Device and Method for Generating a Cold, Homogeneous Plasma Under Atmospheric Pressure Conditions

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This invention describes a plasma source device, referred to as a Plasma Intractor (PI), specifically designed to generate cold, homogeneous plasma at atmospheric pressure. The device employs at least six symmetrically arranged elongated electrodes embedded in an insulating body with a cylindrical cavity. An adjustable insulating capillary allows precise introduction of gases, vapors, or liquids into the plasma. The invention enables the excitation and control of reactive processes in flowing media, allowing for both primary and secondary plasma creation, which makes it especially stable, efficient, and suitable for a wide range of applications without overheating or significant contamination.

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• Surface modification of materials, including cleaning, activation, or coating for improved chemical resistance or adhesion.
• Synthesis of nanoparticles, chemical compounds, and clusters using plasma-assisted processing in reactive gases or aerosols.
• Decontamination or conversion of complex media, such as in environmental remediation or waste treatment.
• Etching or precision material removal from various surfaces in manufacturing processes.
• Internal modification or treatment of wires, fibers, tubes, or cables passed through the plasma zone.
• Functionalization and plasma-enhanced deposition of thin films on temperature-sensitive substrates, such as polymers or biological materials.

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• Produces cold plasma, suitable for treating heat-sensitive materials and biological samples without damage.
• Highly homogeneous plasma provides consistent and reproducible treatment results across a workpiece or medium.
• Minimizes metal contamination by isolating electrodes from direct plasma exposure, reducing maintenance and cleaning.
• Efficient energy usage due to optimized electrode arrangement and dielectric material, eliminating need for active cooling.
• Enables precise control over reactive processes via adjustable capillary and media flow, improving process versatility.
• Scalable design allows for arrays or matrices of devices for larger-scale or parallel processes.
• Facilitates plasma-based chemical syntheses and surface engineering applications under safe atmospheric conditions.

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Patent Abstract

The invention relates to a special plasma source designated as a plasma intractor (PI) for producing a cold, homogeneous plasma under atmospheric pressure conditions, which plasma source can be used advantageously to excite and control reactive processes in flowing media. The device according to the invention is characterized in that the device comprises at least 6 elongated electrodes (2) and a molded body (1) made of insulating material, the molded body (1) being provided with an elongated cylindrical cavity (7) and with additional holes, which are guided parallel to the cavity (7) and arranged symmetrical to the axis of the cavity and equidistant to one another, and the electrodes (2) are embedded in holes of the molded body (1) and are connected to an AC high-voltage supply in such a way that the polarities of respective adjacent electrodes are opposite in each phase of the voltage period.