A5010330520- Force Microscopy Techniques and Applications
- Molecular Junctions and Nanostructures
- Nanofabrication and Lithography Techniques
- Diamond and Carbon-based Materials Research
- Semiconductor materials and devices
- Metal and Thin Film Mechanics
- Graphene research and applications
- Nanowire Synthesis and Applications
- Ionic liquids properties and applications
- Near-Field Optical Microscopy
- Electrochemical Analysis and Applications
- Surface Modification and Superhydrophobicity
- Analytical Chemistry and Sensors
- Silicon Nanostructures and Photoluminescence
- Mechanical and Optical Resonators
- Adhesion, Friction, and Surface Interactions
- Gold and Silver Nanoparticles Synthesis and Applications
- Semiconductor materials and interfaces
- Lubricants and Their Additives
- Graphene and Nanomaterials Applications
- Polymer Surface Interaction Studies
- Electrodeposition and Electroless Coatings
- Mesoporous Materials and Catalysis
- Integrated Circuits and Semiconductor Failure Analysis
- Quantum Dots Synthesis And Properties
Kyoto University
2016-2025
Dokkyo Medical University
2014-2025
Materials Science & Engineering
2006-2024
Hamamatsu University School of Medicine
2022
Graduate School USA
2004-2019
Frontier Medical College
2013
National Cancer Centre Japan
2013
Centre for Research in Engineering Surface Technology
2011
University of Tsukuba
2009
Nara Medical University
2009
Water-repellent surfaces have been prepared by exposing Si substrates with a hydroxylated surface oxide to fluoroalkyl silane (FAS) vapor. Since this chemical vapor modification (CVSM) is based on the reaction between organosilane molecules and hydroxyl groups at surface, prior CVSM, substrate was completely irradiating in air 172-nm ultraviolet light until water contact angle of became almost 0°. Under atmospheric pressure, then exposed an FAS precursor, that is, one three types having...
Micropatterning of organosilane self-assembled monolayers (SAMs) was demonstrated on the basis photolithography using an excimer lamp radiating vacuum ultraviolet light 172 nm. This lithography is generally applicable to micropatterning organic thin films including alkyl and fluoroalkyl SAMs, since its patterning mechanism involves cleavage C−C bonds in molecules subsequent decomposition molecules. In this study, SAMs were prepared Si substrates covered with native oxide by chemical vapor...
Abstract Self‐assembly of organosilane molecules at the vapour/solid interface under atmospheric pressure conditions was explored in order to form a monolayer on oxide‐covered silicon substrates. Three types precursors were employed: n ‐octadecyltrimethoxysilane (ODS: H 3 C(CH 2 ) 17 Si(OCH ), ‐(6‐aminohexyl)aminopropyltrimethoxysilane (AHAPS: N(CH 6 NH(CH and fluoroalkylsilane (FAS: heptadecafluoro‐1,1,2,2‐tetrahydro‐decyl‐1‐trimethoxysilane, F C(CF 7 (CH ). Characteristics these...
Hexagonal boron nitride (h-BN), an isoelectric analogous to graphene multilayer, can easily shear at the contact interfaces and exhibits excellent mechanical strength, higher thermal stability, resistance toward oxidation, which makes it a promising material for potential lubricant applications. However, poor dispersibility of h-BN in lube base oil has been major obstacle. Herein, powder was exfoliated into nanoplatelets (h-BNNPs), then long alkyl chains were chemically grafted, targeting...
Covalently interacted graphene–ionic liquid hybrid nanomaterials as lubricant additives significantly improve lubrication properties by reducing friction and wear.
Kelvin probe force microscopy (KFM) was applied to two-dimensional profiling of silicon pn-structures covered with a 2 nm-thick oxide layer. The surface potential contrast between the p- and n-type regions depended on hydrophobicity when KFM imaging conducted in air relative humidity more than 50%. By decreasing density hydroxyl groups layer through thermal annealing, increased. While there no detectable samples hydrophilic water contact angle almost 0°, increased greater 50 mV hydrophobic...
AimsAlthough dietary saturated fatty acids (SFA) are considered atherogenic, associations between SFAs intake and stroke coronary heart disease still debated. We sought to test the hypothesis that SFA is associated inversely with risk of its subtypes positively among Japanese, whose average lower than Westerners.
Aerogels have attracted great interest for their unique properties, but mechanical brittleness and poor functionality highly limit practical applications. Herein, we report unprecedented superelastic multifunctional aminosilane-crosslinked reduced graphene oxide (AC–rGO) aerogels that are prepared via a facile scalable strategy involving simultaneous crosslinking reducing of nanosheets with different kinds aminosilanes C–N coupling hydrolytic polycondensation reactions. It is found...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTScanning Tunneling Microscope Tip-Induced Anodization for Nanofabrication of TitaniumHiroyuki Sugimura, Tatsuya Uchida, Noboru Kitamura, and Hiroshi MasuharaCite this: J. Phys. Chem. 1994, 98, 16, 4352–4357Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue 1 April 1994https://pubs.acs.org/doi/10.1021/j100067a023https://doi.org/10.1021/j100067a023research-articleACS PublicationsRequest reuse...
