Materials Literature
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A modified cellular automaton model with a diffuse interface has been developed in order to investigate the effects of convection on dendritic growth morphology in an undercooled melt. The present model is based on the coupling of the dendritic growth algorithm generally used in cellular automaton models and the conti…
Characterization of the Viscoelasticity and the Surface Roughness of Electrochemically Prepared Conducting Polymer Films by Impedance Measurements at Quartz Crystals , Bund, Andreas, Schneider, Mareike
Dense 8 mol % yttria-stabilized zirconia (8YSZ) ceramics consisting of submicrometer-sized grains were prepared using the spark-plasma sintering (SPS) method without any additives. The starting powder ( ca . 0.1 μm) was densified to ca . 99% of the theoretical X-ray density with shorter sintering time (5-10 min) while…
The electrochemical behavior of Ti-6Al-7Nb alloy with and without plasma-sprayed hydroxyapatite (HA) coating was investigated in Hank's balanced salt solution at 37 degrees C. This behavior was evaluated by analyzing both corrosion potential variation with time curves and potentiodynamic polarization curves. The polar…
Commercial activated carbon (AC) was improved and its performance in electric double layer (dl) capacitors was evaluated as compared to the original AC. Improvement of AC and its optimization were carried out through reactivation using a catalyst at different temperatures. After improvements, both specific capacitance…
The formation energy, structural relaxation, and defect‐induced states of neutral anion vacancies of five oxides (i.e., MgO, Al 2 O 3 , ZnO, In 2 O 3 , and SnO 2 ) and four nitrides (i.e., AlN, Si 3 N 4 , Ge 3 N 4 , and InN) are systematically discussed, based on first‐principles plane‐wave pseudopotential calculation…
Incorporation of trivalent rare earth ions and 1,10-phenanthroline into mesostructured block-copolymer/silica thin films produces spectrally pure emission from in-situ formed rare earth ion complexes.
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Description STP 1419 provides the latest global information on bearing steel manufacture and service life endurance, along with an up-to-date perspective on rolling bearing steel technologies. 34 peer-reviewed papers cover: Bearing Steel Process Developments reviews global bearing steel making technologies, including…
The research objects of this paper were to design bolaamphiphilic gelators utilizing a sugar family as a source of solvophilic groups and an azobenzene segment as a solvophobic group and to monitor the aggregation mode utilizing the spectroscopic properties of the azobenzene chromophore. The results indicated that the…
Systematic IR spectroscopic studies were undertaken to investigate the acid–base properties of Cu–Co ferrospinels Cu1−xCoxFe2O4 (x = 0 to 1) employed in phenol methylation to produce 2,6-xylenol. The IR spectra of the ferrospinels reveal that Fe3+ and Co2+ ions are mainly responsible for the various hydroxy groups on…
Composites of xerogel with polyaniline (PANI) are prepared from a vanadyl tris(isopropoxide) precursor and aniline monomer by in situ oxidative polymerization of aniline in the sol solution, followed by gelation with the inorganic oxide. The composite is characterized using Fourier transform infrared spectroscopy, X-r…
The crystallization of synthetic layered magnesium silicate hectorite clays from both silica sol and organosilane sources is compared. For the silica sol-derived clays, a templating method is employed wherein organic or polymeric molecules are included during clay crystallization that are then removed from the composi…
Editors' Foreword. Contents. 1. Introduction: Surface and Interface Science in the New Millennium 2. Fundamental Phenomena at Surfaces and Interfaces 3. New Materials via Surface Processing 4. Frontiers in the Modeling of Surface Processes 5. Surface Dynamics, Growth and Etching 6. Surface Science Tools and their Appl…
キチンやキトサンは創傷治癒促進効果を有し、抗菌活性やマクロファージを活性化させることが知られた活性分子である。我々は、各種創傷に容易に塗布ができ、短時間の紫外線(UV) 照射で不溶性のハイドロゲルを生じる光硬化性キトサン分子を調製した。そのキトサンゲルは各種創傷部を被覆し、創傷部を保護するとともに、治癒を促進することが見い出された。さらにキトサンゲルは生体接着剤として、肺創傷部からの空気漏れや動脈創部からの出血も瞬時に止めることが確認された。このように、光硬化性キトサンハイドロゲルは、新規の創傷被覆剤および生体接着剤として、特に緊急の止血と創傷被覆を要する災害時の緊急医療の場で有用な医療用素材となることが期待できる。
Thin films of various ferroelectric multimetal oxides such as (Bi 1 m x La x ) 4 Ti 3 O 12 (BLT), SrBi 2 Ta 2 O 9 (SBT) and PbZr 1 m x Ti x O 3 (PZT) have been prepared by an entirely aqueous chemical solution deposition (CSD) route. Two critical issues related with aqueous CSD have hereby been worked out: in spite of…
The slip effects of water flow in hydrophilic and hydrophobic microchannels of 1 and 2 μm depth are examined experimentally. Fabrication processes for silicon/Pyrex microchannels were chosen to ensure good control of the channel height and to obtain atomically smooth surfaces. Hydrophilic surfaces were prepared with a…
A Novel compound (Hbpy)2[[(H2O)3Ni(bpy)0.5Ni(bpy)(H2O)4]2[Mo5P2O23] [Ni((bpy)0.5)2(H2O)2][Mo5P2O23]].8H2O 1 (bpy = 4,4'-bipyridine) with an interpenetrating 2D network structure was synthesized hydrothermally and characterized by elemental analyses, IR, X-ray single crystal structure analysis and temperature-dependent…
Pressurized solid oxide fuel cell (PSOFC)/micro gas turbine generator (MTG) hybrid power systems have the potential to generate electric power at high efficiency [circa 60% (net AC/LHV)] at multi-hundred kWe and multi-MWe capacities. Thus, good fuel economy and low CO2 emissions are positive system attributes, as are…
Chlorophyll a extracted from natural Spirulina was adsorbed by mesoporous silica, FSM. The amount adsorbed depended on the pore size. Few chlorophyll molecules were adsorbed by a usual silica gel and FSMs with pore sizes of less than 2 nm. However, more than 10 wt% of chlorophyll was adsorbed by FSMs with larger pore…