Bhattacharya, Santanu and Biswas, Joydeep (2011) Role of spacer lengths of gemini surfactants in the synthesis of silver nanorods in micellar media. In: Nanoscale, 3 (7). pp. 2924-2930.
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In this work, we have prepared Ag-nanorods using biscationic gemini surfactant micelles as the media by a seed-mediated wet synthesis method. Towards this end, we first synthesized Ag-nanoseeds of diameter similar to 7 nm stabilized by trisodium citrate (as the capping agent). Then these Ag-nanoseeds were used to synthesize Ag-nanorods of different aspect ratios. With decreasing Ag-nanoseed concentration, the aspect ratios of the Ag-nanorods stabilized by these gemini surfactants increased gradually. Various Ag-nanoseeds and Ag-nanospecies were characterized using UV-Vis spectroscopy (to know the surface plasmon bands), transmission electron microscopy (to find out their particle sizes and distribution), energy-dispersive X-ray spectroscopy and X-ray diffraction. When we used micelles derived from gemini surfactants of shorter spacer-(CH(2))(n)-(n = 2 or 4) to stabilize the Ag-nanorods, the lambda(max) of the longitudinal band shifted more towards the blue region compared to that of the gemini surfactant micelles with a longer spacer-(CH(2))(n)-(n = 5, 12) at a given amount of the Ag-nanoseed solution. So, the growth of Ag-nanorods in the gemini micellar solutions depends on the spacer-chain length of gemini surfactants employed.
| Item Type: | Journal Article |
|---|---|
| Publication: | Nanoscale |
| Publisher: | Royal Society of Chemistry |
| Additional Information: | Copyright of this article belongs to Royal Society of Chemistry. |
| Department/Centre: | Division of Chemical Sciences > Organic Chemistry |
| Date Deposited: | 29 Jul 2011 11:20 |
| Last Modified: | 29 Jul 2011 11:20 |
| URI: | http://eprints.iisc.ac.in/id/eprint/39616 |
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