Materials Literature
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用直流碳弧法，在氩气氛下烧制碳包覆镍纳米微粒。使用矢量网络分析仪AV3618测得碳包覆镍纳米微粒在1~18 GHz的电磁参数，分析材料电磁性能。结果显示，由于碳包覆镍纳米微粒的碳层与镍核的特殊结构，使得阻抗匹配良好，而测试的磁导率参数表明，碳包覆镍纳米微粒复合材料在5~10 GHz和13 GHz存在损耗峰，这可能是由纳米颗粒表面各向异性，表面能的增加导致的自然共振引起的。模拟测试表明2 mm厚碳包覆镍纳米微粒复合材料在13 Ghz时的微波吸收效果可以达到−30 dB，当厚度增加到3和4 mm厚时，峰值增加到−63 dB，但是对应频段却向低频转移，分别为5.2和8.2 GHz。模拟计算显示，碳包覆镍纳米微粒复合材料具有很好的微波吸收…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text M. P. Pileni, "Modulating the Physical Properties of nanocrystals and supracrystals through atoms and nanocrystals assembling: New Challenges," in JSAP…
Hybrid solar cells employing polymer and PbSxSe1-x nanocrystals have been demonstrated with a record high power conversion efficiency of 5.50% and a large fill factor of 67%, benefiting from the self-assembled vertical phase segregation structure.
Исследовано влияние внешнего магнитного поля напряженностью до Н=14 Тл на фазовые переходы в монокристаллах MnAs, MnAs0.99P0.01 и MnAs0.98P0.02. Показано существование структурной нестабильности кристаллической решетки, связанной с аномальным сжатием в интервале температур от Tf1 250 К до температуры фазового перехода…
Room-temperature ionic liquids (RTILs) constitute a new class of liquids that attract much attention because of their characteristic properties and potential utilities as functional liquids. Unique properties are remarkably manifested in their thermal behaviors such as low melting point despite being salts, hardness i…
Scaffolds for cardiac tissue engineering must be designed to achieve adequate degradation kinetics and mechanical properties. In this study, bulk modification of poly(glycerol sebacate) (PGS) with different concentrations of thermal proteins (TP) was investigated to tailor the degradation properties of PGS. TP are pol…
Meat tenderness is known to be affected by sarcomere length (SL), proteolysis and collagen content (CC). 60 lambs were slaughtered and the 'Longissimus' muscle was sampled. Shear force (SF), SL, proteolysis (desmin, PSA) and CC samples were taken after the allotted aging periods (1, 7, and 14 days). Proteolysis explai…
The thermal boundary conductance between the highly ordered pyrolytic graphite (HOPG) and aluminum, nickel and cobalt metal thin films has been measured at room temperature. The work aims to gain fundamental understanding into the thermal boundary conductance through the metal/graphite layer interface, which is essent…
はっ水／はつ油性といった濡れに関する研究分野は，これまで主として静的接触角の値を大きくし，液滴と固体表面の接触面積を小さくすることに研究の焦点が絞られてきた。これに対し，最近，液滴の固体表面からの除去性能の指標として，動的接触角（前進接触角と後退接触角）および接触角ヒステリシス（前進接触角と後退接触角の差）制御の重要性が指摘されている。たとえ接触角の値が小さくても，接触角ヒステリシスを制御すれば，環境負荷の大きい有機フッ素化合物を使用することなく“汎用元素”だけで優れた滑液性（とくに低表面エネルギー液体）を実現することができる。本稿では，はつ油／超はつ油処理を中心に最新の研究動向をレビューしながら，優れた滑液性を得るための表面デザ…
Organic nonlinear optical single crystals of 4 -methoxy benzoin were grown by slow evaporation technique. The X -ray diffraction analysis reveale d that 4methoxy benzoin single crystals belong to orthorhombic crystal system with a space group Pca2 1.Optical absorption range of the grown crystal was measured by UV -VIS…
The aim of this research is to find the relationship between morphology, thermal and mechanical properties, and gas permeation property of poly(lactic acid) (PLA)/natural rubber (NR) films and film blowing conditions, such as take-up ratio (TUR) and blow-up ratio (BUR). The effect of uniaxial drawing at elevated tempe…
p-type AlN crystals by C and Si codoping were grown on SiC substrates by the sublimation method.The structural,optical and electronic properties of the samples were investigated by XRD,XPS,PL and Hall-effect measurement.The XPS analysis,especially about binding energies of Si 2p and C 1s peaks,reveals that in AlN crys…
埼玉県南部地域に住む成人8名の個人外部被ばく線量について電子ポケット線量計を用いて調べた結果，1.43～1.88μSv/日であり，個人によって約30％違いが見られた。年間線量に換算すると0.52～0.69mSv/年であり，日本人の自然放射線による年間外部被ばく線量0.63mSv/年に比べると同程度か，やや低い値であった。また，福島原発事故以前の値と比較すると，最大0.069mSv/年増加したが，公衆の平常時の被ばく線量限度1mSv/年の約7％であった。
RESUMO. A dinâmica do modelo fermionico de um unico sitio auto-interagente na presenca de um campo magnetico pode ser obtida de forma exata e algebrica. Diversos sais orgânicos possuem a parte eletronica descrita por modelos fermionicos com pouquissimos graus de liberdade. Nesse trabalho, escrevemos a representacao ma…
一传导性在 situ 的聚合合成包含极其细小的金属粒子被准备由融化相配。弹性体的 nano 粒子和碳 nanotubes 的加入妨碍金属粒子联合并且在金属粒子的决裂 / 结合平衡引起移动到决裂方向。主要金属粒子(大约 26 m ) 在 situ 被变换成极其细小的金属粒子(UFMP，大约 932 nm ) 。碳 nanotubes 的网络被改进了由于在 situ 极其细小的金属粒子和过滤阀值与 1.96 vol% UFMP 合成仅仅是 0.25 vol% 碳 nanotubes。
We report on continuously measured 222Rn activity concentrations in near-surface air at Neumayer Station in the period 1995-2011. This 17-year record showed no long-term trend and has overall mean ± standard deviation of (0.019 ± 0.012) Bq/m**3. A distinct and persistent seasonality could be distinguished with maximum…
Методами ЯМР 19F, 23Na и импедансной спектроскопии исследованы ионная подвижность и электрофизические свойства твердого раствора 50PbF2 · 30BiF3 · 20NaF с флюоритовой структурой. Анализ спектров ЯМР позволил проследить за характером движений ионов во фторидной и натриевой подрешетках при вариациях температуры, определ…
The electric double layer gating technique using ionic liquids which allows to increase the capability of usual field effect doping by two order of magnitude opens a new avenue not only to novel physics of solid-state materials but also to potential applications for dissipationless devices. Here we report high-perform…
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Features observed during reanodizing in 0.1 M ammonium pentaborate electrolyte through the preformed barrier film formed in molten eutectic mixture of NaHSO4:NH4HSO4 (1:1 mol), as a mobile tracer, results from the operation of several factors, such as film density, current density, and field strength. When the density…