In this manuscript we have reported an easy, eco-friendly and green chemical process for the synthesis of silver nanoparticles (AgNPs) by taking silver nitrate as the metal precursor and aqueous extract of fruits of phyllanthus acidus: phyllanthus family as both the reducing agent as well as capping agent. The formation of AgNPs has been investigated using UV–Vis spectroscopy where gradual generation of an intense surface plasmon resonance band at 425 nm clearly indicates the formation of silver nanoparticles. The optimum condition for the formation of AgNPs has also been established using UV–Vis spectroscopy. AgNPs have further been characterized by powder X-ray diffraction method, Fourier transform infrared spectroscopy, Scanning Electron Microscope and Transmission Electron Microscope. Interestingly, the synthesized AgNPs is used successfully for the detection of environmentally hazardous mercury ions in aqueous solution by colorimetric method. Furthermore, it has been found that the silver nanoparticles show reversible response towards mercury ion. Again, these AgNPs shows observable antibacterial activity against A. hydrophila. © 2019

I SK

M A KHAN

S GHOSH

D ROY

S PAL

S HOMECHUADHURI

M A ALAM

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Nano-Structures and Nano-Objects

We report here a very effective, economically viable and environment-friendly protocol for the synthesis of stable, crystalline, spherical Ag nanoparticles (NPs) with appreciable monodispersity using the Burmese grape (Baccaurea ramiflora Lour.; family: Phyllanthaceae) fruit juice as a green multifunctional agent (GMA) under sonochemical condition. These nanoparticles showed strong and selective Hg2+ ion-sensing activity (in μM level), analogous to the molecular logic gate function, in aqueous medium over a wide range of pH (3.73-11.18), which is based on their visual color change, and hence the change in their surface plasmon resonance (SPR) peak position and intensity. Phytochemical screenings of the GMA were also done to identify its active constituents responsible for the rapid synthesis, stabilization and selective sensing activity of the Ag NPs. The Ag NP surface-adsorbed functionalities, which are from these active biomolecules, induced a change in aggregation behavior of these NPs, which ultimately enhanced the ion-sensing activity of these NPs compared to citrate-, CTAB-, SDS- and PVP-stabilized Ag NPs synthesized by chemical method. Moreover, the use of this non-toxic, green multifunctional agent may confer biocompatibility to the Ag NPs, opening up the possibility for their use in the in vivo detection of toxic heavy metal ions. © The Royal Society of Chemistry 2015.

RSC Advances

Burmese grape fruit juice can trigger the "logic gate"-like colorimetric sensing behavior of Ag nanoparticles towards toxic metal ions

Journal of Food and Drug Analysis

Estimation of total flavonoid content in propolis by two complementary colometric methods

Nano-Structures & Nano-Objects

Highly sensitive detection and removal of mercury ion using a multimodal nanosensor

ZnO/CuO nanocomposite prepared in one-pot green synthesis using seed bark extract of Theobroma cacao

Spherical nanosilver: Bio-inspired green synthesis, characterizations, and catalytic applications

A reversible biocompatible silver nanoconstracts for selective sensing of mercury ions combined with antimicrobial activity studies

Journal	Data powered by TypesetNano-Structures and Nano-Objects
Publisher	Data powered by TypesetElsevier B.V.
ISSN	2352-507X