Electrochemical determination of corrosion protection ability of fullerene thin films treated by radiofrequency plasma

Sittner, Falk; Enders, B.; Ensinger, Wolfgang

doi:10.1016/j.tsf.2003.12.096

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…Using a syringe, 0.2 mL of the membrane solution was sprayed to the center of the plate. After a spinning time of 4 s, a membrane of 5 m thickness, which was determined by the surface profiler [20], was then coated on the quartz plate. The membrane was stored in buffer solution when not used.…”

Section: Preparation Of Sensing Membranementioning

confidence: 99%

A selective optical chemical sensor for 2,6-dinitrophenol based on fluorescence quenching of a novel functional polymer

Wang

Zeng

Zhao

et al. 2006

Talanta

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A bifurcated optical fiber based chemical sensor for continuous monitoring of 2,6-dinitrophenol (2,6-DNP) has been proposed based on the reversible chemical reaction between a novel functional poly(vinyl chloride) (PVC) as the sensing material and the analytes. The functional PVC (FPVC), containing a fluorescent curcumin moiety, was synthesized by the nucleophilic substitution of a fraction of the chlorine atoms bound to the PVC backbone by curcumin. When plasticized in a membrane of 5 m thickness, FPVC extracts 2,6-DNP from aqueous solution into the bulk membrane phase and reacts with the analyte to form a complex with low fluorescence efficiency through hydrogen bonding. Formation of the complex gave a significant fluorescence quenching which is suitable for signalling the occurrence of the host-guest interaction. At pH 3.50, the sensor exhibits a dynamic detection range from 2.5 × 10 −6 to 7.0 × 10 −3 mol L −1 with a limit of detection of 1.0 × 10 −6 mol L −1 . As 2,6-DNP can provide an optimal space geometry matches to the formation of hydrogen bonds, the sensor shows excellent selectivity for 2,6-DNP over other nitrophenols. The forward and reverse response time (t 95 ) of the sensor both was within 1 min. The repeatability, reproducibility, and lifetime of the sensor were also satisfied. The sensor was applied to determine 2,6-DNP in water samples successfully.

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Section: Preparation Of Sensing Membranementioning

confidence: 99%