Gold nanoparticles (AuNPs): A versatile material for biosensor application

Talanta Open, Journal Year: 2024, Volume and Issue: 9, P. 100327 - 100327

Published: May 16, 2024

Gold nanoparticles (AuNPs) have become the focus of rapid research due to their unique optical and electronic properties. There has been a noticeable increase in papers relating AuNPs, with over 71,000 publications between 2019 2024. AuNPs possess exceptional stability, low resistance, high conductivity, extensive light interaction, making them well-suited for biological sensing applications. This literature study begins by examining different approaches synthesizing including chemical, physical, methods, before exploring use as biosensors. A comprehensive examination various detection localized surface plasmon resonance (LSPR), luminescence, surface-enhanced Raman scattering (SERS), (SPR), electrochemical properties, is facilitated through an exploration fundamental principles classification We primarily on using medical diagnostics, highlighting current advancements disease AuNPs-based biosensors conditions like COVID-19, dengue fever, diabetes. The review emphasizes achievements synthesis bright prospects biocompatible efficient biosensor

Language: Английский

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Fewer, but Better: On the Benefits of Surfactant‐Free Colloidal Syntheses of Nanomaterials

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(5)

Published: Feb. 1, 2025

Abstract Colloidal syntheses are common bottom‐up synthetic approaches to obtain various nanomaterials, e.g., gold nanoparticles, where a precursor, HAuCl 4 , is reduced in the presence of reducing agents solvent. It often claimed, and almost dogmatically believed, that stabilizers, capping agents, ligands, surfactants, or other additives must be added ensure stability colloids. Although there systematic use such chemicals literature, range surfactant‐free, additive‐free, colloidal have been reported. In those syntheses, solvent plays role source and/or stabilizers. Recently, alkaline solutions low‐viscosity mono‐alcohols, as ethanol, has shown lead stable surfactant‐free colloids for metal nanoparticles. Here, with example nanoparticles obtained at room temperature, it adding commonly reported trisodium citrate, PVP, SDS, poly(NIPAM), CTAB, hydroquinone, actually does not any advantages compared synthesis performed an mixture water 20 vol.% ethanol. The results stress potential more conventional surfactant‐ additive‐assisted strategies develop greener research studies syntheses.

Language: Английский

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Insights into interaction of quaternary ammonium salt cationic surfactants with different branched-chain lengths and DNA: Multi-spectral analysis, viscosity method, and gel electrophoresis

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 140095 - 140095

Published: Jan. 1, 2025

Language: Английский

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Quercetin capped Au-Ag Bimetallic Nanoparticles for the Detection of Calcium dobesilate monohydrate in Biological and Environmental Samples.

Journal of Molecular Structure, Journal Year: 2025, Volume and Issue: unknown, P. 141808 - 141808

Published: Feb. 1, 2025

Language: Английский

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Thermodynamics, reaction Dynamics, and Temperature-Dependent Mechanistic insights into Surfactant-Free and Surfactant-Mediated formation of selenium nanoparticles in aqueous media

Journal of Molecular Liquids, Journal Year: 2025, Volume and Issue: unknown, P. 127428 - 127428

Published: March 1, 2025

Language: Английский

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Low cost magnetically reuses ZnO/Fe3O4 nanoparticles towards photocatalytic behavior of methyl orange degradation

Journal of the Indian Chemical Society, Journal Year: 2025, Volume and Issue: unknown, P. 101748 - 101748

Published: May 1, 2025

Language: Английский

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Surfactant-Mediated Transport of Copper Oxide Nanoparticles in Porous Media: Effects of Electrolytes, Phosphate and Organic Matter

Process Safety and Environmental Protection, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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Environmental analysis of nitrobenzene using newly synthesized anisotropic gold nanostructures: Reaction kinetics and electrocatalytic activity

Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: 408, P. 125303 - 125303

Published: Aug. 1, 2024

Language: Английский

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Fewer, but better: on the benefits of surfactant-free colloidal syntheses of nanomaterials

Published: Oct. 10, 2024

Colloidal syntheses are common bottom-up synthetic approaches to obtain various nanomaterials, e.g. gold nanoparticles, where a precursor, HAuCl4, is reduced in presence of reducing agents solvent. It often claimed, and almost dogmatically believed, that stabilizers, capping agents, ligands, surfactants or other additives, must be added ensure the stability colloids. Although there systematic use such chemicals literature, range surfactant-free, additive-free, colloidal have been reported. In those syntheses, solvent plays role source and/or stabilizers. Recently, alkaline solutions low viscosity mono-alcohols, as ethanol, has shown lead stable surfactant-free colloids for metal nanoparticles. Here, with example nanoparticles obtained at room temperature, it adding commonly reported trisodium citrate, PVP, SDS, poly(NIPAM), CTAB, hydroquinone, actually does not any advantages compared synthesis performed mixture water 20 v.% ethanol. The results stress potential more conventional surfactant- additives- assisted strategies develop greener research studies syntheses.

Language: Английский

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Efficient stabilizing agent-free synthesis of gold nanoparticles via square-wave pulse deposition for enhanced catalytic performance in ethanol electrooxidation

Materials Reports Energy, Journal Year: 2024, Volume and Issue: unknown, P. 100294 - 100294

Published: Oct. 1, 2024

Language: Английский

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