Screen-printable surfactant-induced sol–gel graphite composites for electrochemical sensors
| Autor: | Ana R. Guadalupe, Yizhu Guo |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Aqueous solution
Materials science biology Metals and Alloys Condensed Matter Physics Electrochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Ferrocene chemistry Pulmonary surfactant Electrode Materials Chemistry biology.protein Glucose oxidase Graphite Electrical and Electronic Engineering Composite material Instrumentation Biosensor |
| Zdroj: | Sensors and Actuators B: Chemical. 46:213-219 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/s0925-4005(98)00115-4 |
| Popis: | A novel procedure to prepare sol–gel graphite composite electrodes is presented. This procedure uses the surfactant bis(2-ethylhexyl) sulfosuccinate (AOT) and eliminates the need for a cosolvent, an acidic catalyst, a cellulose binder and thermal curing. Cobalt phthalocyanine (CoPC), diphenylthiocarbazone (DPT) and glucose oxidase (GOx)/ferrocene (Fc) were encapsulated during the surface preparation to study the utility of these composites as catalytic surfaces and biochemical sensors. The glucose sensor has a useful working range up to 30 mM with a 10 s response time. The DPT-modified electrode has been applied for lead determination based on a complexing/voltammetric strategy. The CoPC modified surface was catalytically active for reduced glutathione (GSH) reducing the onset potential for its oxidation by 400 mV. Fabrication of screen-printed electrodes by this method proved to be a simple approach for electroanalytical applications in aqueous and nonaqueous solvents. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect