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In this work, fabrication of Cu2O@Cu1.75S core‐shell octahedrons was achieved through a facile water bath stirring process. Compared with pure Cu2O, the composite showed enhanced sensing performance for NO2. The response value of Cu2O@Cu1.75S to 5 ppm NO2 at 40 °C is seven times that of Cu2O to 5 ppm NO2 at 75 °C. Moreover, Cu2O@Cu1.75S has the ability to detect 100 ppb NO2 and has good NO2 sensing...
A sensitive and specific electrochemical immunosensor was developed with α‐fetoprotein (AFP) as the model analyte by using gold nanoparticle label for enzymatic catalytic amplification. A self‐assembled monolayer membrane of mercaptopropionic acid (MPA) was firstly formed on the electrode surface through gold‐sulfur interaction. Monoclonal mouse anti‐human AFP was covalently immobilized to serve as...
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