Electrical properties of polyethylene modified by ion implantation and diffusion

Оджаев, В. Б.; Popok, Vladimír; Kozlova, E.I.; Jankovskij, O.; Karpovich, I. A.

doi:10.1016/s0168-583x(99)01212-4

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…Polyethylene when untreated is a representative hydrocarbon polymer with a high hydrophobicity. The modification of polyethylene by ion beam implantation [56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72] has been investigated.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms for Covalent Immobilization of Horseradish Peroxidase on Ion-Beam-Treated Polyethylene

et al. 2012

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The surface of polyethylene was modified by plasma immersion ion implantation. Structure changes including carbonization and oxidation were observed. High surface energy of the modified polyethylene was attributed to the presence of free radicals on the surface. The surface energy decay with storage time after treatment was explained by a decay of the free radical concentration while the concentration of oxygen-containing groups increased with storage time. Horseradish peroxidase was covalently attached onto the modified surface by the reaction with free radicals. Appropriate blocking agents can block this reaction. All aminoacid residues can take part in the covalent attachment process, providing a universal mechanism of attachment for all proteins. The native conformation of attached protein is retained due to hydrophilic interactions in the interface region. The enzymatic activity of covalently attached protein remained high. The long-term activity of the modified layer to attach protein is explained by stabilisation of unpaired electrons in sp2 carbon structures. A high concentration of free radicals can give multiple covalent bonds to the protein molecule and destroy the native conformation and with it the catalytic activity. The universal mechanism of protein attachment to free radicals could be extended to various methods of radiation damage of polymers.

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Section: Introductionmentioning

confidence: 99%

Mechanisms for Covalent Immobilization of Horseradish Peroxidase on Ion-Beam-Treated Polyethylene

et al. 2012

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“…Despite numerical studies of carbonization processes in polymers, the problem remains to understand better how the carbonaceous phase or carbon nanostructures formed under high-dose ion implantation could be dependent on the type of polymer matrix. In this respect, a lot of efforts have been made by researchers studying the B + -ion implantation into various polymer matrix such as polycarbonate, Kapton, polyethylene, polyamide, polyimide, poly(ethylene terephthalate), cellulose, polypropylene, polystyrene, polyethersulfone, and others ( [2,4,5,[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] and references therein). At the same time, the B + -ion implantation into widely used in practice polymer polymethylmethacrylate (PMMA) was not studied so far.…”

Section: Introductionmentioning

confidence: 99%

“…The interest to B + -ion implantation of polymers is due to formation of buried carbonaceous layer leading to increasing conductivity [20,23]. Also, B + -ion implantation into polymeric matrix results in significant increase of surface-sensitive mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Ion-Irradiation-Induced Carbon Nanostructures in Optoelectronic Polymer Materials

Kavetskyy¹,

Степанов²

2016

Radiation Effects in Materials

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The recent results obtained on the ion-irradiation-induced carbon nanostructures in optoelectronic polymer materials exemplified by boron-ion-implanted polymethylmethacrylate " PMM" with an energy of keV, ion doses from . × to . × ions/ cm , and current density < μ"/cm are reviewed. The positron annihilation spectroscopy slow positron beam spectroscopy based on Doppler broadening of positron annihilation gamma rays as a function of incident positron energy and positron annihilation lifetime at a positron energy of . keV, and temperature-dependent positron annihilation lifetime spectroscopy , optical UV-visible spectroscopy, Raman spectroscopy, electrical current voltage measurements, and nanoindentation test are chosen as the main experimental tools for the investigation of low-energy ion-induced processes in " PMM". The formation of carbon nanostructures is confirmed for the samples irradiated with higher ion fluences > ions/cm and the experimental results of the comprehensive study are found to be in a good agreement with SRIM stopping and range of ions in matter simulation results.

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Radiation Physics and Chemistry of Polymeric Materials

Singh

Kumar

2019

Radiation Effects in Polymeric Materials

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Electrical properties of polyethylene modified by ion implantation and diffusion

Cited by 7 publications

References 15 publications

Mechanisms for Covalent Immobilization of Horseradish Peroxidase on Ion-Beam-Treated Polyethylene

Mechanisms for Covalent Immobilization of Horseradish Peroxidase on Ion-Beam-Treated Polyethylene

Ion-Irradiation-Induced Carbon Nanostructures in Optoelectronic Polymer Materials

Radiation Physics and Chemistry of Polymeric Materials

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