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Current issue

ELEKTRO 7/2017 was released on June 26th 2017. Its digital version will be available on July 28th 2017.

Topic: Cables, conductors and cable technique; Connectors; Software; Marking and labelling

Main Article
Electrical insulation and thermal conductivity

SVĚTLO (Light) 4/2017 was released on August 8th 2017. Its digital version will be available on September 8th 2017.

Optical radiation effects and use
Glow-worm in a light engineer eyesight

Lighting installations
OSRAM TecDay Czech Republic 2017
Workroom illumination of Dominican provincial in Prague
innogy – reconstruction of company administrative centre

‘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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