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New Processes and Applications of Plasma in Liquids

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Physical Chemistry and Chemical Physics".

Deadline for manuscript submissions: 20 October 2025 | Viewed by 1620

Special Issue Editor


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Guest Editor
Department of Chemical and Surfactants Technology, Plasma Chemistry Group (CSIC), Institute of Advanced Chemistry of Catalonia (IQAC), Barcelona, Spain
Interests: plasma agriculture; atmospheric plasmas; polymer surface functionalization; plasma in liquids; plasma treatment of biomaterials; plasma-assisted polymerization
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Special Issue Information

Dear Colleagues,

When applying plasma to a liquid, various chemical species are generated in both the gas and the liquid. In aqueous solutions, mainly electrons, ions, ultraviolet radiation, reactive oxygen species (ROS) and nitrogen species (RNS), ozone, hydrogen peroxide (H₂O₂), singlet oxygen (O), superoxides (O₂⁻), hydroxyl radicals (OH), and nitrogen oxides (NO, NO₂, and ONOO⁻) are produced. These chemical species are highly reactive, enabling various reactions and chemical processes of particular relevance in the application of plasma in agriculture, biology, or medicine, given that living organisms have a high water content in their cells and tissues. Other relevant application fields include the use of plasma for the removal of contaminants in water, the initiation of polymerization processes of monomers present in liquids, and even the promotion of hydrogel formation from polymer solutions via plasma. This Special Issue calls for original articles and reviews exploring these intriguing aspects.

Dr. Ricardo Molina
Guest Editor

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Keywords

  • plasma in liquids
  • water decontamination
  • plasma-activated water
  • hydrogels
  • plasma medicine
  • polymerization in liquids
  • plasma agriculture

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Published Papers (1 paper)

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Research

22 pages, 11015 KiB  
Article
Plasma-Functionalized Liquids for Decontamination of Viable Tissues: A Comparative Approach
by Alexander Pogoda, Yuanyuan Pan, Monika Röntgen and Sybille Hasse
Int. J. Mol. Sci. 2024, 25(19), 10791; https://doi.org/10.3390/ijms251910791 - 8 Oct 2024
Viewed by 1097
Abstract
Plasma-functionalized liquids (PFLs) are rich in chemical species, such as ozone, hydrogen peroxide, singlet oxygen, hydroxyl radical and nitrogen oxides, commonly referred to as reactive oxygen and nitrogen species (RONS). Therefore, manifold applications are being investigated for their use in medicine, agriculture, and [...] Read more.
Plasma-functionalized liquids (PFLs) are rich in chemical species, such as ozone, hydrogen peroxide, singlet oxygen, hydroxyl radical and nitrogen oxides, commonly referred to as reactive oxygen and nitrogen species (RONS). Therefore, manifold applications are being investigated for their use in medicine, agriculture, and the environment. Depending on the goal, a suitable plasma source concept for the generation of PFLs has to be determined because the plasma generation setup determines the composition of reactive species. This study investigates three PFL-generating plasma sources—two spark discharges and a flow dielectric barrier discharge (DBD) system—for their efficacy in eliminating microbial contaminants from tissue samples aiming to replace antibiotics in the rinsing process. The final goal is to use these tissues as a cell source for cell-based meat production in bioreactors and thereby completely avoid antibiotics. Initially, a physicochemical characterization was conducted to better understand the decontamination capabilities of PFLs and their potential impact on tissue viability. The results indicate that the flow DBD system demonstrated the highest antimicrobial efficacy due to its elevated reactive species output and the possibility of direct treatment of tissues while tissue integrity remained. Achieving a balance between effective large-scale decontamination and the biocompatibility of PFLs remains a critical challenge. Full article
(This article belongs to the Special Issue New Processes and Applications of Plasma in Liquids)
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