Bimetallic Pt/Ru complexes as catalysts for the electrooxidation of methanol.
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Journal Article↗
Biomedical subjects
M E Tess
Publications and source records attributed to M E Tess.
Chemical and biochemical sensors based on advances in materials chemistry.
The advance of materials chemistry has influenced the design of analytical sensors, especially those using spectroscopic or electrochemical methods for generating the signal. New methods of immobilizing enzymes, chromophores, and electron-transfer catalysts have resulted from initiatives in materials science. Systems based on sol-gel chemistry are especially noteworthy in this regard, but other important materials for chemical and biochemical sensors include zeolites, organic polymers, and various conducting composites. Applications cited include determinations of inorganic ions, gases, neurotransmitters, alcohols, carbohydrates, amino acids, proteins, and DNA.
Animals↗
Humidity-independent solid-state amperometric sensor for carbon monoxide based on an electrolyte prepared by sol-gel chemistry.
An amperometric sensor consisting of a film of silica gel over an interdigitated microsensor electrode provided a humidity-independent response to CO over the range of 9%-76% humidity. The residual solvent contents were in the 20%-50% range, depending on the age of the gels and the humidity. Variations in this range did not change the sensitivity. Gaseous CO was quantified in the absence of a contacting liquid phase using either linear scan voltammetry (LSV) or flow injection amperometry (FIamp) at constant applied potential. With LSV after a 2-min exposure to the sample, sensors with gels aged for 28-40 days yielded sensitivities of 0.38, 0.41, and 0.38 nA/ppmv for measurements at 9%, 33%, and 76% humidity, respectively; the corresponding correlation coefficients were 0.992, 0.995, and 0.999. The detection limit with FIamp was 5 ppmv.
Carbon Monoxide↗