Synthesis of Fullerene (C 60 )-Silver Nanoparticles Using Neem Gum Extract Under Microwave Irradiation

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Synthesis of Fullerene (C60)-Silver Nanoparticles Using Neem Gum Extract Under Microwave Irradiation S. P. Vinay 1 Accepted: 12 October 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020

Abstract Fullerene [C60]-linked silver nanoparticles (Ag@C60 NPs) were prepared using neem gum extract as fuel via microwave irradiation method. The Ag@C60 NPs were characterized by XRD and EDAX studies; the morphologies of the prepared NPs were studied by SEM and TEM analysis. The TEM data revealed that bearing bore quasi-spherical like structures were obtained. Furthermore, in vitro studies revealed dose-dependent cytotoxic effects of Ag@C60 NPs treated A549 cell line. This is the first report on the green synthesis of Ag@C60 NPs using neem gum extract under microwave irradiation. The results of the present study indicated that Ag@C60 NPs exhibited a promising cytotoxicity assay. Keywords Silver nanoparticles . Fullerene (C60) . Neem gum . TEM . Lung cancer cell lines

1 Introduction Neem gum, a distinctive plant gum that originates from the tree (Melia azadirachta, Meliaceae), is a complex polysaccharide acid salt. It has been medicinally used in India for many centuries [1]. Neem gum on hydrolysis yields D-galactose, Dglucuronic acid, L-fucose, and L-arabinose. The aldobiuronic acid is the ingredient of neem gum derived from graded hydrolysis that is shown to be 4-O-(D-glucopyranosyluronic acid)-D-galactopyranose. Silver is an important and distinctive inorganic substance, because of its distinctive characteristics and novel applications in various fields of science and technology [2]. Silver has the capacity to exhibit piezoelectric, pyroelectric, optoelectronics, catalysis, and semiconducting properties [3]. Due to this, silver is a multifunctional compound that is used in the field of light-emitting diodes, biosensors, diluted and ferromagnetic materials for spintronics solar cells, photocatalysis, and transistors and also acts as an antioxidant and antibacterial agent [4]. Fullerene assemblies on metal surfaces have received much attention both experimentally and theoretically. Various methods were discovered for synthesizing Ag@C60

* S. P. Vinay [email protected] 1

Research and Development Center, Department of Chemistry, Shridevi Institute of Engineering and Technology, Tumakuru 572106, India

NPs, but these methods need the costliest starting material, lengthy procedures, sophisticated apparatus, and more time required. Direct binding of fullerene C60 on the surface of Ag NPs has not been reported to date, to the best of our knowledge. However, there have been reports of fullerenes anchored to Ag NPs via functional groups such as thiol [5–7] and bipyridyl groups [8]. The metal-matrix nanocomposites are an interesting class of nanotechnology due to their bi-functional properties for applications in memory devices, solar cells, and sensors [9–13]. The matrices based on carbon materials such as fullerenes (the widespread one is C60) have preserved their position in the industry due to their uni