Journal
JOURNAL OF NANOPARTICLE RESEARCH
Volume 12, Issue 5, Pages 1711-1721Publisher
SPRINGER
DOI: 10.1007/s11051-010-9894-5
Keywords
Silver nanoparticles; Gold nanoparticles; Biogenic synthesis of nanoparticles; Sunlight; Nanobiotechnology
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Funding
- Council of Scientific and Industrial Research (CSIR), New Delhi
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The development of rapid and ecofriendly processes for the synthesis of silver (Ag) and gold (Au) nanoparticles is of great importance in the field of nanotechnology. In this study, the extracellular production of Ag and Au nanoparticles was carried out from the leaves of the plants, Tridax procumbens L. (Coat buttons), Jatropa curcas L. (Barbados nut), Calotropis gigantea L. (Calotropis), Solanum melongena L. (Eggplant), Datura metel L. (Datura), Carica papaya L. (Papaya) and Citrus aurantium L. (Bitter orange) by the sunlight exposure method. Qualitative comparisons of the synthesized nanoparticles between the plants were measured. Among these T. procumbens, J. curcas and C. gigantea plants synthesized < 20 nm sized and spherical-shaped Ag particles, whereas C. papaya, D. metel and S. melongena produced < 20 nm sized monodispersed Au particles. The amount of nanoparticles synthesized and its qualitative characterization was done by UV-vis spectroscopy and transmission electron microscopy (TEM), respectively. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used for structural confirmation. Further analysis carried out by fourier transform infrared spectroscopy (FTIR), provided evidence for the presence of amino groups, which increased the stability of the synthesized nanoparticles.
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