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International audience; Advances in plasma medicine, and particularly those concerning dermatology and microbial decontamination of biological surfaces, have recently led several laboratories to take an interest in the applications of atmospheric pressure cold plasmas to cosmetics (e.g. [1][2][3]), a field in which the use of "physical" principles (e.g. weak current, light, ultrasound, lasers) is more widespread. At the same time, there are already plasma-based systems for skin treatments on the market, many of which use thermal effect mediated by plasmas whose action, linked to local energy delivery and increase in temperature [4], is fundamentally different from that of non-equilibrium cold plasmas. In addition, the treatment using thermal plasmas, usually involve damages to healthy skin (mostly erythema and micro-burns) which should not be sought in the case of daily cosmetic treatments.Considering the above, it appeared important to discuss what could be transferred from achievements in cold plasma medicine to cosmetics, to clarify the contours of what "plasma cosmetics" can be and to appreciate what are the market needs in this sector. That also extends to decontamination and to packaging for cosmetic products as used plasma medicine sources can also serve to induce surface modifications of interest in this domain. To this end, the first meeting on Plasma Cosmetic Science (IMPCS1) was organized in Orléans, France, in November 2019. In this presentation, after recalling the general context, we will address the main themes dealt with during this meeting and we will set out the main lessons learned from the presentations and discussions concerning the future opportunities for Plasma Cosmetics.IMPCS1 was supported by Le Studium and Région Centre-Val de Loire. The authors belongs to the Plasma Cosmetic Consortium financed by the Le Studium Loire Valley Institute for Advanced StudiesReferences[1] E. Robert, G. Busco, C. Grillon and J-M Pouvesle, “Potential of low temperature atmospheric pressure plasma sources in cosmetic”, COSMINNOV 2016, Orléans, France, May 25 2016[2] K.Y. Baik “Application of atmospheric pressure plasma treated water for hair loss therapy” ISPB 2017, Jeju, Korea, June 27 2017[3] Th von Woedtke, H-S. Metelmann and K-D Weltmann, “Plasma in cosmetic applications: possibilities and boundary conditions”, ISPB 2018, Incheon, Korea, July 25 2018[4] Foster, K. W et al, “Advances in plasma skin regeneration. Journal of Cosmetic Dermatology, 7: 169-179 (2008)

This is the peer reviewed version of the following article: “Uros, C., Walsh, J., Cernák, M., Labay, C., Canal, J.M., Canal, C. (2019) White paper on the future of plasma science and technology in plastics and textiles. Plasma processes and polymers, 16 1 which has been published in final form at [doi: 10.1002/ppap.201700228]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving." This white paper considers the future of plasma science and technology related to the manufacturing and modifications of plastics and textiles, summarizing existing efforts and the current state‐of‐art for major topics related to plasma processing techniques. It draws on the frontier of plasma technologies in order to see beyond and identify the grand challenges which we face in the following 5–10 years. To progress and move the frontier forward, the paper highlights the major enabling technologies and topics related to the design of surfaces, coatings and materials with non‐equilibrium plasmas. The aim is to progress the field of plastics and textile production using advanced plasma processing as the key enabling technology which is environmentally friendly, cost efficient, and offers high‐speed processing

CuO is a versatile p-type material for energy applications capable of imparting diverse functionalities by manipulating its band-energy diagram. We present ultra-small quantum confined cupric oxide nanoparticles (CuO NPs) synthesized via a simple one-step environmentally friendly atmospheric pressure microplasma synthesis process. The proposed method, based on the use of a hybrid plasma-liquid cell, enables the synthesis of CuO NPs directly from solid metal copper in ethanol with neither surfactants nor reducing agents. CuO NPs films are then used for the first time in all-inorganic third generation solar cell devices demonstrating highly effective functionalities as blocking layer.

Based on the comparison of simulative and experimental data, an approach is presented for the design and optimization of processes assisted by low power atmospheric pressure Radio Frequency (RF) thermal plasmas. High Speed Imaging (HSI), Schlieren Imaging (SI), and temperature measurement on the surface of the substrate are performed to characterize the effect of the interaction of the RF torch effluent with a substrate placed downstream of the torch outlet. The related processes are simulated in 2-D axisymmetric and 3-D domains for different operating conditions, for the plasma generation region and for the downstream region, respectively. The comparison of numerical and experimental results is used to in depth characterize and investigate the behavior of the effluent of the RF torch.

Atmospheric pressure non-equilibrium plasma treatments of poly(vinylidene fluoride) (PVdF) solutions and electrospun Li-ion separators are implemented to improve fiber morphology and increase electrolyte uptake. Plasma pre-treatment of PVdF solutions increased the viscosity and induced a morphological change of polymer chains, enabling the production of defect-free mats with improved mechanical properties compared to those produced from non pre-treated solutions. The post-treatment of the electrospun separator induced a chemical modification of the PVdF surface and an increase of electrolyte uptake. A synergistic effect between the plasma treatments is reported: the electrolyte uptake of the pre&post-treated separators is about 1200%, ten times larger than that of commercial Celgard separators.

Successful plasma-polymerization of acrylic acid (AA), aimed at depositing plasma-polymerized polyacrylic acid (pPAA) coatings stable upon water contact with a high amount of carboxyl groups, using a non-equilibrium atmospheric pressure nanopulsed plasma jet is reported. Special attention is devoted to the surface chemical characterization of the pPAA coatings deposited on pristine and plasma pretreated polymeric substrates. The investigation of the pPAA chemical structure is performed by means of attenuated total reflectance-Fourier transform infrared and X-ray photoelectron spectroscopies. Insights on the morphological characteristics of the coatings are also provided by optical microscopy. An acrylic acid plasma polymerization process, for the deposition of plasma-polymerized polyacryilic acid coatings stable upon water contact with high amount of carboxyl groups, by means of a non-equilibrium atmospheric pressure nanopulsed plasma jet is reported. A thorough characterization of the chemical structure of the coatings, jointly to some insights on their morphological characteristics, is presented.