Author
T. Nishimura
Bio: T. Nishimura is an academic researcher from National Institute for Materials Science. The author has contributed to research in topics: Epoxy & Corrosion. The author has an hindex of 2, co-authored 2 publications receiving 129 citations.
Topics: Epoxy, Corrosion, Alloy steel, Dielectric spectroscopy
Papers
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TL;DR: In this article, the influence of anodization parameters on the formation of tubes, tube dimensions, formation mechanism, properties of TiO2 nanotubes (TNT), and their applications in biomedical field are reviewed.
Abstract: In this article, influence of anodization parameters on the formation of tubes, tube dimensions, formation mechanism, properties of TiO2 nanotubes (TNT), and their applications in biomedical field are reviewed. The fabrication of TNT of a different shape such as pore size, length, and wall thickness by varying anodization parameters including electrolytes, pH, voltage, electrolyte bath temperature, and current density is examined and discussed. The crystallographic nature of the nanotube obtained by various methods has also been discussed. Finally, the article concludes by examining the key properties including the corrosion aspect and various applications in biomedical field in depth.
183 citations
TL;DR: In this paper, the change in localized corrosion behavior of epoxy resin-coated low-alloy steel with varying Cr content of the steel was studied in 3% NaCl solution using localized electrochemical impedance spectroscopy (LEIS).
Abstract: In the present paper, the change in localized corrosion behavior of epoxy resin-coated low-alloy steel with varying Cr content of the steel was studied in 3% NaCl solution using localized electrochemical impedance spectroscopy (LEIS). The LEIS was operated in both frequency sweep and mapping in a single frequency mode. The characteristics of the surfaces after LEIS were observed at SEM and EDX analyses. The LEIS mapping results exhibited lower impedance values on the scratched area than that of the coated area, which signifies the higher protection of the coated surface provided by the epoxy coating. Moreover, the steel with higher Cr content has possessed excellent corrosion resistance (observed from LEIS results) due to the formation of highly stable, protective Fe- and Cr-containing duplex hydroxide (Cr2Fe(OH)2) (rust) layer on its surface. The corrosion behavior of the low-alloy steel was improved by the addition of Cr. Further, epoxy coating have provided significant support to the steel substrate against corrosion.
7 citations
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TL;DR: This review mainly highlights the wide-scale fabrication of NPs via green synthesis for biomedical and agricultural applications, and summarizes the present information regarding the biological methods which are employed to fabricate greener, safer, and environmentally sustainable nanosynthesis routes.
223 citations
TL;DR: The current treatments, novel approaches such as antibody-drug conjugation systems (ADCs), nanoparticles, nanoparticles (albumin-, metal-, lipid-, polymer-, micelle-based nanoparticles), and BCSCs-based therapies are presented.
202 citations
TL;DR: In this article, the effect of nanoparticles and 1D nanostructures on the catalytic activity of Pt/TiO2 catalysts for photo-oxidation of methanol fuel cells was investigated.
Abstract: Platinum and platinum-based electrocatalysts for the methanol oxidation reaction (MOR) are commonly used as the anode material in direct methanol fuel cells (DMFCs). Photo-oxidation promoted by ultraviolet and visible light is a promising method to increase the catalytic activity of DMFC anode electrocatalysts. Photocatalytic and electrocatalytic methanol oxidation can be coupled by addition of TiO2, a semiconductor photocatalyst, to Pt. In the presence of TiO2, an increase of the MOR activity of Pt-based electrocatalysts takes place also in dark conditions. This review deals with the methanol photo-oxidation on Pt/TiO2 catalysts, highlighting the effect of TiO2 morphology, nanoparticles, or 1D nanostructures, on the MOR activity under illumination. Comparison of reaction mechanisms in the presence and the absence of light are presented, and the roles of Pt and TiO2 during electrochemical and photochemical reactions are discussed.
124 citations
TL;DR: In this paper, the basic principles of the photocatalytic water-splitting process and the preparation and polymorphs of TiO2 nanotubes were discussed, and the combination of several methods that enable high photocurrent density with fabulous stability.
94 citations
TL;DR: In this paper, the authors highlight the corrosion resistance of the passive layers on biomedical Ti-6Al-4V and β-type Ti alloys in the human body environment by reviewing relevant literature research contributions.
Abstract: The high specific strength, good corrosion resistance, and great biocompatibility make titanium and its alloys the ideal materials for biomedical metallic implants. Ti-6Al-4V alloy is the most employed in practical biomedical applications because of the excellent combination of strength, fracture toughness, and corrosion resistance. However, recent studies have demonstrated some limits in biocompatibility due to the presence of toxic Al and V. Consequently, scientific literature has reported novel biomedical β-Ti alloys containing biocompatible β-stabilizers (such as Mo, Ta, and Zr) studying the possibility to obtain similar performances to the Ti-6Al-4V alloys. The aim of this review is to highlight the corrosion resistance of the passive layers on biomedical Ti-6Al-4V and β-type Ti alloys in the human body environment by reviewing relevant literature research contributions. The discussion is focused on all those factors that influence the performance of the passive layer at the surface of the alloy subjected to electrochemical corrosion, among which the alloy composition, the method selected to grow the oxide coating, and the physicochemical conditions of the body fluid are the most significant.
80 citations