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Current issue

ELEKTRO 6/2017 was released on June 7th 2017. Its digital version will be available on June 26th 2017.

Topic: Rotating el. machines; Drives and power electronics; Frequency converters; Electromobility

Main Article
Use of programmable logic devices in electric drives
Permanent-magnet DC electric machines

SVĚTLO (Light) 3/2017 was released on June 9th 2017. Its digital version will be available on July 10th 2017.

Lightning sources
Terminology of LED lighting sources 

Daylight
The day lighting of big living rooms
Light technology assessment of linear structure

Self-healing, flexible electronic material restores functions after many breaks

16.08.2016 | PennState | news.psu.edu

Electronic materials have been a major stumbling block for the advance of flexible electronics because existing materials do not function well after breaking and healing. A new electronic material created by an international team, however, can heal all its functions automatically even after breaking multiple times. This material could improve the durability of wearable electronics.

Self-healable materials are those that, after withstanding physical deformation such as being cut in half, naturally repair themselves with little to no external influence. In the past, researchers have been able to create self-healable materials that can restore one function after breaking, but restoring a suite of functions is critical for creating effective wearable electronics.

Self-healing material

The material that the team of scientists created restores all properties needed for use as a dielectric in wearable electronics -- mechanical strength, breakdown strength to protect against surges, electrical resistivity, thermal conductivity and dielectric, or insulating, properties.

The material is able to self-heal because boron nitride nanosheets connect to one another with hydrogen bonding groups functionalized onto their surface. When two pieces are placed in close proximity, the electrostatic attraction naturally occurring between both bonding elements draws them close together. When the hydrogen bond is restored, the two pieces are “healed.”

Read more at PennState

Image Credit: PennState/Youtube

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