New ZnO nanostructures as non-enzymatic glucose biosensors
| Autor: | Behzad Lotfi, Maryam Mirza-Aghayan, Aliakbar Tarlani, Sommayeh Golsanamlou, Avideh Khazraei, Mahtab Fallah, Jacques Muzart |
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| Rok vydání: | 2015 |
| Předmět: |
Inorganic chemistry
Oxalic acid Biomedical Engineering Biophysics chemistry.chemical_element Biosensing Techniques Zinc Arginine Glucose Oxidase chemistry.chemical_compound Nafion Electrochemistry Humans Glucose oxidase Cysteine Bifunctional chemistry.chemical_classification biology Nanotubes Carbon Electrochemical Techniques General Medicine Enzymes Immobilized Nanostructures Amino acid Glucose chemistry Urea biology.protein Zinc Oxide Biosensor Biotechnology |
| Zdroj: | Biosensors and Bioelectronics. 67:601-607 |
| ISSN: | 0956-5663 |
| DOI: | 10.1016/j.bios.2014.09.063 |
| Popis: | In a new approach, shape controlled synthesis of zinc oxide nanostructures were carried out using a solvothermal route assisted amino acids such as l -Lysine (lysine), l -Cysteine (cysteine) and l -Arginine (arginine) as bifunctional species with (or without) urea or oxalic acid as additives which affect the pH of the reaction. Rod, powder, particle, cube, rock candy-like, sheet, sphere, brain-like, groundnut-like and pussy willow-like morphologies were obtained through the synthetic route. Particle sizes varied from 25 nm to 4 μm. To test the application, nine ZnO nanostructures, formulated by multi-walled carbon nanotube (MWCNT) on glassy carbon electrode (GCE) were applied as new nanobiosensors for detecting glucose in a simple and inexpensive way without using any glucose oxidase or nafion. Glucose sensing accomplished in a phosphate buffer solution (PBS, pH=7) for ZnO/MWCNT/GCE samples. Results showed that in this non-enzymatic biosensor system, spherical ZnO obtained from zinc acetate/cycteine/oxalic acid synthetic route has the highest sensitivity of 64.29 μA/cm 2 mM with repeatable results. For the mentioned sensor, no interference observed in the presence of dopamine, uric acid and fructose. |
| Databáze: | OpenAIRE |
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