Review on recent advances in cold plasma technology

Abstract

This paper reviews the technological advancements of cold atmospheric pressure plasma technology (CAPPT) in various fields that include-medicine, agriculture and industry. In the recent years, cold plasma technology has received considerable interest due to its inherent benefits that include- free radicals for inactivation of microbes, eco-friendliness, cheap operational cost, simplicity of operation and portability of devices. Various working gases (nitrogen, argon, and helium ) and various mechanisms (dielectric barrier discharge, corona discharge, floating electrodes) have been implemented for generating cold plasma at room temperature. Cold atmospheric pressure plasma technology (CAPPT) has been employed in material science for augmenting surface properties such as (adhesion,wettablility,chemical composition) of numerous materials that include-(metals,polymers,textiles). CAPPT technology is an established technology used to inactivate various microbes (viruses,bacteria,fungi) and further subsequently utilized in food preservation as well as shelf-life extension of fruits and vegetables. Cold plasma technology also has played a pivotal role in agricultural sector wherein it has shown great promise of enhancing agricultural produce through disinfection of seeds and food powders, germination of seeds etc. CAPPT technology has played a major role in plasma medicine, CAPPT treatment techniques have been employed in dentistry (tooth bleaching), dermatology (skin treatment) etc. Overall CAPPT technology is an efficient and potent tool offering both technological and biomedical applications.

Metrology of Ar–N2/O2 Mixture Atmospheric Pressure Pulsed DC Jet Plasma and its Application in Bio-Decontamination

“…Moreover, the bio-relevant targets which are used in treatment are quite complex due to various unmeasured and mysterious variables. − However, atmospheric pressure plasma comprises of reactive nitrogen and oxygen species (RNOS), having gas temperature close to ambient temperature, and is suitable for biomedical applications. − In addition to RNOS, UV radiation and transient electric fields are also likely important in plasma-based disinfection. − Tuning of these parameters at ambient temperature is always a challenge due to high electron neutral collision rates. Numerous atmospheric pressure devices have been developed to generate the room temperature plasma for medical and industrial applications. − Investigation on plasma devices emphasizing on biomedical applications has shown that plasma devices can be economical and convenient . In these devices, discharge parameters influence the biological sample, which can be controlled via plasma parameters like input power, treatment time, treatment distance, feed gas composition, and mode of operation …”

“…Numerous atmospheric pressure devices have been developed to generate the room temperature plasma for medical and industrial applications. 48 − 53 Investigation on plasma devices emphasizing on biomedical applications has shown that plasma devices can be economical and convenient. 54 In these devices, discharge parameters influence the biological sample, which can be controlled via plasma parameters like input power, treatment time, treatment distance, feed gas composition, and mode of operation.…”

Generation of atmospheric pressure air diffuse discharge plasma in oxygen enriched working gas with floating electrode

“…In recent years, the FE structure has been used to stabilize the discharge plasma and increase the length of the plasma feather, so as to improve the performance of the plasma source. Deepak et al show that the ring or helix FE is beneficial to restrict the transition of glow to arc and effectively increase the length of the plasma jet [25,26]. A plasma reactor with a plate FE, which has a solid metal top half and a metallic foam bottom half, designed by Zhu et al, increases the volume of plasma light-emitting area and improves the efficiency of hydrogen production [27].…”

On the gas heating effect of helium atmospheric pressure plasma jet

“…Cold atmospheric pressure plasma jets (CAPPJs) have been successfully employed for treatment of a large sort of materials and in plasma medicine over the last two decades [1][2][3][4][5][6]. When applied on non-biological substrates the CAPPJs have both chemical and physical action on the treated surfaces by creating/removing functional groups and changing the surface roughness [7][8][9][10].…”