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Mineral-Mediated Epitaxial Growth of CoO Nanoparticles for Efficient Electrochemical HO Activation.
ACS Nano
January 2025
Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, China.
Article Synopsis
- Solution-phase epitaxy is an effective method for creating functional nanomaterials, with the choice of support significantly influencing their properties.
- The research focuses on using calcination-modified kaolinite as a support to enhance the growth of hexagonal CoO nanoparticles, achieving over 40 times higher activity in HO electrochemical activation compared to those without support.
- Findings highlight the importance of aluminum sites in kaolinite, which improve the formation and electron transfer processes of CoO nanoparticles, ultimately demonstrating the potential of nanoclays as valuable supports in nanomaterial synthesis.
On-Surface Synthesis of Ni-Porphyrin-Doped Graphene Nanoribbons.
ACS Nano
December 2024
School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, U.K.
On-surface synthesis of functional molecular structures provides a route to the fabrication of materials tailored to exhibit bespoke catalytic, (opto)electronic, and magnetic properties. The fabrication of graphene nanoribbons via on-surface synthesis, where reactive precursor molecules are combined to form extended polymeric structures, provides quasi-1D graphitic wires that can be doped by tuning the properties/composition of the precursor molecules. Here, we combine the atomic precision of solution-phase synthetic chemistry with on-surface protocols to enable reaction steps that cannot yet be achieved in solution.
View Article and Find Full Text PDFDesign and Validation of Specific Oligonucleotide Probes on Planar Magnetic Biosensors.
Anal Chem
December 2024
Department of Mechanical and Biomedical Engineering, Ewha Womans University, Seoul 03760, Republic of Korea.
Article Synopsis
- Planar DNA biosensors use surface-attached oligonucleotide probes to identify target molecules for diagnostics, aiming to enhance sensitivity and specificity by optimizing hybridization properties.
- Challenges arise due to the complex interactions between solid surfaces and target solutions, making it difficult to predict hybridization affinities and off-target binding accurately.
- The article presents practical design guidelines for oligonucleotide probes, including specific parameters like Gibbs free energy and melting temperature, while also considering factors like secondary structures to improve sensor performance.
Tuning Optical and Electrical Properties of Vanadium Oxide with Topochemical Reduction and Substitutional Tin.
Chem Mater
November 2024
National Renewable Energy Laboratory, Golden, Colorado 80401, United States.
Vanadium oxides are widely tunable materials, with many thermodynamically stable phases suitable for applications spanning catalysis to neuromorphic computing. The stability of vanadium in a range of oxidation states enables mixed-valence polymorphs of kinetically accessible metastable materials. Low-temperature synthetic routes to, and the properties of, these metastable materials are poorly understood and may unlock new optoelectronic and magnetic functionalities for expanded applications.
View Article and Find Full Text PDFDetection of factor Xa activity using giant magnetoresistive biosensors.
Anal Chim Acta
December 2024
Department of Mechanical and Biomedical Engineering, Ewha Womans University, Seoul, 03760, Republic of Korea; Graduate Program in Smart Factory, Ewha Womans University, Seoul, 03760, Republic of Korea. Electronic address:
Background: As anticoagulants are widely used to treat patients with atrial fibrillation (AF) and other thrombotic conditions, it is necessary for physicians to determine whether the medication has been taken in emergencies. Among many anticoagulants, rivaroxaban has attracted attention due to its safety and convenience. Since rivaroxaban inhibits activated coagulation factor X (factor Xa), measuring factor Xa activity can determine the presence of rivaroxaban.
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