Abstract
ZnO nanomaterial is a n-type semiconductor material and exits in a variety of one-dimensional nanostructures such as: nanorods, nanotubes, nanowalls, nanowires, ect… [3]. They have potential applications in making devices such as: light emiting diodes, optical waveguides, nanolaser, gas sensor, biosensor. Due to the high surface area to volume ratios, nontoxicity, chemical stability, biocompatibility, the high isoelectric point (IEP: 9.5), ect…; ZnO nanorods were largely used for biosensor. In this work, we developed enzyme electrode biosensor based on ZnO nanorods to test galactose solution by immobilizing galactose oxidase on ZnO nanorods grown on FTO substrate. The result showed that the proposed biosensor had the linear detection range from 40 to 230 mM galactose solution.
Highlights
ZnO nanomaterial is a n-type semiconductor isoelectric point (IEP: 9.5), ect...; ZnO nanorods material and exits in a variety of one-dimensional were largely used for biosensor
Nanostructures such as: nanorods, nanotubes, we developed enzyme electrode biosensor based nanowalls, nanowires, ect... [3]
They have on ZnO nanorods to test galactose solution by potential applications in making devices such as: immobilizing galactose oxidase on ZnO nanorods light emiting diodes, optical waveguides, grown on Fluorine-doped tin oxide (FTO) substrate
Summary
Vật liệu nano ZnO có thể tồn tại ở nhiều dạng hình thái học khác nhau như: thanh nano, ống nano, sợi nano...với những tính chất quang điện đặc trưng nên được ứng dụng trong chế tạo diod phát quang, tấm dẫn sóng quang học, laser, cảm biến. Chúng tôi chế tạo điện cực hoạt động ứng dụng trong cảm biến sinh học galactose dựa trên nền thanh nano ZnO được cố định enzyme galactose oxidase. Kết quả CV (Cyclic Voltammetry) thu được cho thấy hệ điện cực này hoạt động tốt trong dung dịch galactose oxidase nồng độ thay đổi từ 40 mM đến 230 mM với thời gian cố định enzyme là 3 giờ 30 phút. Từ khóa: nano ZnO, cảm biến sinh học, galactose oxidase, CV (Cyclic Voltammetry)
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