¡@Silver nanowires prepared by the the reduction of AgNO3 at low temperature with thermocatalystic biphase (anatase and brookite phases) TiO2 nanoparticles are described. Furthermore, the possible mechanism to grow silver nanowires without the help of the Ag seed and capping reagent is proposed.
¡@Firstly, the amorphous TiO2 nanoparticles prepared by sol-gel method were spin-coated on the silicon wafer to form amorphous TiO2 matrix. Then an aqueous AgNO3 (1 µL 0.7 M) solution was dropped on the amorphous TiO2 matrix. Following the heat treatment at 200 ¢XC for 8 h, the silver nanowires (length~10 µm, line width~100 nm) were grown on the silicon wafer. We found that amorphous phase of TiO2 was changed to the anatase and brookite phases during the thermal reduction of the aqueous solution of AgNO3.
¡@Silver nanowires were characterized as f.c.c. structure by XRD. The TiO2 particles play an important role in providing electrons and holes for redox reaction and nucleation. With the controlling of the heating temperature and the amount of AgNO3, the silver nanowires were selectively grown in one dimension with large energetic surface. A combination of HR-TEM imaging and selected area electron diffraction reveals that the growing direction for the Ag wires is <011>.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0623108-164201 |
| Date | 23 June 2008 |
| Creators | Wang, Ching-Wen |
| Contributors | Lan-Chang Liang, Chin-Hsing Chou, Teng-Yuan Dong, Nein-Chen Chang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623108-164201 |
| Rights | withheld, Copyright information available at source archive |
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