Abstract We report a simple and cost effective way for synthesis of metallic nanoparticles (Au and Ag) using natural precursor clove.
Au and Ag nanoparticles have been synthesized by reducing the aqueous solution of AuCl4 and AgNO3 with clove extract. One interesting aspect here is that reduction time is quite small (few minutes instead of hours as compared
to other natural precursors). We synthesized gold and silver nanoparticles of different shape and size by varying the ratio
of AuCl4 and AgNO3 with respect to clove extract, where the dominant component is eugenol. The evolution of Au and Ag nanoparticles from the
reduction of different ratios of AuCl4 and AgNO3 with optimised concentration of the clove extract has been evaluated through monitoring of surface plasmon behaviour as a
function of time. The reduction of AuCl4 and AgNO3 by eugenol is because of the inductive effect of methoxy and allyl groups which are present at ortho and para positions of
proton releasing –OH group as two electrons are released from one molecule of eugenol. This is followed by the formation of
resonating structure of the anionic form of eugenol. The presence of methoxy and allyl groups has been confirmed by FTIR.
To the best of our knowledge, use of clove as reducing agent, the consequent very short time (minutes instead of hours and
without any scavenger) and the elucidation of mechanism of reduction based on FTIR analysis has not been attempted earlier.
Au and Ag nanoparticles have been synthesized by reducing the aqueous solution of AuCl4 and AgNO3 with clove extract. One interesting aspect here is that reduction time is quite small (few minutes instead of hours as compared
to other natural precursors). We synthesized gold and silver nanoparticles of different shape and size by varying the ratio
of AuCl4 and AgNO3 with respect to clove extract, where the dominant component is eugenol. The evolution of Au and Ag nanoparticles from the
reduction of different ratios of AuCl4 and AgNO3 with optimised concentration of the clove extract has been evaluated through monitoring of surface plasmon behaviour as a
function of time. The reduction of AuCl4 and AgNO3 by eugenol is because of the inductive effect of methoxy and allyl groups which are present at ortho and para positions of
proton releasing –OH group as two electrons are released from one molecule of eugenol. This is followed by the formation of
resonating structure of the anionic form of eugenol. The presence of methoxy and allyl groups has been confirmed by FTIR.
To the best of our knowledge, use of clove as reducing agent, the consequent very short time (minutes instead of hours and
without any scavenger) and the elucidation of mechanism of reduction based on FTIR analysis has not been attempted earlier.
- Content Type Journal Article
- Category Research Paper
- DOI 10.1007/s11051-009-9835-3
- Authors
- Ashwani Kumar Singh, Banaras Hindu University Nanoscience and Nanotechnology Unit, Department of Physics Varanasi 221005 India
- Mahe Talat, Banaras Hindu University Nanoscience and Nanotechnology Unit, Department of Physics Varanasi 221005 India
- D. P. Singh, Southern Illinois University Carbondale Department of Physics Lincoln, Carbondale IL 62901-4401 USA
- O. N. Srivastava, Banaras Hindu University Nanoscience and Nanotechnology Unit, Department of Physics Varanasi 221005 India
- Journal Journal of Nanoparticle Research
- Online ISSN 1572-896X
- Print ISSN 1388-0764
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