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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | García, Miguel Escarpa, Alberto |
| Description | Country affiliation: Spain Author Affiliation: García M ( Department of Analytical Chemistry and Chemical Engineering, University of Alcalá, E-28871 Alcalá de Henares, Madrid, Spain.) |
| Abstract | Nanowires (NWs) are critically important building blocks of nanotechnology for sensing, biosensing and bioelectronics. However, in order to avoid complex and stiff configurations reported, a simpler and disposable approach is needed. Nickel nanowires (NiNWs) are one of the most promising alternatives because they allow magnetic manipulations through the application of an external magnetic field and they remain to be exploited in analytical field for electrochemical biosensing in real samples. In this work, NiNWs were characterized by scanning electronic microscopy (SEM), transmission electronic microscopy (TEM), energy-dispersive X-ray spectrometry (EDS) and X-ray photoelectronic spectroscopy (XPS) and then easily used in the construction of disposable detectors on carbon-screen printed electrodes (CSPEs). Fabricated NiNWs using alumina templates were about 330 nm of diameter and 6 µm lengths. XPS revealed that NiNWs based electrodes contained just a 0.9% of Ni with an enhancement of current density of about 65 times in comparison with Ni-bulk electrode under flow conditions. Electrochemically activated NiNWs (at -1.5 V, 600 s under magnetic field of 2×4200 G) gave the best signal-to-noise performance exhibiting fast response time to representative carbohydrate, very good mechanical stability, no memory effect and an extreme resistance to fouling under hydrodynamics conditions allowing an excellent analytical performance on the board of just one disposable single-electrode (RSDs≤7%, n=50). Analytical performance of NiNWs was also excellent in the analysis of selected samples exhibiting very good reliability, precision (RSDs≤2%) and recovery rates (95-115%). NiNWs are becoming a simple and easy-to-use nanotool for fast, reliable and decentralized sensing of carbohydrates; and as a consequence, 'disposable nanoanalytics' is approaching. |
| ISSN | 09565663 |
| Issue Number | 5 |
| Volume Number | 26 |
| e-ISSN | 18734235 |
| Journal | Biosensors and Bioelectronics |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-01-15 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Biosensing Techniques Instrumentation Carbohydrates Analysis Conductometry Disposable Equipment Nanotechnology Nanotubes Chemistry Nickel Equipment Design Equipment Failure Analysis Journal Article Research Support, Non-u.s. Gov't Discipline Biotechnology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nanoscience and Nanotechnology Medicine Biophysics Biomedical Engineering Biotechnology Electrochemistry |
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