Number of the records: 1
Tapered Optical Fiber Sensor for Detection of pH in Microscopic Volumes
- 1.
SYSNO ASEP 0443684 Document Type J - Journal Article R&D Document Type The record was not marked in the RIV Subsidiary J Ostatní články Title Tapered Optical Fiber Sensor for Detection of pH in Microscopic Volumes Author(s) Podrazký, Ondřej (URE-Y) RID
Matějec, Vlastimil (URE-Y)
Mrázek, Jan (URE-Y) RID, ORCID
Martan, Tomáš (URE-Y)
Aubrecht, Jan (URE-Y) RID
Kašík, Ivan (URE-Y) RIDNumber of authors 6 Source Title Sensors and Transducers - ISSN 2306-8515
Roč. 27, May (2014), s. 312-328Number of pages 7 s. Publication form Print - P Language eng - English Country FR - France Keywords Optical sensors ; Fluorescence ; Microfiber tip Subject RIV JA - Electronics ; Optoelectronics, Electrical Engineering Institutional support URE-Y - RVO:67985882 Annotation A compact and robust tapered optical fiber microsensor is presented for detection of pH in a range from 5.8 to 7.5 in sub-microliter volumes. The sensor is based on a pH transducer 8- hydroxypyrene-1,3,6-trisulfonic acid trisodium salt immobilized in a xerogel matrix onto the tip of a optical fiber taper with a tip diameter below 20 mm. The sol-gel method and two silicon alkoxides is used for preparing the matrix. A ratio of the fluorescence emission intensities measured at 518 nm after the excitation at 400 and 450 nm is used for evaluating the sensor response to pH. This ratiometric approach enables to reduce effects of ambient light, bleaching of the sensitive layer and geometry of the probe to the fluorescence signal and achieve the resolution of about 0.07 pH units Workplace Institute of Radio Engineering and Electronics Contact Petr Vacek, vacek@ufe.cz, Tel.: 266 773 413, 266 773 438, 266 773 488 Year of Publishing 2016
Number of the records: 1