The Academy of Sciences of the Czech rebublic - ASCR

Prestigious award for student Tomáš Čermák: Prize of the Learned Society in the category of high school student

On May 20, 2024, the Learned Society of the Czech Republic awarded medals for merits in the development of science. The high School student Tomáš Čermák from Biskupské gymnázium in Hradec Králové was among the honorees.   


His project was realized in collaboration with doc. RNDr. Tomáš Homola, Ph.D. and Ing. Jiří Fujera from the Pulse Plasma Systems Department.


The work deals with corona discharge in alternating current under atmospheric pressure and its effect on Escherichia coli bacteria. The goal was to create a cheap and low-power disinfection device generating AC corona, which would allow the phenomenon to be studied in detail. AC corona discharge was investigated in the presence of water from the point of view of electrical properties using the Lissajous method, time- and gas-flow-dependent measurements, and electrostatic field simulations; reactions in the discharge were analyzed using FTIR and UV/Vis spectrometry, measurement of production of reactive oxygen and nitrogen species (RONS) in water and gas, and calculation of rotational and vibrational gas temperatures. The result of the work is the effectiveness of the inactivation of E. coli by AC corona and the influence of individual mechanisms (temperature, UV, RONS, etc.) on the resulting antibacterial effect.

21 May 2024