Evaluation of electrode surface modification techniques for the development of chemical sensors
This thesis covers several aspects of electrode surface modification techniques. The successful application of gamma-radiation to create polymer-coated electrodes, where the polymers can be ion exchangers and consequently of great analytical interest by themselves (such as the polymer poly(diallyl) dimethyl ammonium chloride) or where some other neutral polymers can function as convenient matrices for the introduction of biomolecules and/or other electrochemically interesting species is reported. This is demonstrated by using the neutral polymer poly(vinyl alcohol) (PVAL) as a matrix for immobilization of the enzyme glucose oxidase and the mediator methyl viologen. The effect of {gamma}-radiation on PVAL is discussed, as well as swelling properties of the irradiated polymers and specific characteristics of the created chemical sensors. Results of an experiment where the various kinds of interactions between the ion-exchange polymer Nafion and some positively charged species are explored are reported, and a model system for competition (methyl viologen vs. ruthenium hexaamine) which increases significantly our understanding of the interaction is mentioned. The effect of {gamma}-radiation on Nafion and its ion-exchange compabilities is discussed also. A system of conduction polymers primarily polypyrrole, used as a detector of electroinactive anions due to their doping-undergoing in the film is discussed. Preliminary results on a new method that involves chemical cross-linking of a triisocyane molecule with -OH containing polymers in the presence of enzymes are reported.
- Research Organization:
- Cincinnati Univ., OH (USA)
- OSTI ID:
- 6879599
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electrode films of porous agarose: The effects of physical structure on electron transport processes. [Impregnated with Nafion; immobilized electroactive species]
Electrode-immobilized compounds through. gamma. radiation
Related Subjects
400600* -- Radiation Chemistry
AMMINES
AZINES
BIPYRIDINES
CHEMICAL PREPARATION
CHEMICAL RADIATION EFFECTS
CHEMISTRY
COATINGS
COMPLEXES
ELECTRODES
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
HETEROCYCLIC COMPOUNDS
ION EXCHANGE MATERIALS
IONIZING RADIATIONS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
POLYMERS
PYRIDINES
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RUTHENIUM COMPLEXES
SYNTHESIS
TRANSITION ELEMENT COMPLEXES