Localized surface plasmon resonance light-scattering detection of Hg(ii) with 3-aminopropyltriethoxysilane-assisted synthesis of highly stabilized Ag nanoclusters

Abstract

We employed 3-aminopropyltriethoxysilane to assist the synthesis of Ag NCs using polyethyleneimine as the template for detecting Hg(2+) by localized surface plasmon resonance light-scattering technology. The developed selective and sensitive method presaged more opportunities for application in environmental systems.

Carbazole‐based conjugated polymer covalently coated Fe3O4 nanoparticle as efficient and reversible Hg2+ optical probe

“…Therefore, fluorescent sensors represent a new family of high‐performance probing substrates . To date, many fluorescent sensors for Hg 2+ detection have been reported for operating platforms, including small molecules, polymers, nanomaterials, and nanocomposites . These fluorescent sensors can be implemented in both organic and aqueous environments.…”

Chemical Reagents for Sensor Design and Development

“…For instance, 3-aminopropyl-triethoxysilane (APTES) is a versatile agent for modifying the surface chemistry of amorphous Si:H sensors for NaCl and bovine serum albumin [8]. APTES can assist the synthesis of silver nanoparticles using polyethyleneimine as a template for detecting Hg 2+ by localized surface plasmon resonance light scattering technology [9]. A surface plasmon resonance-based human fetuin-A immunoassay involves the amino groups of APTES-functionalized Au chip that are cross-linked to the carboxyl groups of anti-HFA antibody using 1-ethyl-3-dimethylaminopropyl carbodiimide hydrochloride and sulfo-N-hydroxy succinimide [10].…”

Recognition and determination of multi-metal ions based on silver nanoclusters capped by polyethyleneimine with different molecular weights

“…18 This quenching mechanism was due to direct interaction between the Ag nucleus and Hg 2+ , which had no necessary connection with the templates and synthetic methods, so almost all of the silver nanoclusters, synthesized with various templates, could be utilized to determine Hg 2+ , and in the meanwhile, Cu 2+ and Cr 3+ would not interfere with the detection of Hg 2+ as reported in the literature. 2,11,[17][18][19][20][21][22][23][24] However, there were also some Ag nanoclusters that were reported as being able to sense Cu 2+ and Cr 3+ with no interference from Hg 2+ . 25,26 Some studies explained that the differences of selectivity were caused by the templates, and that the interaction between the templates and metal ions may result in electron transfer 27 or energy transfer, 15,28 which could also cause the fluorescence quenching of Ag nanoclusters.…”