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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Bao, Jianchun Han, Min Li, Yanfen Bai, Hongyan Liu, Qian Dai, Zhihui |
| Description | Country affiliation: China Author Affiliation: Li Y ( Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing, 210097, China.) |
| Abstract | Porous tubular silver (Ag) nanoparticles were successfully synthesized by electrodeposition of Ag into cadmium sulfide (CdS) modified porous anodic alumina (PAA) template and removal of CdS subsequently. Only the solid nanorods were obtained without CdS. The strong affinity between S2- and Ag (I) caused preferential deposition of Ag on the pore walls to form tubular Ag. After removal of CdS, porous tubular Ag nanoparticles were obtained. This novel nanostructure was characterized by XRD, TEM, FESEM, EDS and nitrogen adsorption-desorption isotherms. Using porous tubular Ag nanoparticles modified glassy carbon electrode (GCE) as a working electrode, a good nonenzymatic cholesterol sensor was constructed, which showed markedly improved electrocatalytic activity toward cholesterol oxidation compared to that of solid Ag nanorods. Under optimal detection conditions, the constructed sensor had a linear response range of 2.8 x 10(-4) M to 3.3 x 10(-2) M and the detection limit was 1.8 x 10(-4) M at a signal-to-noise ratio of 3. The biosensor showed an acceptable reproducibility, good stability and low interferences. To the best of our knowledge, it is the first example of a nonenzymatic cholesterol biosensor based on Ag nanoparticles. The experimental results demonstrated that porous tubular Ag nanoparticles provided a promising platform for rational design and fabrication of nonenzymatic cholesterol sensors. |
| ISSN | 09565663 |
| Issue Number | 10 |
| Volume Number | 25 |
| e-ISSN | 18734235 |
| Journal | Biosensors and Bioelectronics |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-06-15 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Biosensing Techniques Instrumentation Cholesterol Analysis Conductometry Microelectrodes Nanoparticles Chemistry Ultrastructure Silver Enzymes Equipment Design Equipment Failure Analysis Particle Size Porosity Reproducibility Of Results Sensitivity And Specificity 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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