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Switchable spontaneous polarization is the vital property of ferroelectrics, which leads to other key physical properties such as piezoelectricity, pyroelectricity, and nonlinear optical effects, etc. Recently, organic–inorganic hybrid perovskites with 2D layered structure have become an emerging branch of ferroelectric materials. However, most of the 2D hybrid ferroelectrics own relatively low polarizations...
To boost the kinetic process of the oxygen evolution reaction (OER), hybrid CoNiFe/Fe(Fe,Mo,Al)2O4 coatings are deposited on pure Ti substrates (namely, CoNiFe/Fe(Fe,Mo,Al)2O4/Ti electrodes). This new coating features a dense inner layer together with an outer layer of microcone arrays (MCAs). The electrochemical surface area of the electrodes is modulated by controlling the geometrical factors of...
Here, a novel microfluidic test kit combining ultrahigh throughput hydrodynamic filtration and sandwich immunoassay is reported. Specifically, nano and microbeads coated with two different, noncompetitive antibodies, are used to capture the severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) nucleocapsid (N) proteins simultaneously, forming larger complexes. Microfluidic filtration discards...
COVID‐19 Diagnostics
In article number 2104009, Jiang Xu, Yan Zhang, Taotao Lao, and co‐workers present a handheld microfluidic filtration platform that enables rapid, low‐cost and robust self‐testing of the SARS‐CoV‐2 virus. The cover design emphasizes its important advantages: (1) Equipment‐free handheld injection, represented by the hands manipulation; (2) Visible and easy readout: a Taichi diagram...
Nanotechnology currently enables the fabrication of uniform solid nanoparticles and liquid nano‐emulsions, but not uniform gaseous nanobubbles (NBs). In this article, for the first time, a method based on microfluidics that directly produces monodisperse NBs is reported. Specifically, a two‐component gas mixture of water‐soluble nitrogen and water‐insoluble octafluoropropane as the gas phase are used...
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