Regulation of Silver Shell Growths on Gold Nanorods and Nanodumbbells
| Autor: | Jyun-Hao Lin, 林俊澔 |
|---|---|
| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 Au–Ag core–shell (Au@Ag) nanobars could be synthesized from gold nanorod (NR) or nanodumbbell (ND). Hexadecyl trimethylammonium Bromide (CTAB) and SDS were employed as the capping molecules. The effects of reaction temperature and chemical modification are studied. Au@Ag NPs with quasi-ellipsoidal shape can be obtained in CTAB at room temperature, but those have irregular shape in SDS. On the other hand, triangular bipyramid (TBP) NPs were found for CATB and SDS at 75 ℃. Further, silver deposition can take place at first on the pre-formed silver layers on the lateral sides at room temperature. In addition to, additive cysteine was used as an additive to modify on both the ends of the NRs. The experimental results show that the shape of NPs was changed from rectangle to TBP. Our results show that the long ends of gold NDs are in the position of the bar center and closely paralleled the shorter edge of TBP.According to the research, gold nanorod or nanodumbbell can be synthesized diversity shape with different modified. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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