%0 Journal Article
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%3 structural effect.pdf
%X Surface modification of ultra-high molecular weight polyethylene (UHMWPE) has been explored by using the non-line-of-sight plasma immersion ion implantation (PIII) technique. The polymer specimens, immersed in nitrogen plasma, were pulsed through a metallic grid at repetition rate of 100 Hz with negative high-voltage pulse of 15 kV magnitude and 10 mus duration. The UHMWPE's structural changes induced by the PIII were analyzed by laser Raman spectroscopy (LRS) at 514.5 nm, X-ray photoelectron spectroscopy (XPS) and optical microscopy. From the Raman spectra it is observed that the chain structure of UHMWPE has been damaged due to ion bombardment and a layer of hydrogenated amorphous carbon is formed. The ratio of sp(3)/sp(2) bonded carbon in the modified layer was obtained by suitable fitting of the XPS C Is energy peak, using a four-curve fitting procedure, which recognizes a portion of C-O and C=O surface bonding. The XPS results for N Is peak show that the implanted nitrogen ions form chemical bonds with the polymer instead of forming precipitates by self-clustering.
%8 Aug.
%N 1-2
%T Structural effect of nitrogen plasma-based ion implantation on ultra-high molecular weight polyethylene
%@secondarytype PRE PI
%K PLASMA, Ultra-high molecular weight polyethylene, Plasma immersion ion implantation, Diamond-like carbon, Laser Raman analysis, XPS,  Amorphouw-carbon, Surgace modification, Films, Wear, XPS, PLASMA, Polietileno com peso molecular ultra alto, Implantação iônica por imersão em plasma, Carbono, Diamante.
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%@group
%@group LAP-INPE-MCT-BR
%@group LAP-INPE-MCT-BR
%@group LAS-INPE-MCT-BR
%@group LAS-INPE-MCT-BR
%@secondarykey INPE-11789-PRE/7148
%@copyholder SID/SCD
%@issn 0257-8972
%2 sid.inpe.br/marciana/2004/12.09.10.06.33
%@affiliation Sofia University. Department of General Physics
%@affiliation Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Plasma (INPE.LAP)
%@affiliation Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Plasma (INPE.LAP)
%@affiliation Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Materiais e Senrores (INPE.LAS)
%@affiliation Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Materiais e Senrores (INPE.LAS)
%@project Implantação Iônica por Imersão em Plasma (IIIP)
%B Surface and Coatings Technology
%P 287-290
%4 sid.inpe.br/marciana/2004/12.09.10.06
%D 2004
%V 186
%A Kostov, K. G.,
%A Ueda, Mario,
%A Tan, Ing Hwie,
%A Leite, Nelia Ferreira,
%A Beloto, Antonio Fernando,
%A Gomes, G. F.,
%@dissemination WEBSCI; PORTALCAPES.
%@area FISMAT