ORCID Profile
0000-0001-5352-5415
Current Organisation
Faculty of Medicine University of Coimbra
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Publisher: Springer Science and Business Media LLC
Date: 20-06-2004
DOI: 10.1038/NMAT1152
Publisher: Elsevier BV
Date: 07-2007
Publisher: American Chemical Society (ACS)
Date: 16-12-2005
DOI: 10.1021/LA052055Q
Abstract: In this paper, we demonstrate the effect of halide ions on the formation of biogenically prepared gold nanotriangles using the leaf extract of lemongrass (Cymbopogon flexuosus) plant. We have also studied the effect of halide ions on the morphology of biogenic nanotriangles. It has been shown that iodide ions have a greater propensity to transform flat gold nanotriangles into circular disk-like structures as compared to other halide ions. The study also suggests that the presence of Cl- ions during the synthesis promotes the growth of nanotriangles, whereas the presence of I- ions distorts the nanotriangle morphology and induces the formation of aggregated spherical nanoparticles. The change in the morphology of gold nanotriangles has been explained in terms of the ability of the halide ions to stabilize or inhibit the formation of (111) faces to form [111] oriented gold nanotriangles. Last, we have also shown that the temperature is an important parameter for controlling the aspect ratio and the relative amounts of gold nanotriangles and spherical particles. The results show that, by varying the temperature of reaction condition, the shape, size, and optical properties of anisotropic nanoparticles can be fine-tuned.
Publisher: Elsevier BV
Date: 07-2004
Publisher: American Chemical Society (ACS)
Date: 14-01-2005
DOI: 10.1021/CM048292G
Location: United Kingdom of Great Britain and Northern Ireland
Location: Portugal
No related grants have been discovered for Akhilesh Rai.