Oxidation of a platinum microwire surface applied in glucose detection
| Autor: | Duy Hien Tong, Binh Van Pham, Mau Chien Dang, Phu Duy Tran, Thanh Tung Pham Xuan, Thi Thanh Tuyen Le |
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| Přispěvatelé: | Xuan, Thanh Tung Pham, Le, Thi Thanh Tuyen, Tran, Phu Duy, Pham, Binh Van, Tong, Duy Hien, Dang, Mau Chien |
| Rok vydání: | 2010 |
| Předmět: |
glucose biosensor
Materials science Aqueous solution biology Glucose detection Inorganic chemistry chemistry.chemical_element Sulfuric acid Pt surface oxidation Silane Industrial and Manufacturing Engineering chemistry.chemical_compound chemistry biology.protein General Materials Science Glucose oxidase Surface oxidation sulfuric acid solution Electrical and Electronic Engineering Cyclic voltammetry Platinum |
| Zdroj: | Advances in Natural Sciences: Nanoscience and Nanotechnology. 1:025013 |
| ISSN: | 2043-6262 |
| DOI: | 10.1088/2043-6254/1/2/025013 |
| Popis: | In this paper, we report the results of the surface oxidation of platinum (Pt) microwires in aqueous sulfuric acid (H 2 SO 4) solutions by using a cyclic voltammetry technique. The Pt microwire chips were scanned and applied with voltage potentials ranging from 0 to 1.4 V in the H 2 SO 4 solution with concentrations from 0.0003 to 0.0018 M to find out the optimized concentration of sulfuric acid for the oxidation process. The cyclic voltammetry (CV) measurements show the oxidation peak at a potential range from 1.1 to 1.2 V. This is the peak of the interfacial place exchange of chemisorbed O (O chem ) and surface Pt atoms, resulting in the formation of a quasi-3D surface PtO lattice comprising Pt 2+ and O 2−. The oxidized surface Pt microwires were then functionalized with a 3-aminopropyl triethoxy silane (APTES) and glucose oxidase (GOD) was immobilized onto the functionalized chips for further application in glucose detection. By using this process, Pt microwires have been used for the successful detection of glucose in solution with concentrations in the range of 4–20 mM. |
| Databáze: | OpenAIRE |
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