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Sunlight based strategy for rapid synthesis of silver nanoparticles using aqueous garlic (Allium sativum) extract


Shokit Hussain and Zaheer Khan*


Nano-science research Lab, Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India

Email: drkhanchem@yahoo.co.in



Green bio-chemical methods for the synthesis of advanced silver nanomaterials by the natural resources especially from the seeds, leaves and fruits were the eco-friendly alternatives to chemical reduction methods [1]. A green synthetic route for the production of silver nanoparticles using aqueous garlic extract is being reported for the first time in presence of cetyltrimethylammonium bromide [2]. The silver nanoparticles were synthesized by exposing a mixture containing (2 cm3 of


0.01 mol dm-3 AgNO3 + 2 cm3 of 0.01 mol dm-3) and diluted aqueous garlic extract (2 cm3; total volume 50 cm3) under bright sunlight for 2 min. The garlic extract components served as both reducing and capping agents in the synthesis of silver nanoparticles while the sunlight acted as catalyst. The synthesized nanoparticles were characterized using UVvisible spectrophotometer; transmission electron microscopy, and Fourier transform infra red spectrometry. The nanoparticles were found to be poly-dispersed in nature, spherical in shape and of 20 nm in size. The pure crystalline nature was determined from selected area electron diffraction.


Keywords: Nanomaterials, Garlic Extract, Morphology, Sunlight



1. Y. Sun, Y. Xia, Science 298 (2002) 2176.

2. Z. Khan, S. A. AL-Thabaiti, A. Y. Obaid, Z. A. Khan, A. O. Al-Youbi, J. Colloid Interface Sci. 367 (2012) 101.