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New three‑component method unlocks high‑entropy alloy nanoparticle synthesis
Northwestern University researchers introduced a three‑component synthesis that simultaneously controls composition and high‑index surface facets of high‑entropy alloy nanoparticles. Using a megalibrary chip, the approach can generate about 36 million particles covering 90 000 distinct compositions, paving the way for high‑throughput catalyst discovery.
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ATLANT 3D and NUS Partner on AI-Driven Materials Discovery Foundry in Singapore
ATLANT 3D and NUS I-FIM are collaborating to build AI-driven, atomic-scale materials discovery foundry in Singapore. The post ATLANT 3D and NUS Partner on AI-Driven Materials Discovery Foundry in Singapore appeared first on EE Times Asia.
EE Times Asia
Synergistic Enrichment and Catalytic Sensing Platform Based on ZIF-8-NH₂/Dynamic Schiff Base Hydrogel for Ultrasensitive Detection of Hydroquinone
IntroductionThe development of sensing interfaces that can simultaneously achieve efficient enrichment of targets and enhanced electron conduction is the key to improving the performance of phenolics detection in foodMethodsIn this paper, a novel electrochemical sensing platform consisting of an aminated zeolite imidazolium ester backbone material (ZIF-8-NH2) composited with sodium oxidized alginate (OSA)/carboxymethyl chitosan (CMCS) dynamic hydrogel (denoted as OC hydrogel) was successfully constructed. The platform exploits the mild Schiff base reaction between OSA and CMCS to construct a three-dimensional dynamic hydrogel substrate without an external cross-linking agent. On this basis, the combination of ZIF-8-NH2 and OC hydrogel was introduced. The amino groups on the surface of ZF-8-NH2 and the aldehyde groups of OSA are utilized to form covalent nano-crosslinking points, simultaneously exerting their electrocatalytic activity and pre-enrichment effect.ResultsElectrochemical studies demonstrated that the composite interface significantly accelerated electron transfer kinetics. The constructed sensor demonstrates exceptional analytical performance for hydroquinone. The detection limit is as low as the nanomolar level (16.7 nM), and the linear range extends up to four orders of magnitude (0.05 to 1800 μM). Furthermore, the sensor demonstrated its efficacy in the rapid analysis of a wide range of real samples (tap water, drinking water, beverages, and vegetable juices), with recoveries ranging from 97.4 to 103.6%.DiscussionThe observed performance is attributed to the multiple synergistic effects of the ZIF-8-NH2/OC hydrogel interface. The covalent connection between ZIF-8-NH2 and the OSA/CMCS hydrogel prevents nanomaterial detachment, ensuring interface stability. Meanwhile, ZIF-8-NH₂ reduces the overpotential for hydroquinone electrochemical oxidation and achieves significant signal amplification through pre-enrichment of target molecules. These features substantiate the reliability of the sensor in practical applications, offering an innovative solution for the detection of harmful substances in food.
Frontiers in Nutrition
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Cooling solar modules with nanofluids based on graphene oxide, Mxene #energysky -- via pv magazine global: https://t.co/KiDtc1yi4D