Bio-fabrication of gold nanoparticles using aqueous extract of red tomato and its use as a colorimetric sensor

Abstract

In this work, we report a green method for the synthesis of gold nanoparticles (GNP) using the aqueous extract of red tomato (Lycopersicon esculentum). We believe that citric acid and ascorbic acid present in tomato juice are responsible for the reduction of gold ions. This biosynthesized GNP in the presence of sodium dodecyl sulfate has been used as a colorimetric sensor to detect and estimate the pesticide, methyl parathion. The GNP in the presence of methyl parathion shows a new peak at 400 nm due to the formation of 4-nitrophenolate ion by catalytic hydrolysis of methyl parathion in alkaline medium. A calibration curve between the absorption coefficients of the 400-nm peak versus the concentration of the pesticide allows the quantitative estimation of the 4-nitrophenolate ion, thereby enabling indirect estimation of methyl parathion present in the system.

Phyto-crystallization of silver and gold by Erigeron annuus (L.) Pers flower extract and catalytic potential of synthesized and commercial nano silver immobilized on sodium alginate hydrogel

“…Supplementary Fig. 1b shows the characteristic surface plasmon resonance absorption band at 537 nm (AuNPs), the same absorption band was earlier observed in silver NPs production from Solanum torvum [20], Swietenia mahogani JACQ leaves [25], Cannonball leaves [26], and in gold NP production from Momordica charantia fruit peel extract [27], common aromatic plants [28], and red tomato aqueous extract [29].…”

Synthesis of silver and gold nanoparticles using Jasminum nervosum leaf extract and its larvicidal activity against filarial and arboviral vector Culex quinquefasciatus Say (Diptera: Culicidae)

“…Bioreduction of metal NPs using a combination of biomolecules found in plant extract is environmentally benign yet chemically complex. Extracts from plants may act as both reducing and capping agents in NPs synthesis (Barman et al 2013). In the present study, the AgNPs and AuNPs were synthesized by using aqueous leaf extracts of J. nervosum.…”

Next Generation Plant Biotechnology

“…Nanoparticles used in agricultural plants generally range in size-dimension from 5 to 200 nm (Ghormade et al 2011). A wide variety of physical and chemical methods have been used to fabricate nanoparticles, including iron, silver, gold, silicates, and polymers (Mohanraj and Chen 2006; Hayashi et al 2008;Barman et al 2014). However, use of toxic compounds used in producing nanoparticles by these methods limit their application.…”

“…However, use of toxic compounds used in producing nanoparticles by these methods limit their application. More recently eco-friendly biological methods using plants as biofactories for the production of metallic nanoparticles are being used (Nair et al 2010;Hasna et al 2012;Burris et al 2012;Kavitha et al 2013;Rai and Yadav 2013;Marchiol et al 2014;Vadlapudi and Kaladhar 2014;Barman et al 2014). Potential applications of nanobiotechnology in agriculture include: (1) nano-encapsulated agrochemicals, including fertilizers, for controlled release in the soil; (2) nano-encapsulated herbicides and insecticides for weed and pest control; and (3) nanoparticle-mediated genetic material delivery in plants (Nair et al 2010;Ghormade et al 2011;Rai and Ingle 2012).…”