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Melanin system composition analyzed by XPS depth profiling
(2021-06-01)
The melanins are a class of natural pigments ubiquitous throughout the biosphere. These pigments are gaining significant attention as advanced materials due to their biocompatibility, optical and electrical properties. The ...
Estudo do biomaterial Ti-6Al-4V empregando-se técnicas eletroquímicas e XPS
(Sociedade Brasileira de Química, 2002-02-01)
The Ti-6Al-4V alloy used as biomaterial has been used over the last years. The literature shows controversies concerning the kind and the chemical composition of the film naturally and elctrochemically formed on the surface ...
Sugarcane bagasse cellulose fibres and their hydrous niobium phosphate composites: synthesis and characterization by XPS, XRD and SEM
(Springer, 2014-02-01)
Cellulose fibres obtained from sugarcane bagasse were submitted to a purification process, which consisted of an acid hydrolysis for elimination of the major part of lignin and hemicellulose. This was followed by a ...
Surface composition of PdCuAu ternary alloys: A combined LEIS and XPS study
(John Wiley & Sons Ltd, 2015-07)
PdCuAu ternary alloy samples with different composition were synthesized on top of ZrO2-modified porous stainless steel disks by the sequential electroless deposition technique. The structure, morphology and bulk composition ...
Surface, thermal, and mechanical properties of composites and nanocomposites of polyurethane/PTFE nanoparticles
(Springer, 2014-07)
Films from blends of polyurethane and nano-polytetrafluoroethylene aqueous dispersions (PU/nanoPTFE) were prepared, and the effect of the addition of different amounts of PTFE nanoparticles (50 nm) was studied. The changes ...
Estudo do biomaterial Ti-6Al-4V empregando-se técnicas eletroquímicas e XPS
(Sociedade Brasileira de Química, 2002-02-01)
The Ti-6Al-4V alloy used as biomaterial has been used over the last years. The literature shows controversies concerning the kind and the chemical composition of the film naturally and elctrochemically formed on the surface ...
XPS Analysis of Enzyme and Mediator at the Surface of a Layer-by-Layer Self-Assembled Wired Enzyme Electrode
(American Chemical Society, 2014-11)
High potential purified Trametes trogii laccase has been deposited in mono- and multilayer thin films on gold surfaces by layer-by-layer electrostatic adsorption self-assembly. The osmium bipyridil redox relay sites on ...
Influences of surface chemical composition on the mechanical properties of pulp as investigated by SEM, XPS and multivariate data analysis
(Sociedade Brasileira de Química, 2005)