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Dual-mode ratiometric fluorescent and colorimetric sensor for rapid visual detection of Hg using poly(T)-tailed ssDNA-silver nanoclusters.
Spectrochim Acta A Mol Biomol Spectrosc
January 2025
College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000 PR China. Electronic address:
Rapid, sensitive, and accurate detection of heavy metal ions is significant for human health and ecological security. Herein, a novel single-stranded DNA with poly(thymidine) tail is tactfully designed as template to synthesize dual-emission silver nanoclusters (ssDNA-AgNCs). The obtained AgNCs simultaneously emit red and green fluorescence, and the red emission can be selectively quenched by Hg, meanwhile the green emission of AgNCs increases synchronously.
View Article and Find Full Text PDFDevelopment of Functional and Hydrolytically Stable Vinyl Monomers as Methacrylate Dental Resin Restorative Alternatives.
Adv Healthc Mater
January 2025
Faculty of Dentistry, University of Toronto, 124 Edward St, Toronto, ON, M5G 1G6, Canada.
Dental resin-based restorative (RBR) materials represent the most ubiquitous biomaterials utilized globally. Methacrylate (MA)-ester based monomers - present in RBRs since the 1960s - experience significantly elevated rates of failure compared to previously used silver/amalgam fillings attributed to their hydrolysis reported in both simulated and in vivo environments. There is currently no alternative RBR chemistry that matches the functional and clinical workflow considerations of MA-RBRs while addressing their limited-service lives.
View Article and Find Full Text PDFReduction and amalgamation of mercury in silver nanoparticle suspensions under dark conditions.
Chemosphere
February 2025
Department of Chemistry and Biochemistry, Florida International University, Miami, 11200 SW 8th St, Miami, FL, 33199, United States; Institute of Environment, Florida International University, 11200 SW 8th St, Miami, FL33199, United States. Electronic address:
Mercury (Hg) is a global pollutant of concern, and its transport and transformation are controlled by various environmental factors, with aquatic particles being an important driver. Understanding the interactions between silver nanoparticles (AgNPs) and Hg under dark condition is a prerequisite for studying the extent of AgNPs interaction with light and its participation in Hg biogeochemical cycling. Herein, under laboratory experimental setting, it was found that the reduction of divalent Hg (Hg(II)) to gaseous elemental Hg (Hg) by AgNPs readily occurred.
View Article and Find Full Text PDFDirect Ag-Hg amalgamation in the nanoscale on the surface of biosourced amorphous silica.
J Environ Manage
December 2024
LLP Scientific Production Technical Center "Zhalyn", Almaty, Kazakhstan; Ecology Research Institute, Khoja Akhmet Yassawi International Kazakh-Turkish University, Turkestan, Kazakhstan. Electronic address:
Mercury poses a significant threat to air, soil, and water ecosystems. Mercury-based alloys, aka amalgams, are already known for their effectiveness in mercury capture in water and gaseous streams. However, limited research has been published on direct amalgamation, the process involving a direct redox reaction between two metals, occurring on the surface of amorphous silica.
View Article and Find Full Text PDFEffect of Ionic Surfactants on Kinetics and Mechanism of the Bi(III) Ion Electroreduction in the Mixed Aqueous-Organic Solutions of Supporting Electrolytes.
Molecules
October 2024
Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, Maria Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland.
This work presents the results of a study on the effect of ionic surfactants: cationic hexadecyltriammonium bromide (CTAB) and anionic sodium salt of sulfonic acid (1OSASS) on the Bi(III) electroreduction process in mixed aqueous-organic supporting electrolyte solutions containing methanol. This study showed that the composition of the supporting electrolyte solution, particularly the methanol and surfactant concentrations, significantly affects the mechanism and rate of the Bi(III) ion electroreduction. Analysis of the influence of the indicated factors on the mechanisms and kinetics of metal ion electroreduction can contribute not only to the optimization of industrial electrochemical processes but also to the development of innovative technological solutions, such as advanced electrochemical materials and novel sensors.
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