Materials Literature
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Compounds with a high dielectric constant (high-k compounds) offer fast response times and low threshold voltages, and achieve a hysteresis-free LC device, thereby overcoming a image sticking issue.
We report on free-standing NiTi alloy nanowires (120 nm × 75 nm) fabricated using a technique referred to as "nanoskiving", which complements conventional thin film sputter deposition with ultramicrotomy for thin sectioning. To date, the technique has been limited to pure metals without exploring metallic alloys. Leve…
A facile way to obtain well-defined hydroxyl-end and amide-core stereoregular star polylactide.
Paclitaxel (Ptx) has been established as one of the most important components of first line chemotherapy regimen in the treatment of lung cancer. However, the poor solubility of Ptx makes it employ Cremophor as a solvent, which greatly limits its application due to the severe adverse effect. Encapsulation of Ptx into…
O2·-和H2O2是TiO2光催化反应过程中产生的重要活性氧物种. 本文使用鲁米诺作为化学发光探针, 针对两者寿命不同, 建立了连续流动化学发光在线定量检测方法. 对于O2·-, 由于寿命短, 标准品不易得到, 将光照后TiO2样品10 s内与鲁米诺混合产生化学发光, 根据鲁米诺和O2·-化学计量关系, 将该发光强度对应的鲁米诺浓度转换成O2·-的浓度, 实现间接定量; 对于H2O2, 将光照后的TiO2溶液于黑暗处30 min后进行定量. 该方法测得TiO2光催化产生O2·-和H2O2的浓度范围分别为7.5~30 nmol/L和0.60~3.0 μmol/L, 检测限分别为1.95 nmol/L和18.0 nmol/L. O2·…
The significance of light-weight construction in the automotive industry continues to increase. The reasons for this lie, for example, in the reduction of CO2 emissions achieved by fuel savings due to reductions in automobile weight. Low vehicle weights can be achieved through material substitution or improved topolog…
围单人赛的碳 nanotubes (SWNT ) 拥有高电导率，机械力量，透明性，和灵活性，并且对在灵活电子学，透明电极，和精力存储和收获精力的应用的使用因此合适。然而，利用这些性质， SWNT 一定在许可证处理和使用的一个表面活化剂答案是绑 de 的。我们报导一个新方法用重氮基的染料 3,3- 准备一部基于 SWNT 的透明进行电影(TCF )([1,1 联本基]-4,4-diyl)bis(4-amino naphthalene-1-sulfonic 酸) ，通常作为刚果红(CR ) 知道，，分散剂。一致 20-nm-thick TCF 在僵硬玻璃和灵活聚乙烯 terephthalate (宠物) 底层上被准备。CR-SWNT…
In weakly ferromagnetic materials, already small changes in the atomic configuration triggered by temperature or chemistry can alter the magnetic interactions responsible for the non-random atomic-spin orientation. Different magnetic states, in turn, can give rise to substantially different macroscopic properties. A c…
摘要： 锡界面层(或称镀锡层)在钢套(低碳钢)与内衬(巴氏合金)结合性方面起着至关重要的作用，最佳的锡界面层厚度可以使得钢套与内衬界面获得最佳的结合强度。考虑锡界面层厚度的影响因素，设计多因素水平的正交试验，得到锡界面层厚度关于表面粗糙度、镀锡温度、镀锡时间、镀锡次数等的函数关系式；运用分子动力学对钢套与内衬的界面结合能进行模拟分析，得到界面结合能关于锡层比例(锡层与巴氏合金层比例的简称)的函数方程，再根据实际轴瓦尺寸及锡界面层厚度关系式确定锡界面层最佳厚度与工艺控制参数；试验与模拟结果表明，锡界面层厚度为40 μm时，其界面结合性能最好，界面结合强度最大，模拟结果与试验相符。锡界面层厚度关系式可直接适用于油膜轴承系列化产品的制造…
The Aim of the present work was to study the effect of polymer and surfactant concentration on characteristics of nanoparticle formulations. Nanoparticles were prepared by solvent evaporation method. The prepared nanoparticles were characterized by particle size, entrapment efficiency, drug loading. Compatibility stud…
The purpose of this study was achieving an optimum formulation with low initial burst and steady-state release of insulin from the nanoparticles prepared with different blends of poly(lactide-co-glycolide) (PLGA), polylactic acid (PLA), poly(e-caprolactone) (PCL) and Eudragit® RS100 polymers. Insulin was encapsulated…
This study investigates the fate and the effects of silver nanoparticles (AgNPs) in rainbow trout (Oncorhynchus mykiss). Juveniles were exposed to 50 g/L of AgNPs 20 nm and 1 g/L of dissolved silver Ag + (as AgNO 3 ) in three types of water differing in conductivity, pH and organic matter: green water (Saint-Lawrence…
Carbon fibers represent a very interesting material for field electron emitters. While the preparation of sharp carbon fiber tips is very similar to the conventional method used for tungsten tips, much smaller apex radii can be obtained. Within the study presented here, such emitters have been prepared and tested usin…
Novel conducting copolymers of N -methylaniline (NMAn) and o -aminophenol ( o -APh) were synthesized electrochemically with different feed ratios of the monomers in sulfuric acid solution. The obtained homopolymers and copolymers were characterized with cyclic voltammetry, scanning electron microscopy (SEM), in situ c…
The aim of this study was to evaluate bioactivity of chitosan film with incorporated caraway essential oil by measuring antioxidant and antimicrobial activity. A Fourier transform infrared spectroscopy was used to determine the potential interaction of functional groups of chitosan film and incorporated caraway essent…
Micro calorimeter of eight channels was used to study the influent law of different M/P ratio(quality ratio of magnesium and potassium dihydrogen phosphate),the ratio of water and binder(W/B ratio),borax content,dosage of fly ash and phosphate species on the magnesium phosphate cement hydration heat.The results show t…
優れた耐熱性，光学特性，および機械的性質を有する高性能透明ポリマー材料を設計するため，N-置換マレイミドと種々のスチレンおよびオレフィンモノマーの交互ならびに2：1定序配列制御型ラジカル共重合を行った．まず，これらシークエンス制御された共重合系の反応挙動を明らかにするため，末端モデルならびに前末端基モデルを用いて共重合組成曲線を解析し，モノマー反応性比を決定した．定序配列制御の発現には前末端基効果が重要な役割を果たし，前末端基効果の大きさはコモノマーの構造や重合溶媒の種類に依存した．これら交互および2：1定序配列制御型のマレイミド共重合体の熱的性質，光学特性，ならびに機械強度などの物性評価を行い，いずれの共重合体も高い熱分解開始温…
Various isomers of azomethine derivatives of mesoporphyrin IX were first obtained in the form of palladium complexes by the interaction of the so-called "phosphorus complex", produced in situ in the Vilsmeier-Haack reaction of allylamine and methylamine. The compounds were identified and characterized using the method…
Potential applications of nanofibers as a new-generation of material will be realized if suitable nanofiber yarns become available. Electrospinning has been widely accepted as a feasible technique for the fabrication of continuous nanofiber yarns. However its low output limited its industrial applications. This paper…
Over last ten years, we have carried out extensive research on the use of thin NiTi wires for advanced functional textiles. In this work we discuss general challenges and opportunities in the design, production and processing of NiTi textiles stemming from the fact that NiTi is martensitically transforming metal. As a…