A scanning tunneling microscope was employed for tip-induced anodization of titanium (Ti) surfaces. Spatial resolution fabricated patterns remarkably affected by the tip shape and humidity in atmosphere. The amount adsorbed water on Ti surface determined has a key role controlling resolution, becomes worse with increasing humidity. Under optimized conditions, successfully achieved spatial 30 nm.
ADVERTISEMENT RETURN TO ISSUEPREVNoteUltra-Water-Repellent Poly(ethylene terephthalate) SubstratesKatsuya Teshima, Hiroyuki Sugimura, Yasushi Inoue, Osamu Takai, and Atsushi TakanoView Author Information Department of Materials Processing Engineering, Graduate School Nagoya University, 464-8603, Japan, Advanced Technology Laboratory, Research & Development Center, Dai Nippon Printing Co., Ltd., Kashiwa 277-0871, Center for Nuclear Recycle, Integrated in Science Japan Cite this: Langmuir...
Coplanar nanostructures consisting of two different types organosilane monolayers have been fabricated using scanning probe microscopes (SPMs) and served as templates for the area-selective immobilization various materials. The first monolayer, which had uniformly prepared on a substrate, was locally degraded through electrochemistry adsorbed water at junction monolayer SPM probe. This probe-scanned region chemisorbed molecules second organosilane, resulting in creation self-assembled (SAM)...
Ultrafine monodisperse gold nanoparticles (AuNPs) were synthesized by an elegant sputtering of onto 1-n-butyl-3-methylimidazolium hexafluorophosphate (BMI-PF6) ionic liquid. It was found that the BMI-PF6 supramolecular aggregates loosely coordinated to and replaceable with thiol molecules. The self-assembly BMI-PF6-stabilized AuNPs a (3-mercaptopropyl)trimethoxysilane (MPS)-functionalized silicon surface in 2D arrays, followed dodecanethiol (DDT) treatment, have been demonstrated using X-ray...
Graphene oxide (GO), an oxidized form of graphene, exhibits immense potential for a wide range applications owing to its rich chemistry. This work reports the controlled deoxygenation GO under sub- and supercritical hydrothermal conditions, which are considered be foremost green, environmentally-friendly economically viable. The remarkable thermo-physical chemical properties water, monitored by temperature (373–653 K) pressure (0.04–22.75 MPa), facilitate GO. gradual structural changes in...
Two-dimensional transition-metal dichalcogenides possess inherent structural characteristics that can be harnessed for enhancement of tribological properties by making them dispersible in lube media. Here, we present a hydrothermal approach to preparing MoS2 nanosheets comprising 4–10 molecular lamellae. A structural-defect-mediated route grafting octadecylamine (ODA) on is outlined. The unsaturated d orbitals Mo at the sulfur vacancies surface are coupled with electron-rich nitrogen center...
Chemical etching of silicon assisted by graphene oxide (GO) has been attracting attention as a new method to fabricate micro- or nano-structures. GO promotes the reduction an oxidant, and holes are injected into silicon, resulting in preferential dissolution under GO. In conventional with GO, selectivity was low due stain caused nitric acid. We developed that applies negative bias p-type substrate. The more selectively etched etchant consisting hydrofluoric acid than uncovered assume this is...
Intermittent claudication is a major barrier to establishing an exercise routine in patients with peripheral artery disease (PAD). This study investigated the preconditioning effects of neuromuscular electrical stimulation (NMES) on walking capacity PAD and intermittent claudication. Additionally, it aimed determine optimal NMES settings underlying mechanisms its effects. A total 15 (Fontaine II) participated crossover study. Each patient underwent 10-min sessions at two frequencies (4 20...
Well-ordered amino-terminated self-assembled monolayers (SAMs) were reproducibly prepared on Si substrates covered with native oxide in a vapor of 12.5 vol % solution N-(6- aminohexyl)-3-aminopropyltrimethoxysilane (H2N(CH2)6NHCH2CH2CH2Si(OCH3)3,AHAPS) diluted absolute toluene. Although aggregated AHAPS molecules excessively adsorbed the deposited AHAPS-SAM films, they removed by sonication ethanol, toluene, NaOH, and HNO3 aqueous solutions, conducted that order. The thickness as estimated...
Hydrophilization of poly(methyl methacrylate) (PMMA) substrates has been demonstrated using a excimer lamp radiating vacuum ultraviolet (VUV) light 172 nm in wavelength. In this study, we have particularly focused on the effects atmospheric pressure during VUV irradiation. Each was photoirradiated with under 10, 103, or 105 Pa. Although each case hydrophobic PMMA surface became hydrophilic, water−contact angle and photooxidation rate markedly depended pressure. The sample treated at 10 Pa...
A titanium (Ti) surface was arbitrarily oxidized by a scanning tunneling microscope (STM). Oxidation of the Ti induced an STM tip with sample bias more than +3 V, and dot or line pattern oxide fabricated on spatial resolution 70 nm. The results were discussed in terms tip-induced anodization due to water adsorbed surface.