Cold atmospheric plasma

From basic research to practical application

What is cold atmospheric plasma?

“Plasma” is an ionized gas – the so-called fourth state of matter (the others being solid, liquid and gas) – and is generated by being energized up to 100,000 degrees or more. Natural examples for plasmas are the sun – a gigantic plasma ball – or lightning on Earth – temporary electrical discharges.

Cold atmospheric plasmas (CAP) are partially ionized gases, that means only one particle out of 1 ∙ 109 is ionized. The advantage of cold atmospheric plasmas is that they are “cold”, within the meaning that they operate under room temperature and can be produced at atmospheric pressure on Earth.

Generally, cold atmospheric plasma generates a reactive mix of electrons, ions, excited atoms and molecules, reactive species (e.g. O3, NO, NO2, etc.), UV radiation and heat. This mix inactivates bacteria, fungi, viruses, spores as well as odour molecules very efficiently.

Extensive research, employing various technologies to generate cold atmospheric plasmas, showed that the resultant mixture of electrons, ions, excited atoms and molecules, reactive species (such as O3, NO, NO2, etc.), UV radiation and heat can vary significantly for different plasma sources and that it can also be modified for specific purposes. In other words, the concentration and the composition of the plasma components can be adapted (or designed) for different intended applications.

Depending on the design of the plasma source, cold atmospheric plasma inactivates or reduces:

Bacteria, spores, fungi and viruses

Biofilms

Mites and allergens

Odours in air streams or textiles

Harmful molecules in a flow process

Therefore, terraplasma has developed a pool of different cold plasma technologies and is continuously working on further refinement and optimisation.

Cold plasma and its characteristics

Cold atmospheric plasma is characterized by diversity and flexibility. Within the range of all potential and already existing plasma sources, the following features dominate:

Safe application – our foremost priority

Process safety and health integrity for you as our valued customer and/or user of our plasma sources is guaranteed by our compliance of the five security features:

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