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Single-Entity Electrochemistry of N-Doped Graphene Oxide Nanostructures for Improved Kinetics of Vanadyl Oxidation.
Small
January 2025
School of Chemistry, Trinity College Dublin, Dublin, 2, Ireland.
N-doped graphene oxides (GO) are nanomaterials of interest as building blocks for 3D electrode architectures for vanadium redox flow battery applications. N- and O-functionalities have been reported to increase charge transfer rates for vanadium redox couples. However, GO synthesis typically yields heterogeneous nanomaterials, making it challenging to understand whether the electrochemical activity of conventional GO electrodes results from a sub-population of GO entities or sub-domains.
View Article and Find Full Text PDFSite-Specific Stochastic Rates and Energetics of Ag Nucleation on Highly Ordered Pyrolytic Graphite.
ACS Nano
November 2024
Department of Chemistry, University of Texas, Austin, Texas 78712, United States.
Article Synopsis
- Nucleation plays a crucial role in electrochemical phase transitions, influencing processes like battery technology and nanoparticle synthesis.
- Surface defects can boost nucleation rates, but measuring these rates at specific sites has been difficult due to bulk averaging effects.
- The study employs scanning electrochemical cell microscopy (SECCM) to measure nucleation rates on HOPG surfaces, revealing a significant difference in nucleation energetics between the step edge and basal plane, which can help understand nucleation in various electrochemical systems.
Electromimetic molecularly imprinted Polymersensor for wastewater emtricitabine.
Anal Chim Acta
November 2024
SensorLab (University of the Western Cape Sensor Laboratories), Chemical Sciences Building, University of the Western Cape, Bellville, 7535, Cape Town, South Africa; South African Research Chair Initiative (SARChI) Chair for NanoElectrochemistry & Sensor Technology, University of the Western Cape, Bellville, 7535, Cape Town, South Africa. Electronic address:
Background: Emtricitabine (FTC) is a commonly prescribed anti-human immunodeficiency virus (HIV) drug that has been classified as an emerging environmental pharmaceutical micropollutant due to its poor metabolism, refractory nature to wastewater treatment, continuous discharge with wastewater effluent and accumulation in the aquatic environment. Although there are no reported limits and toxicity of the drug in the environment yet, it is crucial to develop onsite, rapid, selective and ultrasensitive water sensing systems for FTC to ensure efficient risk management and environmental sustainability.
Results: Herein, a molecularly imprinted poly(para-aminobenzoic acid) (MIP) was electrochemically prepared on iron oxide nanoparticles modified glassy carbon electrode (MIP/FeO NPs/GCE) for selective detection of FTC using differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS).
Subsets of Nanometer Vesicles in the Fly Release Differential Fractions of Vesicular Serotonin Content during Exocytosis.
Angew Chem Int Ed Engl
October 2024
Department of Chemistry and Molecular Biology, University of Gothenburg, Medicinaregatan 19, 41390, Gothenburg, Sweden.
Serotonin, a monoamine neurotransmitter, is important in both the central nervous system (CNS) and the peripheral nervous system. Malfunction of serotonin signaling leads to various disorders. We studied serotonin signaling from serotonergic neurons inside the ventral nerve cord of Drosophila melanogaster.
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