Low-cost batch preparation method and application of noble metal electrode array

Abstract

The invention provides a low-cost batch preparation method and application of a noble metal electrode array. The method comprises the following steps: mixing an aqueous solution of noble metal nanoparticles with an inorganic salt aqueous solution with a certain concentration in an isopyknic manner, and aggregating the noble metal nanoparticles to increase the particle size by utilizing a salting-out effect; pouring the mixed solution into a device fixed with a templated microporous filter membrane, and carrying out rapid deposition and room-temperature sintering on the aggregated noble metal nanoparticles in a blank area of the microporous filter membrane in a reduced-pressure filtration manner to form a patterned electrode array; and finally, carrying out washing and drying treatment, soas to produce the low-cost and high-conductivity noble metal electrode array in batches. The method utilizes a template filtering method and has the characteristics of simple preparation device and process, low preparation cost, high material utilization rate and the like. The prepared electrode array is easy to modify, controllable in thickness and good in uniformity and conductivity, and has a wide application prospect in the fields of electrochemical sensors, flexible electronic devices and the like.

Description

technical field [0001] The invention belongs to the field of electronic device preparation, and in particular relates to a low-cost batch preparation method of a noble metal electrode array and its application. Background technique [0002] Chemically, noble metals are defined as metals that have excellent resistance to corrosion and oxidation even at high temperatures. Common noble metals such as gold, silver, and platinum have relatively stable chemical properties and ideal mechanical properties, so they are used in a wide range of applications, including electronics, catalysis, sensing, and biomedicine. Among them, the excellent electrical conductivity and high electrocatalytic activity of noble metals make them ideal materials for the construction of electrochemical sensors, which can be applied to NO, H 2 o 2 , glucose and other molecules can also be used to build high-performance electrochemical biosensors. [0003] Noble metal electrode arrays are the basis for con...

AI Technical Summary

Problems solved by technology

This method uses the aqueous solution of small-sized noble metal nanoparticles synthesized by conventional low-cost methods as raw materials, and induces the aggregation of noble metal nanoparticles by adding an inorganic salt solution, and realizes the size of the nanoparticles to become larger and the fusion and sintering of the particles at room temperature, thereby overcoming the initial small size. Noble metal nanoparticles of small size are easy to pass through the microporous filter membrane and do not conduct electricity. Afterwards, the one-step template filtration method is used to achieve patterned and rapid deposition of noble metal nanoparticles, thereby preparing electrode arrays in batches.

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