Scientific validation of Vedic knowledge on 'Rajatam' and the convection current-assisted synthesis of silver nanoparticles



In the Vedic literature, one can see the mention of silver, 'Rajatam', for diversified day-to-day applications to lead a healthy life. The paper reports the scientific validation of traditional knowledge of synthesising chemical-free, stable metal nanoparticles (NPs), taking silver as an example. Here, silver nanoparticles (SNPs) are synthesised with the assistance of convection current in the water. The prolonged heating of double-distilled water in a silver vessel enables to get a colloidal solution of SNPs. The SNPs produced are characterised by UV-Visible absorption spectroscopy, Field-emission Scanning Electron Microscopy, High-resolution Transmission Electron Microscopy, and Energy Dispersive X-Ray Spectroscopy. Stability of SNPs is revealed through ageing studies with glucose as the surfactant. The method could synthesise stable SNPs of size 30-40 nm. This accounts for the possible reason for taking silver as the material for utensils for cooking food by the ancient Indians, Greek, Romans, Persians and Egyptians.



Convection current, Nanoparticles, Rajatam, Scientific validation, Silver

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