Electrode-immobilized compounds through. gamma. radiation
Chemically Modified Electrodes (CMEs) are used as substrates in heterogeneous catalysis and as sensors. This work demonstrates a new strategy for immobilizing polyelectrolytes and electroactive agents on electrode surfaces. The success of this method lies in cross-linking water soluble polymer chains through the ionizing radiation of ..gamma.. emissions from a /sup 60/Co source. Cross-linking can create a continuous network out of the polymer macromolecules which then makes the network insoluble on the electrode surface. Bonds between the network and the substrate are also possible. Redox species mixed with the polymer network and irradiated become part of the insoluble network, and are permanently attached. The use of ..gamma.. radiation to make electrochemical sensors is demonstrated. The immobilized network poly(diallyl dimethyl ammonium chloride) (DDAC) is placed in a solution of potassium ferricyanide and ionicly exchanges the anion into the network. An electroactive network is created from irradiating a mixture of DDAC and 2,6-dichlorophenolindophenol (DCIP). Using the amount of electroactive DCIP remaining in the film as the optimization parameter, variables such as polymer:DCIP ratio, film thickness, and dosage employed are shown to be relevant.
- Research Organization:
- Cincinnati Univ., OH (USA)
- OSTI ID:
- 5616465
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400600* -- Radiation Chemistry
AMMONIUM CHLORIDES
AMMONIUM COMPOUNDS
AMMONIUM HALIDES
AROMATICS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
COBALT 60
COBALT ISOTOPES
DATA
DECOMPOSITION
DOSE RATES
ELECTRODES
ELECTROLYTES
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC IODINE COMPOUNDS
ORGANIC POLYMERS
PHENOLS
POLYMERIZATION
POLYMERS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIOISOTOPES
RADIOLYSIS
YEARS LIVING RADIOISOTOPES