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Current issue

ELEKTRO 1/2017 was released on January 18th 2017. Its digital version will be available on February 17th 2017.

 

Topic: Electrotechnology; Materials for electrical engineering; Equipment and accessories; Marking

 

Main Article

Data analysis of photovoltaic system during an eclipse

Risk of wiring of biometric identification systems

SVĚTLO (Light) 6/2016 was released on December 5th 2016. Its digital version will be available on January 5th 2017.

Interiors lighting
Colloquium Interiors 2016 – the fifth anniversary
Cooperation of indoor interior and lighting 

Standards, regulations and recommendations
New standards for road lighting

‘Sensing Skin’ Detects Cracks, Harmful Chemicals in Structures

11.10.2016 | NC State University | news.ncsu.edu

Researchers have developed a multi-layered “sensing skin” to detect corrosive or otherwise harmful substances in structures. The skin can also detect cracks and other structural flaws that are invisible to the naked eye.

The sensing skin consists of three layers, which can be painted onto the surface of a structure or pre-assembled and attached to the surface like wallpaper. The first layer is electrically conductive and is used solely to detect cracks. The second layer serves as a buffer between the first and third layers. The third layer detects cracks, but is also engineered to detect specific chemicals of interest.

Special sensing skin to detect chemicals

This third layer incorporates metal nanoparticles whose conductivity changes in the presence of specific ions. By changing the composition of the metal nanoparticles, this layer can be engineered to respond to any particular chemical.

If users want to monitor for chemicals coming out of a structure – such as leakage of the chemicals out of a containment structure – the third layer would face inward, touching the structure’s surface. To monitor external chemicals, the third layer would face outward.

Read more at NC State University

Image Credit: Julie Williams Dixon

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