Materials Literature
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Changes in microstructure of a Cu single crystal by severe plastic deformation along a crystallographically asymmetric direction were observed. Plate-like specimens with (15 12 5)[9 10 3] orientation cut from the single crystal were deformed by rolling and accumulative roll-bonding. When the logarithmic equivalent str…
難燃薬剤を注入し, 塗装した木材について, 2000時間までの促進耐候性試験, 48か月までの屋外暴露試験を行い, 暴露時間が防火性能に及ぼす影響について検討を行った。使用した薬剤は変性カルバミルポリリン酸アンモニウムを主成分とする難燃薬剤A, リン酸グアニジンを主成分とする難燃薬剤Bの2種類であった。使用した塗料は, すべて油性の, [1]含浸・半透明型塗料 (茶色系), [2]半造膜・半透明型 (茶色系), [3]造膜・隠蔽型(白色系), [4]造膜・透明型, [5]造膜・隠蔽型 (白色系) の5種類であり, このうち, [1]と[2]は下塗りから上塗りまで同じ塗料を2~3回塗り重ねるタイプ, [3]と[4]は専用のウッドシー…
福井県の海岸部，平野部，山間部の3地点にて，炭素鋼の暴露試験およびACMセンサを用いた腐食性因子の調査を実施した．平野部における炭素鋼の年間腐食速度は0.022 mm/y，月ごとの飛来海塩粒子量Sの年間平均値は8.2 mgNaCl/（m2d），ぬれ時間（TOW）は年間3900 hであった．本県の環境腐食性は，国内にて中程度であると考えられた．毎月の腐食速度は，11～1月に高く，2～7月に低くなる季節変動を示し，ACM（Fe-Ag）センサの海塩相当付着量Wsおよび日平均電気量Qdewとの間に相関関係が確認された．
We study the spin-dependent electron transport in an armchair graphene nanoribbon sample driven by both the charge and the spin biases within the tight-binding framework. By numerical calculations we give the spin-dependent currents for a fixed spin bias as a function of the charge bias. It is found that we can let on…
CaCu3Ti4O12 powders were synthesized by sonochemical-assisted process via a precursor solution of calcium nitrate trihydrate, titanium isopropoxide and copper nitrate trihydrate. The reaction process was conducted with the assistance of intense sonication using Sonics Model VCX 750 until the completely precipitated pr…
Nigeria is the fourth largest producer of cocoa pod and harvest season are often accompanied with tones of residues that are of environmental menace and in some cases hazardous. In this paper physicochemical analysis of cocoa pod was carried out and the influence of different volume fraction of the fillers in polyeste…
The electron probe microanalyzer (EPMA) has historically been the premier instrument for microanalysis, but the need to analyze progressively smaller features has driven a revolutionary change in the instrumentation. With an in-lens thermal field-emission gun and an aperture angle control lens, the FE-EPMA is now capa…
Decreases in world forest resources and high demand for wooden materials have increased the importance of paper and composite manufacturing from agricultural residues as a substitute for the use of solid woods. This study is an attempt to investigate the anatomical and chemical properties of Roselle (Hibiscussabdariff…
Achieving highly enriched single wall carbon nanotubes (SWNTs) is one of the major hurdles today because their chirality-dependent properties must be uniform and predictable for use in nanoscale electronics. Due to the unique wrapping and groove-binding mechanism, DNA has been demonstrated as a highly specific SWNT di…
Molecular imaging techniques have shown increasing potential in the definition and imaging of the structure and function of biological systems for preclinical applications. Herein, we report a high-quality dual-modal imaging platform based on water-stable gadolinium-doped Yb(OH)CO3 nanoparticles. These nanoprobes were…
This is a short summary of environmental toxicity monitoring of nanomaterials (NM) by Vicia faba GENE-TOX assay. With the rapid growth in nanotechnology, it is important to understand the safety of engineered NM and their associated hazards. NMs have unique physical and chemical properties, due to which they have been…
An electrospinning process is a multi-phase and multi-physicical process with flow, electric and magnetic fields coupled together. This paper deals with establishing a multi-phase model for numerical study and explains how to prepare for nanofibers and nanoporous materials. The model provides with a powerful tool to c…
Detonation nanodiamonds (NDs) have shown to be promising agents in several industries, ranging from electronic to biomedical applications. These NDs are characterized by small particle size ranging from 3 to 6 nm, while having a reactive surface and a stable inert core. Nanodiamonds can exhibit novel intrinsic propert…
For preparing good performance polymer materials, poly(trimethylene terephthalate)/CaCO3nanocomposites were prepared and their morphology, rheological behavior, mechanical properties, heat distortion, and crystallization behaviors were investigated by transmission electron microscopy, capillary rheometer, universal te…
著者らは，既往の研究で大気環境における鋼部材を犠牲陽極防食する方法を提案した．この方法ではAl-Zn多孔質焼結板を犠牲陽極材として，繊維シートを犠牲陽極反応に必要な水分を供給・保水するための材料として用いることとした．本研究ではAl-Zn多孔質焼結板の配合・気孔率と繊維シート特性が鋼部材の大気環境における犠牲陽極防食効果に及ぼす影響を明らかにし，本技術の大気環境に対する適用性を検討することを目的とした．そのために，Al-Zn多孔質焼結板の電気化学試験，および繊維シートの特性試験を実施した．また，鋼板，Al-Zn多孔質焼結板および繊維シートで構成したモデル試験体の大気暴露試験を行った．これらの結果に基づき，本技術の防食効果や陽極材の…
We investigate the phase organisation of thermotropic biaxial Gay-Berne (GB) mesogens yielding a biaxial nematic (Nb) phase upon endowing them with a central point dipole. We study the effects of changing the strength and orientation of the dipole on the phase behaviour, and in particular we examine, using molecular d…
Reduced graphene oxide nano-bridges and tunable electrical transport properties of reduced graphene oxide based transistors are achieved by using tip-based nanolithography. The polarity dependence of the reduction is revealed with a threshold reduction bias of −6 V on the nano-scale tip. The best carrier mobilities up…
Observation and evaluation of lattice defects such as vacancy, dislocation and grain boundary are very important for understanding microstructure development during thermo-mechanical treatments. Electrical resistivity measurements are superior to electron microscopies in terms of obtaining average information on micro…
Magnetoelectric effect has attracted considerable interest due to the promising approach towards novel spintronics device. In this work, we study the converse magnetoelectric properties of PZT/NiFe/CoFe nanocomposites in which the piezoelectric substrate is transversely polarised and the thickness of the NiFe layer is…
tion of hydrophilic polymers. Out of these three methods, dispersion of preformed polymers is a common technique used to prepare biodegradable nanoparticles. In this method, the polymer is dissolved in an organic solvent which is also used for dissolving the hydrophobic technical grade material which may be a drug or…