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The authors describe a nanosized oxygen biosensor based on grafted starch particles with encapsulated hemoglobin (GS-Hb). Transmission electron microscopy showed the GS-Hb particles to have a typical diameter of 573 nm. UV–vis absorption spectra showed that the hemoglobin in GS-Hb retains its biological activity in terms of carrying and releasing oxygen. Cyclic voltammetric studies were performed...
We report on a label-free electrochemical immunosensor for α-fetoprotein (α-FP). It is based on the use of a glassy carbon electrode that was first modified with conducting poly(5-formylindole) and single-walled carbon nanotubes (P5FIn/SWNTs), and then coated with gold nanoparticles and the respective antibody. The presence of aldehyde groups warrants direct immobilization of the antibody and results...
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