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Colloidal carbon microspheres (CMS) are dispersed in chitosan (CHIT) solution to form an organic–inorganic hybrid with excellent micro-environment for the immobilization of biomolecules. A novel amperometric biosensor for the determination of hydrogen peroxide (H 2 O 2 ) has been constructed by entrapping horseradish peroxidase (HRP) in as-synthesized CMS/CHIT hybrid. The modification...
SnO 2 hollow nanospheres have been synthesized by heat treatment of a mixture composed of SnCl 4 and carbon microspheres. The SnO 2 nanospheres are 100 nm in size and composed of large amount of SnO 2 nanocrystals with diameters of ~6 nm, which is close to two times of the Debye length of SnO 2 . It was found that the sensitivity to 1000 ppm ethanol obtained...
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