Surface charging by the cold plasma discharge of lentil and pepper seeds in comparison with polymers

• Published in: Colloids and surfaces, B, Biointerfaces B, Biointerfaces, 2018-12, Vol.172, p.541-544
• Main Authors: Shapira, Yekaterina, Chaniel, Gilad, Bormashenko, Edward
• Format: Article
• Language: English
• Subjects: Capsicum - drug effects; Capsicum - ultrastructure; Electrical charging; Electricity; Lens Plant - drug effects; Lens Plant - ultrastructure; Organic surfaces; Plasma Gases - pharmacology; Polymers - pharmacology; Polymethyl Methacrylate - pharmacology; Radiofrequency plasma; Seeds; Seeds - drug effects; Seeds - ultrastructure; Surface charge leakage; Surface Properties; Time Factors
• ISSN: 0927-7765; 1873-4367
• DOI: 10.1016/j.colsurfb.2018.09.004

[Display omitted] •Surface charge density supplied by cold plasma to the pepper and lentil seeds and polymers was established.•The surface charge density for the majority of studied interfaces was estimated as ≈(0.75-3.7)μCm2.•The kinetics of the surface charge leakage was studied.•The values of leakage time established for seeds were markedly larger than those for polymers. Cold plasma treatment charges organic surfaces. Surface density of the electrical charge supplied by cold radiofrequency plasma to the pepper and lentil seeds and various polymers: polyethylene, polystyrene, polycarbonate and poly(methyl methacrylate) was established experimentally. The surface charge density for all of studied interfaces, with one exception of polycarbonate was estimated as σ≈0.75-3.7μC/m2; for the polycarbonate it was almost an order of magnitude larger, namely σ≈7-9μC/m2. The kinetics of the surface charge leakage was studied. The characteristic time of temporal change in the surface density of the electrical charge gained by the seeds is markedly larger than that of synthetic polymers.