is presented. The proposed system is based on the phase fluorometry technique and uses the four-frame integrating-bucket method. Integrating buckets with multiple frames are achieved using a complex programmable logic device to provide an external trigger to the charge coupled device (CCD). The oxygen-sensitive film is based on microporous film prepared using a sol-gel process with a NW complex, platinum tetrakis pentafluorophenyl porphine (PtTFPP); the film can be efficiently excited by a laser diode with a central wavelength of 405 nm. The experiment results show that the maximum phase difference between 0% and 100% gaseous oxygen is 22 degrees. The 2D full-filed O-2 distribution imaging was found to be the most sensitive between 0% and 20% O-2. The combination of optical sensor technology and phase-resolved imaging allows the determination of the distribution of chemical or physical parameters in heterogeneous systems, making the proposed system a powerful testing tool for screening and mapping applications. (c) 2010 Elsevier B.V. All rights reserved.
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