Loading...
Please wait, while we are loading the content...
Similar Documents
on-enzymatic hydrogen peroxide detection using gold nanoclusters-modified hosphorus incorporated tetrahedral amorphous carbon electrodes
| Content Provider | Semantic Scholar |
|---|---|
| Author | Liua, Iping Donga, Wenjun Liuc, Erjia Tanga, Weihua Zhub, Jiaqi Hanb, Jiecai |
| Copyright Year | 2009 |
| Abstract | Sensitive electrochemical electrodes for hydrogen peroxide (H2O2) detection were developed using gold nanoclusters (NCs) to modify phosphorus incorporated tetrahedral amorphous carbon films (ta-C:P/Au). Au oxide covered Au NCs were electrodeposited on ta-C:P surfaces, and the size of Au/AuOx NCs ranged between 50 nm and 91 nm, depending on the deposition time. The ta-C:P/Au electrodes exhibited higher electrocatalytic activity towards H2O2 oxidation compared to ta-C:P electrodes. This is due to the threedimensional island structure of Au/AuOx NCs, which accelerates electron exchange between ta-C:P and H O in phosphate buffered solution. We also found that ta-C:P/Au electrodes with Au/AuO NCs of a old nanocluster hosphorus incorporation etrahedral amorphous carbon ydrogen peroxide detection lectrocatalytic activity 2 2 x smaller size and moderate coverage exhibited larger current response to H2O2 oxidation. The results obtained from amperometric response curves indicated that the use of Au/AuOx NCs as microelectrodes directly favored H2O2 oxidation through hemispherical diffusion. The linear detection range of H2O2 at the non-enzymatic ta-C:P/Au electrodes was identified to be between 0.2 M and 1 mM with a detection limit of 80 nM under optimized conditions. These ta-C:P/Au electrodes have potential applications in high H2O2 sensing due to their |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www3.ntu.edu.sg/home/mejliu/index_files/Liu%20AP_EA_2010.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Buffers Diamond-like carbon Eighty Electron Gold Hydrogen Peroxide 30 MG/ML Topical Solution Large Link's Awakening Peroxides Phosphorus Physical vapor deposition Small TA Luft Triamcinolone Acetonide 1 MG/ML Topical Cream [Pediaderm TA] electrode inorganic phosphate oxidation |
| Content Type | Text |
| Resource Type | Article |
