Preparation method of variable resistance sensor based on graphene/up-conversion luminescent nanocrystal composite material

Abstract

The invention discloses a preparation method of a variable resistance sensor based on graphene / up-conversion luminescent nanocrystal composite materials. The method comprises the following steps of: S1, a selection of raw materials, selecting matrix materials, reagents, rare earth ions, and nitrogen as needed; S2, a preparation of a composite material, treating the raw materials in the S1 by usingan in-situ hydrothermal method and reducing the raw materials in N<2> to obtain RGO-NaYF<4>: Yb<3+> / Er<3+> graphene composite conductive material; S3, a selection of the matrix materials, putting themiddle part of an ITO conductive film in an etching solution for etching to form an open circuit; S4, a drop casting, dissolving the graphene composite conductive material obtained in the S2 in N-methyl pyrrolidone, dropping into the substrate in the S3, and drying; and S5, an extraction of an electrode, extracting a copper wire from two ends of the ITO glass substrate in the S4 to serve as electrodes to prepare a variable resistance sensor device. The preparation method is simple and convenient, high in stability, and suitable for industrial batch production.

Description

technical field [0001] The invention relates to a preparation method of a variable resistance sensor based on a graphene / up-conversion luminescent nanocrystal composite material, which can be used in the technical field of rare earth luminescent materials. Background technique [0002] The common method of measuring resistance in daily life is through direct or indirect measurement, such as voltammetry, ohmmeter method and bridge method, etc., which are usually easy to measure for fixed resistance. However, it is difficult to detect resistance through high-frequency changes of electronic equipment in a short period of time, which exceeds the response time of some instruments. In some special fields, such as high voltage, internal resistance of microelectronic devices, etc., it is not convenient to use traditional Therefore, it is necessary to explore a new method independent of the responsiveness of the instrument to detect variable resistance in a short time. [0003] In r...

AI Technical Summary

Problems solved by technology

However, resistance parameters are seldom characterized by other parameters, especially optical parameters are used to calibrate variable resistors, and the characteristics of rapid response, non-contact and dynamic movement of optical properties are used to combine resistance detection with optical properties. is rare

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