Atomic Force Microscopy
Mostrando 25-36 de 559 artigos, teses e dissertações.
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25. Human Embryonic Stem Cell-Derived Mesenchymal Progenitor (hESCs-MP) Growth on Nanostructured Ti6Al4V Surfaces
Nanotexturing processes that focus on enhancing the bone-implant contact, such as electropolishing, have been proposed. The aim of this work was to evaluate the influence of Ti6Al4V surface morphology on human embryonic stem cell-derived mesenchymal progenitor (hESCs-MP) growth. Three surface treatments were used in this study: mechanically polished samples
Mat. Res.. Publicado em: 30/07/2018
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26. Determinación del área de superficie real de electrodos de titanio modificado con platino por voltamperometría cíclica
ABSTRACT The surface area of Ti/TiO2-Pt electrodes (ASr) in contact with 0.010 M HClO4 solutions was determined by Cyclic Voltammetry (CV) and Atomic Force Microscopy (AFM) techniques. The Ti/Pt/TiO2 electrodes with different amounts of electrodeposited Pt (1, 5 and 10 seconds) were polarized up to 1.5 V vs. Ag/AgCl (sat. KCl) and stabilized at the final pot
Matéria (Rio J.). Publicado em: 19/07/2018
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27. Evaluation of E. coli inhibition by plain and polymer-coated silver nanoparticles
ABSTRACT Escherichia coli causes various ailments such as septicemia, enteritis, foodborne illnesses, and urinary tract infections which are of concern in the public health field due to antibiotic resistance. Silver nanoparticles (AgNP) are known for their biocompatibility and antibacterial activity, and may prove to be an alternative method of treatment, es
Rev. Inst. Med. trop. S. Paulo. Publicado em: 23/04/2018
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28. On the Effect of Aluminum on the Microstructure and Mechanical Properties of CrN Coatings deposited by HiPIMS
Hard coatings are a suitable solution for increasing the lifetime of tools and components employed in different industrial applications. Coatings of transition metal nitrides have great use for tribological applications due to due to their unique mechanical properties. Although widely employed, current deposition methods such as cathodic arc evaporation prod
Mat. Res.. Publicado em: 12/04/2018
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29. An Evaluation of the Dielectric Barrier Discharge Treatment on the Mechanical, Structural and Morphological Properties of Carbon Fibers
ABSTRACT: Carbon fibers (CFs) have been widely applied in the manufacture of polymeric composites. The mechanical properties of these composites depend on the adhesion in the matrix/CF interface. Since the CFs have poor adhesion properties, a surface treatment of the CFs becomes necessary. The plasma process used in this work was the dielectric barrier disch
J. Aerosp. Technol. Manag.. Publicado em: 29/03/2018
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30. Microstructural Evolution of a Pearlitic Steel Subjected to Thermomechanical Processing
The microstructural alterations suffered during the process of drawing deformation and subsequent annealing of pearlitic steel wires, were evaluated by scanning electron microscopy and atomic force microscopy. The deformed material showed the curling structure in cross section while, in the longitudinal section, the lamellae was aligned with the drawing dire
Mat. Res.. Publicado em: 26/02/2018
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31. Effect of Alkaline and Hot Water Treatments on the Structure and Morphology of Piassava Fibers
The effect of alcaline and hot water surface treatments of piassava Attalea funifera fibers was investigated. The efficiency of each treatment was evaluated by Fourier transform infrared spectroscopy, X-ray diffractometry, optical microscopy, scanning electron microscopy and atomic force microscopy. The alkaline treatments were effective in removing the supe
Mat. Res.. Publicado em: 01/02/2018
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32. Experimental Multi-scale analysis of Carbon/Epoxy Composites Nano-Reinforced by Carbon Nanotubes/Multi-layer Graphene
Nano-size structures, nanotubes/multi-layer graphene (CNT/MLG), were dispersed into epoxy system by a combination of sonication and high shear mixing. To avoid CNT/MLG agglomeration, a non-covalent functionalization were performed using surfactants, CO890 - Polyoxyethylene (40) nonylphenyl ether and SDBS - sodium dodecyl benzene sulfonate. Raman spectroscopy
Mat. Res.. Publicado em: 22/01/2018
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33. Analysis of Styrene Polymerization Without Surfactant and N2 Gas in Cylindrical Flask.
The conditions of chemical synthesis can be crucial for polymerization of styrene in such a way that it can be produced latex beads at nanometric range (ϕ < 400nm). In this work, it will be analyzed how the absence of N2 and surfactant will result in colloidal particles with high affinity to agglomerate forming two kinds of nanostructured assemblies: colloi
Mat. Res.. Publicado em: 22/01/2018
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34. Decellularized Bovine Articular Cartilage Matrix Reinforced by Carboxylated-SWCNT for Tissue Engineering Application
ABSTRACT Nanotubes with their unique properties have diversified mechanical and biological applications. Due to similarity of dimensions with extracellular matrix (ECM) elements, these materials are used in designing scaffolds. In this research, Carboxylated Single-Wall Carbon Nanotubes in optimization of decellularized scaffold of bovine articular cartilage
Braz. arch. biol. technol.. Publicado em: 08/01/2018
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35. A Microrheological Study of Poly(Methyl Methacrylate) Elastomer/Poly(Ethylene Terephthalate) (PMMAelast/PET) Blends
This study involved an evaluation of the influence of phase inversion in poly(methyl methacrylate) elastomer/poly(ethylene terephthalate) binary blends (PMMAelast/PET) and the effect of the addition of poly(methyl methacrylate-glycidyl methacrylate-ethyl acrylate) (MGE) interfacial compatibilizer on the microrheological properties of this polymer blend. Ther
Mat. Res.. Publicado em: 30/11/2017
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36. Surface, thermal and hemocompatible properties of novel single stage electrospun nanocomposites comprising polyurethane blended with bio oilTM
ABSTRACT In this work, the physicochemical and blood compatibility properties of prepared PU/Bio oil nanocomposites were investigated. Scanning electron microscope (SEM) studies revealed the reduction of mean fiber diameter (709 ± 211 nm) compared to the pristine PU (969 nm ± 217 nm). Fourier transform infrared spectroscopy (FTIR) analysis exposed the char
An. Acad. Bras. Ciênc.. Publicado em: 26/10/2017