Optimisation of sol-gel-derived silica films for optical oxygen sensing

McEvoy, Aisling K.; McDonagh, Colette; MacCraith, Brian D.

doi:10.1007/bf02436994

Cited by 20 publications

(16 citation statements)

References 5 publications

(8 reference statements)

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“…The response time ( t 95 ) to change from air-saturated buffer to deoxygenated B-R buffer and back was less than 10 seconds in both cases. Although faster-responding sensors have been reported [41, 42], this sensor's response time was faster than some other sol-gel materials [43, 44], making it a viable option for monitoring oxygen response in biological applications. The sensor film also had a good reversibility, which was tested for 6 cycles between deoxygenated solutions and oxygenated solutions.…”

Section: Resultsmentioning

confidence: 99%

Dually fluorescent sensing of pH and dissolved oxygen using a membrane made from polymerizable sensing monomers

Tian

Shumway

Youngbull

et al. 2010

Sensors and Actuators B: Chemical

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Using a thermal polymerization approach and polymerizable pH and oxygen sensing monomers with green and red emission spectra, respectively, new pH, oxygen, and their dual sensing membranes were prepared using poly(2-hydroxyethyl methacrylate)-co-poly(acrylamide) as a matrix. The sensors were grafted on acrylate-modified quartz glass and characterized under different pH values, oxygen concentrations, ion strengths, temperatures and cell culture media. The pH and oxygen sensors were excited using the same excitation wavelength and exhibited well-separated emission spectra. The pH-sensing films showed good response over the pH range 5.5 to 8.5, corresponding to pKa values in the biologically-relevant range between 6.9 and 7.1. The oxygen-sensing films exhibited linear Stern-Volmer quenching responses to dissolved oxygen. As the sensing membranes were prepared using thermally initiated polymerization of sensing moiety-containing monomers, no leaching of the sensors from the membranes to buffers or medium was observed. This advantageous characteristic accounts in part for the sensors' biocompatibility without apparent toxicity to HeLa cells after 40 hours incubation. The dual-sensing membrane was used to measure pH and dissolved oxygen simultaneously. The measured results correlated with the set-point values.

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Section: Resultsmentioning

confidence: 99%

Dually fluorescent sensing of pH and dissolved oxygen using a membrane made from polymerizable sensing monomers

Tian

Shumway

Youngbull

et al. 2010

Sensors and Actuators B: Chemical

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“…Examples are sol–gel [147, 152, 154, 249], ethyl cellulose or PVC membranes [61], different types of ORMOSILs [39, 94, 106], polystyrene [91], polysulfones [11, 18], poly(dimethylsiloxane) alone [251] or with different amounts of pendant acrylate groups [168], and a blended fluoropolymer matrix consisting of Nafion ® and Aflas ® [83]. In another approach, the [Ru(dpp) 3 ] 2+ complex was adsorbed onto silica and then dispersed in a silicone rubber support [38, 93].…”

Section: Luminescence-based Indicatorsmentioning

confidence: 99%

Indicators for optical oxygen sensors

2012

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Continuous monitoring of oxygen concentration is of great importance in many different areas of research which range from medical applications to food packaging. In the last three decades, significant progress has been made in the field of optical sensing technology and this review will highlight the one inherent to the development of oxygen indicators. The first section outlines the bioanalytical fields in which optical oxygen sensors have been applied. The second section gives the reader a comprehensive summary of the existing oxygen indicators with a critical highlight on their photophysical and sensing properties. Altogether, this review is meant to give the potential user a guide to select the most suitable oxygen indicator for the particular application of interest.

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“…Examples are sol-gel [147,152,154,249], ethyl cellulose or PVC membranes [61], different types of ORMOSILs [39,94,106], polystyrene [91], polysulfones [11,18], poly (dimethylsiloxane) alone [251] or with different amounts of pendant acrylate groups [168], and a blended fluoropolymer matrix consisting of Nafion ® and Aflas ® [83]. In another approach, the [Ru(dpp) 3 ] 2+ complex was adsorbed onto silica and then dispersed in a silicone rubber support [38,93].…”

Section: Transition Metal Polypyridyl Complexesmentioning

confidence: 99%