Electron penetration of polymers

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Update your browser to view this website correctly. Update my browser now. Plant pollen shows a wide variety of surface structures that develop during pollen sporogenesis.

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These modelled interfaces are made by combining liquid water and amorphous slabs of polyethylene and silica. However, in the presence of a free water film, the chemistry of the silica surface has a negligible influence on the behaviour of the excess electron. We conclude that the moisture content in a wet polymer nanocomposite has a profound influence on the electron trapping behaviour as it produces much lower trapping energies and a higher excess-electron mobility compared to the dry material.

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When a notched, polymeric material is stressed, the notch opens into a wide crack-tip, exposing a region of high stress concentration. Evidence is presented for electron induced crack growth at stresses below that needed for crack growth due to stress alone. The electron current densities used in these experiments are sufficiently small that thermal heating of the zone near the crack tip tends not to dominate.

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We studied three n-type polymers of the naphthalenediimide-bithiophene family as electron extraction layers EELs in hybrid perovskite solar cells. The recombination mechanism in these devices is found to be heavily influenced by the EEL transport properties. The article was received on 29 Decaccepted on 13 Jan and first published on 15 Jan

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The movement of ions penetrating into the solid causes collisions with atoms and electrons of the molecules along the ion path. As a result of these collisions, the atoms and electrons of the ion-implanted material are shifted from their equilibrium positions, leading to atomic displacements and the excitation of vibrational modes. The vibrational energy is dissipated in the material by the propagation of phonons. The collision cascades produced by the ions implanted can be considered according to the theory of particle scattering using a binary collision model to give ion penetration depths, atomic vacancy, phonon, and scattered atom and electron distributions.

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We propose a one-step nanopatterning method where liquid monomers are polymerized directly with an electron beam under an atmospheric pressure. The method allows precise positional control of an electron beam that induces electropolymerization based on an anodic oxidation only in the irradiated areas. Various versatile conjugated polymers, including polypyrrole, polyaniline and poly 3-hexylthiophenehave been directly polymerized from monomers without solvents and patterned by our one-step nanopatterning method.

The electron beam E-beam irradiation process uses high-energy electrons for a variety of applications. Electron beam irradiation processing is commonly used in the sterilization of medical devices, contamination control, as well as the modification of materials such as, heat shrink tubing and wire and cable insulation. The electron beam process can achieve widely differing effects, such as sterilization, polymer modification, cross linking and chain scission, via its action as an ionizing radiation.

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