Nov
17
2017

Light structure makes the water free to change with the change of the environment vy canis majoris

"Light structure" to let the water change with the environment free color – technology – people.com.cn original title: "the light structure" to let the water change with the environment free color technology daily September 8 Tokyo Xinhua (reporter Chen Chao) combined with a small group of Japanese Institute of physical chemistry, University of Tokyo and material Research Institute has recently developed a new dynamic the optical structure, through the trace of titania nanosheets on water containing hundreds of nanometer arranged cycle regular, make water without changing the component under the condition of instantaneous change color according to the change of the environment. "Light structure" refers to the material with the same wavelength as the visible light structure, and according to the length of the cycle to selectively reflect the corresponding wavelength of light, thus showing a variety of bright "structural color". Scientists have done a lot of research on "light structure", which is very useful for the extraction, isolation and propagation of light. However, it is not easy to obtain the optical structure, even if it is difficult to make use of the latest nano technology, so the usual light structure is composed of inorganic crystals and organic polymers and other hard materials. In nature, some creatures can skillfully use liquid substance "dynamic light structure, such as glass and neon damselfish fish and other fish, they can freely control the color. It is extremely difficult to produce a "dynamic light structure" by means of artificial materials that can change the color of the material in a timely manner according to the change of the environment. Japanese researchers use the titania nanosheets "light development structure". Titania nanosheets with thickness of 0.75 nm, banner for several micrometers, with two-dimensional inorganic substances great axial ratio, with a high refractive index and magnetic field orientation and other unique properties. The nanosheets with a large negative charge, each other has strong static electric repulsion, can let the nanosheets form layered periodic structure with a certain interval in water dispersion. But the maximum spacing of 50 nm, it is difficult to use as a "light structure". Therefore, the research team developed a new method to expand the nanosheets interval, the trace of titania nanosheets dispersed in water to hundreds of nanometers for a regular cycle arrangement, success of the liquidity structure of light with the environmental changes of instantaneous structural color "". The results are of guiding significance to the development of colloid science, bottom-up nanotechnology and metamaterials. Research papers published online in the journal Nature communications. (commissioning editor Wei Yan and Zhao Zhuqing)相关的主题文章:

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