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Ultrafine spherical silicon dioxide powder samples, after water extraction treatment respectively by inductively coupled plasma atomic emission spectrometry (ICP-AES) to test the water extract metallic impurities, using field emission scanning electron microscope (SEM) Apparent powder test morphology, combined with X-ray energy dispersive spectroscopy analysis (EDS) spherical powder surface micro-analysis, the results showed that the spherical silica powder in spherical process, since most of the particles of nanoscale, nano-silica powder having a high specific surface area, and thus the adsorption of carbon dioxide gas after combustion gas effect than the fine silicon dioxide powder significantly enhanced results after water extraction of carbon dioxide dissolved in water to form carbonic acid, which is acidic aqueous extract was the main reason.

Quantum dot probes currently used for the ECL sensor is mainly concentrated in the visible region, thus resulting in high background may interfere with the detection and analysis of biological samples. With the need for bioanalytical applications, near-infrared quantum dots (NIR QDs) electric Chemiluminescence induced more and more attention.

State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University research group studied the Hanhe You mercaptopropionic acid (MPA) modified water-soluble CdTe / ECL properties of CdS small nuclear shell thick near-infrared quantum dots and nano-gold / graphene (Au -GN) and silicon dioxide (SiO2) signal amplification technology combine to develop a quantum dot-based near-infrared sensitive ECL immunosensor.

 

 

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