Method for preparing electrochemical nano dot array electrode by using ultra-long nanowire

Abstract

The invention relates to a method for preparing an electrochemical nano dot array electrode by using an ultra-long nanowire, and belongs to the technical field of nano electrode preparation. In orderto simply, efficiently and repeatedly prepare a nano dot array electrode, the method includes: pouring PDMS on a silicon template containing a micron groove array; pouring resin on the cured PDMS moldto obtain a resin block with a micron groove array; and depositing a layer of metal film on the resin block, performing embedding with resin, carrying out nano slicing, transferring a single resin sheet containing the nanowire array or a plurality of resin sheets containing the nanowire array alternately stacked with the hollow resin sheets to the substrate, lapping and fixing the lead on the surface of the nanowire array, adding resin for packaging, and trimming and polishing one end of the non-lapped wire to obtain the nano-dot array electrode. According to the invention, the overlapping ofthe capacitance and the diffusion layer of the adjacent electrode is avoided, and the new clean nano dot array can be obtained by re-trimming and polishing the end surface of the nanowire, so that the long-term repeated use of the nano dot array electrode is facilitated.

Description

technical field [0001] The invention belongs to the technical field of nanometer electrode preparation, and in particular relates to a method for preparing electrochemical nanometer dot array electrodes by using superlong nanowires. Background technique [0002] Nano-electrode refers to a type of electrode whose one-dimensional size is nanoscale. Compared with conventional electrodes, nano-dot electrodes have the following characteristics: the detection limit is very low, which can reach 0.1ng / mL in the measurement of trace lead in human hair; the response speed is extremely fast, and the time constant is as low as nanoseconds, which can be used to measure Fast / transient electrochemical reaction; the voltage drop of the electrode is small, which can be used for electrochemical research in high-impedance media or non-electrolyte solutions; at the same time, the one-dimensional size of the electrode is extremely small, which ensures that during the experiment, especially in th...

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Problems solved by technology

Among them, the former method has the disadvantages of complex process flow and poor size controllability, while the latter method can prepare nano-dot array electrodes with controllable size, but it also has the disadvantages of high cost of processing equipment and low processing efficiency.

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