Working electrode for cylindrical array cross-scale glucose sensor and preparation method of working electrode

A glucose sensor and working electrode technology, which is applied in the field of micro-sensing, can solve the problems that do not involve the cylindrical array structure, achieve excellent physical and chemical properties, improve the adsorption effect, and improve the detection sensitivity

Inactive Publication Date: 2013-10-09
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] The working electrodes for cross-scale glucose sensors mentioned in the above studies do not involve cylindrical array structures

Method used

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  • Working electrode for cylindrical array cross-scale glucose sensor and preparation method of working electrode
  • Working electrode for cylindrical array cross-scale glucose sensor and preparation method of working electrode

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Embodiment Construction

[0035] Below in conjunction with accompanying drawing and embodiment case, the present invention is described in further detail:

[0036] see figure 1 , 2, the present invention comprises that the length is 30mm, the width is 30mm, the thickness is 1.5mm glass substrate 1 and one end is fixed on the glass substrate 1 with silver powder conductive glue 2, and the other end is suspended 20mm outside the edge of glass substrate 1 by the optical fiber core An optical fiber array composed of 3, the length of the optical fiber core 3 is 40 mm, and the diameter is φ125 μm. Au film 4 with a thickness of 300 nm is deposited on the optical fiber core 3, and ZnO nanowires 5 are grown on the Au film. The ZnO nanowires 5 described above have a regular hexagonal structure and are grown on the Au film 4 by the water bath method. GOD6 with an activity of 40U / mg.

[0037] see figure 1 , 2, the preparation method of the present invention comprises the following steps:

[0038]1) Take a mult...

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Abstract

The invention relates to a working electrode for a cylindrical array cross-scale glucose sensor and a preparation method of the working electrode. A covering of a common multi-mode optical fiber is removed, an optical fiber core is pulled out, and an Au (gold) membrane is deposited on the surface of the optical fiber core on the basis of a magnetic control sputtering technique; a plurality of optical fiber cores which are deposited with the Au membrane are closely arranged on a glass substrate and fixed by silver powder conductive glue to form an electrode substrate with the micrometer-scale cylindrical array structure; a ZnO (zinc oxide) nano wire is grown on an optical fiber core array which is deposited with the Au membrane based on a water bath method to form a nano-scale surface in a cylindrical array cross-scale structure and to be used for increasing the adsorption area of GOD, so that the catalytic efficiency of the working electrode for the cross-scale glucose sensor based on a tri-electrode system can be greatly improved.

Description

technical field [0001] The invention belongs to the field of micro-sensing technology, and is mainly used in the fields of electrochemistry, biology, medicine, food processing, environmental monitoring, etc., and particularly relates to a cylindrical array cross-scale glucose sensor for detecting glucose concentration in human blood and urine Working electrode and its preparation method. Background technique [0002] In the fields of electrochemistry, biology, medicine, food processing, environmental monitoring and other fields, the accurate, fast and online measurement of glucose concentration plays a very important role. At present, the enzyme-catalyzed glucose sensor based on the three-electrode system is receiving more and more attention. Its core is mainly the working electrode, including GOD, the matrix material for fixing GOD and the base electrode; the measurement method used is chronoamperometry or potentiometric method. . ZnO nanowires have the advantages of larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/327
Inventor 景蔚萱陈路加王兵周帆蒋庄德牛玲玲齐含苑国英
Owner XI AN JIAOTONG UNIV
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