VO2(M) nanowire ordered array and preparation method thereof

Abstract

The invention discloses a VO2(M) nanowire ordered array and a preparation method thereof. According to the ordered array, a VO2(M) nanowire is arranged orderly in the wire length direction to form an array, the diameter of the VO2(M) nano wire forming the VO2(M) nanowire ordered array ranges from 200 nm to 600 nm, and the wire length ranges from 10 micrometers to 50 micrometers. The method comprises the steps that firstly, a hydrothermal method is used for obtaining the VO2(M) nanowire, then the VO2(M) nanowire is mixed with water, then ultrasonic treatment is carried out, and a VO2(M) nanowire dispersion liquid is obtained; then, the VO2(M) nanowire dispersion liquid is firstly dropwise added into chloroform, after the VO2(M) nanowire is assembled into the ordered sequence by itself on the surface of chloroform, the VO2(M) nanowire is fished out through a substrate, and the substrate coated with the VO2(M) nanowire ordered array is obtained; then after the substrate coated with the VO2(M) nanowire ordered array is placed in a vacuum or protective atmosphere for annealing, the substrate is separated, and the target product is obtained. The VO2(M) nanowire ordered array can be widely and commercially applied to the fields of photoelectric detection, intelligent responses, electro-catalysis, sensors, magnetic devices and the like easily.

Description

technical field [0001] The invention relates to an ordered array and a preparation method, especially a VO 2 (M) (M-phase vanadium dioxide) nanowire ordered array and preparation method thereof. Background technique [0002] Vanadium dioxide is a Mott phase change material. When conditions such as temperature or pressure change, it will change from an insulator phase or a semiconductor phase to a metal phase. At the same time, its resistivity, optical refractive index, magnetic susceptibility, reflectivity, etc. subject to change. Vanadium dioxide crystals have different phases, such as VO 2 (A), VO 2 (B), VO 2 (C), VO 2 (D), VO 2 (M) and VO 2 (R) etc., among them, VO 2 The phase transition temperature of (M) is closest to room temperature (68°C). At present, in terms of vanadium dioxide photodetection, although a single vanadium dioxide nanowire reported in the literature has relatively excellent photodetection performance, it is difficult to obtain practical appli...

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Problems solved by technology

But, no matter be product, or its preparation method, all exist weak point, at first, VO 2 (B) Does not have phase transition characteristics, and its application prospects are difficult to match with VO whose phase transition temperature is close to room temperature 2 (M) on the same level; secondly, the length of the nanowires basically does not exceed 5 μm, and they are only arranged along a certain direction in a small range, and the nanowires under the overall 5 μm scale are still randomly distributed. sequence state; again, in the process of preparing the product, a variety of surface modifiers and active agents are used, and these surface modifiers and active agents remaining on the product will inevitably have an adverse effect on the actual application of the product; finally, the preparation method Neither can get VO 2 (M) The ordered array of nanowires also has the defects of cumbersome process and high cost

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