A tio with photonic crystal properties 2 Preparation method of nanoparticles

Abstract

The invention discloses a preparation method of TiO2 nanoparticles with photonic crystal characteristics. The preparation method comprises the following steps: preparing a precursor solution by mixing TiCl4 solution, absolute ethyl alcohol and deionized water; and with butterfly wings as a bio-template, treating the template by a solution impregnation method and removing the template at a high temperature to obtain the TiO2 nanoparticles. The preparation method disclosed by the invention has the advantages of simple technology, easily available raw materials, good product structure and performance and the like; and the prepared TiO2 nanoparticles with photonic crystal characteristics have a good application prospect in the field of thin-film solar cell study.

Description

1. Technical field [0001] The present invention relates to a kind of preparation method of photonic crystal, specifically a kind of TiO with photonic crystal characteristic 2 The invention relates to a method for preparing nanoparticles, which belongs to the technical field of semiconductor materials and devices. 2. Background technology [0002] In nature, some substances can be regarded as natural photonic crystals because of their periodic arrangement structure. Such as butterfly wings, opals, beetle shells and more. The reason why these natural photonic crystals have colorful colors under the irradiation of natural light is that their unique periodic structure will reflect different wavelength bands of light incident at different angles. Among them, the butterfly wing belongs to the two-dimensional photonic crystal structure because of its periodic structure in the plane direction. In terms of current technology, the colloidal crystal self-assembly method and the inve...

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Problems solved by technology

Iwase E. etc. used photolithography technology to engrave a diffraction lattice similar to the scale structure of butterfly wings on the surface of silicon wafers, but the level of technology is limited, and the fineness of the obtained microstructure cannot be compared with that of natural butterflies; Cook G. et al. Peacock butterfly (Peacockbutterfly) scales were used as a template, and SiO was prepared by chemical vapor deposition (CVD). 2 Due to the difficulty in controlling the hydrolysis rate of silane in butterfly wing relic materials, SiO has been formed before it penetrates into the internal structure of the scales. 2 layer, and its structure cannot be accurately replicated; Silver J. et al. used the scale structure of Morpho Pleides with a photonic crystal-like structure as a template to prepare TiO by sol-gel method 2 photonic crystal material, but since TiO 2 The hydrolysis rate of the precursor cannot be well controlled, and the details of the hierarchical structure of the final copied butterfly wing are fuzzy, and only the micron-sized structural features of the wing ridges and wing ribs can be retained; Huang J.Y. et al. The microstructure of Peleides was covered layer by layer more accurately, and butterfly wing structure materials with different thicknesses were obtained

But since Al 2 o 3 The refractive index of chitin is basically the same as that of chitin, and the final reflection line does not change much

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