Green synthesis of red-emitting carbon dots for bioimaging, sensing, and antibacterial applications

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Journal Year: 2024, Volume and Issue: 328, P. 125458 - 125458

Published: Nov. 20, 2024

Language: Английский

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DNA-Templated Ag Nanocluster/CdSe@ZnS Quantum Dot-Based Platform for Colorimetric and Fluorescence Detection of Organophosphorus Pesticide

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: 8(3), P. 1663 - 1672

Published: Jan. 14, 2025

The agriculture and environmental industries have employed organophosphorus pesticides (OPs) chemicals as insecticides extensively in previous decades, leading to persistent life-threatening issues. Therefore, developing a platform for the efficient identification of OPs is significant protection human health. In this study, strategy colorimetric fluorescence detection by combining quantum dots (QDs) with DNA-templated silver nanoclusters (DNA-AgNCs) was proposed. Technically, DNA-AgNCs will be enhanced once guanine (G)-rich sequences get close form hybrid complexes DNA-AgNCs/G, while quenching can attributed hydrolysate (thiocholine) acetylthiocholine (ATch) that caused acetylcholinesterase (AchE). Based on fact irreversibly inhibit catalytic activity AchE slow down thus, achieved evaluating intensity DNA-AgNCs/G. Additionally, dual-mode system (colorimetric fluorescent) through an ion-exchange reaction between QDs concentration quantified monitoring changes poly(9,9-dioctylfluorene) (PFO) polymer (Pdots) system, PFO Pdots serving stable internal reference. Using trichlorfon model, limit (LOD) 2.55 pg/mL, excellent linear relationship concentrations range 5 × 100–5 105 pg/mL obtained. visual (as low 1.06 pg/mL) realized readily, taking advantage QDs.

Language: Английский

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Curcumin Electroanalysis at a Disposable Graphite Electrode

Biosensors, Journal Year: 2025, Volume and Issue: 15(3), P. 137 - 137

Published: Feb. 23, 2025

Curcumin (CU, turmeric), a polyphenolic phytochemical that is largely used as food spice, has benefits for human health, which have led to increased interest in its therapeutic applications and analysis from different matrices. The two guaiacol moieties of CU are responsible antioxidant properties allow voltammetric quantification. Cyclic differential pulse voltammetry (DPV) investigations at single-use pencil graphite electrode (PGE) emphasized complex pH-dependent processes, involving an equal number protons electrons. Theoretical calculations predicted folded geometry the β-diketone conformers, interact with PGE surface, exposing electroactive only one aromatic ring. Gibbs energy variations structures involved electro-oxidation theoretical electrochemical potential values were calculated. CU’s DPV cathodic peak intensity recorded HB-type 0.05 mol × L−1 H2SO4 varied linearly range 5.00 10−8–5.00 10−6 CU. method’s detection quantification limits 2.12 10−8 6.42 L−1, respectively. practical applicability developed method, successfully tested by assessment dietary supplements, provided recovery 99.28 ± 2.04%.

Language: Английский

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Facile Preparation and Special Optical Properties of Novel Vanadium Oxide Quantum Dots via Solvothermal Method

Journal of Materials Engineering and Performance, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Language: Английский

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