Fine Tuning of Polymer-Coated Gold Nanohybrids: Sensor for the Selective Detection of Quinalphos and Device Fabrication for Water Purification

Abstract

Noble polymer P 1 was synthesized and utilized to produce organic nanoparticles (ONPs). The ONPs were used to formulate Au@ONP nanohybrids. The Au@ONP was subsequently fine-tuned for the selective detection of quinalphos via decorating Cu 2+ on its surface. The selective detection of quinalphos in an aqueous medium was achieved, and a detection limit of 2.4 nM was obtained. To validate triple-layered Cu(II)-Au@ONP for quinalphos sensing, simulated real sample analysis was done. Finally silica coating of Cu(II)-Au@ONP was utilized for solid-state quinalphos sensing and removal from contaminated water samples using its cartridgebased assembly.

Harnessing selectivity in chemical sensing via supramolecular interactions: from functionalization of nanomaterials to device applications

“…In fact, various receptors having thiol or other sulfur-containing moieties can covalently tether metallic and metal oxide surfaces. 56,57 More harsh approaches towards these linkages include metal-carbon (by aryl diazonium derivatives), 58 metal-carbene or metal-nitrene (via diazo derivatives), 59 or metal-acetylide/-vinylidene (via acetylene derivatives) 60 covalent bonds. Despite its weaker interactions, amines, ammonium ions, negatively charged carboxylate groups and phosphines can also be used for the effective NP functionalization.…”

“…Depending on the recognition event, the sensor readout can be a change in the optical properties, 56,[91][92][93]95,96,104,105,110,113 or in the electrical characteristics 98,108 of 0D nanostructures. The extraordinary optical properties of metallic NPs due to the plasmonic phenomenon have given rise to the rapid development of colorimetric sensors.…”

“…In addition to colorimetric, fluorometric 0D chemical sensors are also highly sensitive. 56,92,105 The main employed This journal is © The Royal Society of Chemistry 2021 strategy relies on the complexation of the functionalized NPs with the target analyte, e.g., ion or (bio)molecule, resulting in the quenching or restoration of the initial fluorescence of the system. 17 Sensors utilizing surface-enhanced Raman scattering (SERS) spectroscopy are equally powerful, allowing the ultrasensitive detection of many species even at a single-molecule level.…”

Calix[4]pyrrole‐Grafted Gold Nanoparticles as a Turn‐On Fluorescence Sensor for Noxious Fungicide Dimoxystrobin and Their Anti‐Cancer Activity against the KB‐3‐1 Cell Line

“…Recently, Huerta-Aguilar et al have prepared fluorometric gold nanosensor (FONPs) used to recognize the cysteine and cytosine in real samples, [22] Rani et al have designed the polymer-coated gold nanohybrid which had sensed the quinalphos with enhanced fluorescence emission signal. [23] Prathap et al have reported imidazole-based gold complexes (NHCÀ Au(I)) to direct clinical determination of glucose. [24] Kaur et al prepared silver nanoparticles decorated with reduced graphene oxide for ascorbic acid, dopamine, uric acid, and tryptophan.…”

Green Synthesis of Silver Nanoparticles by Extracellular Extracts from Aspergillus japonicus PJ01

“…Recently, the preparation of MNPs in an aqueous solution by using polymers as stabilizing agents has been reported. Rani et al [ 2 ] synthesized thiourea-linked polymer as a starting entity to develop a sensor for quinalphos detection. Huerta-Aguilar et al [ 3 ] used thiophene-based organic nanoparticles decorated with AuNPs to detect cysteine and cytosine in real samples, such as Saccharomyces cerevisiae cells.…”