11-Jul-2022 - Friedrich-Alexander-Universität Erlangen-Nürnberg

Nano-Rust: Smart Additive for Autonomous Temperature Control

A new, versatile method for temperature monitoring in materials

The right temperature matters – whether in technical processes, for the quality of food and medicines, or the lifetime of electronic components and batteries. For this purpose, temperature indicators record (un)desired temperature increases that can be read out later. Researchers in the group led by Prof. Dr. Karl Mandel, Professorship for Inorganic Chemistry at FAU, have succeeded in developing a novel temperature indicator in the form of a micrometer-sized particle whose central component is rust. The results of the research have been published in the journal Advanced Materials.

The new temperature indicator has decisive advantages over previous indicators: its small size means it can be flexibly applied and the fact it is made of readily available materials makes it inexpensive to manufacture. What makes it truly outstanding, however, is the modular structure of the particles made of polymers and iron oxide as well as the magnetic readout process. The modular design allows the indicator to be tailored for a specific application. The magnetic readout method allows the stored information of the temperature indicators to be read out even from the depths of a dark object or behind an opaque coating. This is not possible with many currently used indicators. It is important to note that no real-time temperature monitoring is performed as with a thermometer. Instead, the temperature indicator stores the maximum temperature ever reached in the past, ranging from 40 to 170 °C. This is particularly suitable for tracing the temperature history of a material, which cannot be tracked with ordinary thermometers without a memory unit.

  • Recording Temperature with Magnetic Supraparticles; Jakob Reichstein, Stephan Müssig, Hannes Bauer, Susanne Wintzheimer, Karl Mandel; Advanced Materials; 2022

Friedrich-Alexander-Universität Erlangen-Nürnberg

Recommend news PDF version / Print

Share on

Facts, background information, dossiers
  • temperature control
  • polymers
  • iron oxide
  • temperature
More about Friedrich-Alexander-Universität Erlangen-Nürnberg
  • News

    Green hydrogen glows pink

    Researchers at the Department of Chemistry and Pharmacy and the Chair of Thermal Process Technology at FAU have succeeded in making invisible hydrogen gas visible to the naked eye in order to prevent the risk of fires and explosions. The key to their research is what is known as suprapartic ... more

    Carbyne – an unusual form of carbon

    Which photophysical properties does carbyne have? This was the subject of research carried out by scientists at FAU, the University of Alberta, Canada, and the Ecole Polytechnique Fédérale de Lausanne in Switzerland, which has led to a greater understanding of the properties of this unusual ... more

    Attosecond camera for nanostructures

    Physicists of the Laboratory for Attosecond Physics at the Max Planck Institute of Quantum Optics and the Ludwig-Maximilians-Universität Munich in collaboration with scientists from the Friedrich-Alexander-Universität Erlangen-Nürnberg have observed a light-matter phenomenon in nano-optics, ... more