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Current issue

ELEKTRO 1/2020 was released on January 20th 2020. Its digital version will be available on February 12th 2020.

Topic: Electrotechnology; Materials for electrical engineering; Wiring materia

Main Article
Using mHealth technolgy for automated data collection and transmission

SVĚTLO (Light) 6/2019 was released on December 9th 2019. Its digital version will be available on January 9th 2020.

Professional organizations activities
Light technology konference of Visegrád countries LUMEN V4 2020 – 1st announcement
23rd International conference SVĚTLO – LIGHT 2019
56th Conference of Society for development public lighting in Plzeň
What is new in CIE

Interiors lighting
Halla illuminated new Booking.com offices in Prague centre

Fish-Inspired Material Changes Color Using Nanocolumns

21.03.2019 | North Carolina State University | www.ncsu.edu

Inspired by the flashing colors of the neon tetra fish, researchers have developed a technique for changing the color of a material by manipulating the orientation of nanostructured columns in the material.

The color-changing material has four layers. A silicon substrate is coated with a polymer that has been embedded with iron oxide nanoparticles. The polymer incorporates a regular array of micron-wide pedestals, making the polymer layer resemble a LEGO® brick. The middle layer is an aqueous solution containing free-floating iron oxide nanoparticles. This solution is held in place by a transparent polymer cover.

Colour changing material

When a vertical magnetic field is applied beneath the substrate, it pulls the floating nanoparticles into columns, aligned over the pedestals. By changing the orientation of the magnetic field, researchers can change the orientation of the nanoparticle columns. Changing the angle of the columns shifts the wavelength of light that is most strongly reflected by the material; in practical terms, the material changes color.

Read more at North Carolina State University

Image Credit: North Carolina State University

-jk-