We Continue the Work of Those
Who Were the First.

  • Electrotechnics
  • Electrical Engineering
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Current issue

ELEKTRO 8-9/2019 was released on September 3rd 2019. Its digital version will be available immediately.

Topic: Electrical engineering in industry; 61th International Engineering Fair in Brno

Main Article
Residual current devices – overview and usage

SVĚTLO (Light) 5/2019 was released on September 16th 2019. Its digital version will be available immediately.

Professional organizations activities
International conference LIGHT (SVĚTLO) 2019 – 6th announcement
We participated in International commission on illumination CIE 2019 congress in Washington
Technical colloquium SLOVALUX 2019

Fairs and exhibitions
Inspire with boho styl and design of Far East at autumn fair FOR INTERIOR

New smart skin changes color using a trick learned from chameleons

11.09.2019 | National Geographic | www.nationalgeographic.com

Chameleons make changing look easy. In just a few moments, these lizards can shift the hue of their skin to intimidate predators, camouflage themselves, or find mates. Scientists have spent decades unraveling the chameleon’s color-changing secrets in the lab, and their years of work have yielded a new smart skin that changes color when exposed to the sun.

This is something nature does all the time,” says Khalid Salaita, a bioengineer at Emory University and senior author of the new paper published in ACS Nano. “And we can trigger color change using direct sunlight.” The material could be used to make everything from camouflage clothing and coatings to chemical and environmental sensors.

Smart skin inspired by chameleons

To build a color-changing smart skin in the lab, scientists have typically embedded photonic crystals in a jelly-like polymer. Yixiao Dong, first author of the new study and a doctoral student in Salaita’s lab, suggested tweaking this formula by creating a hydrogel with two layers, just like the chameleon skin. The team created a small, thin flexible structure, not unlike a silicone bracelet, that contained one layer embedded with photonic crystals of iron oxide mixed with silicon dioxide. They then exposed the skin to sunlight and light from lasers. This is unique from other previous attempts at smart skin, which are typically triggered with high voltage electric current.

Read more at National Geographic

Image Credit: Emory University