Materials Literature
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Presently, collective understanding of the involved processes and requisite components that may lead to maturation of organic photovoltaic devices from bench top concept to disruptive solar energy conversion technology have not affected efficiencies within the balance of systems threshold. Primarily, poor broadband sp…
The article presents the problem solutions, connected with obtaining steel defect on mechanical properties, with the help of forecasting model, using the method of Random Forest (RF). For the analysis five indicators of mechanical properties (impact resistance KСU-60 oС and KCV-60 oС, ultimate strength, contraction ra…
为进一步提高Ni-Cu-P化学镀层的耐蚀性,设计了3种不同温度及保温时间的热处理工艺对镀层进行热处理。通过XRD分析了镀态及热处理态镀层结构的变化,通过2273电化学工作站测试了它们在3.5%Na Cl溶液中的极化曲线和交流阻抗。结果表明：热处理后由于Ni-Cu固溶体及Ni3P相的析出,使得热处理态镀层在腐蚀介质中具有更低的腐蚀电流密度和更高的电荷转移电阻,且300℃保温30 min的热处理工艺处理的镀层耐蚀性最佳。
Molecular dynamics simulations have been performed to study nanoindentation of NiAl and Ni3Al crystals on three surfaces: (100), (110), and (111). Obtained load-displacement curves show discrete drops at certain depths, indicating dislocation bursts in Ni3Al and structural phase transformation in NiAl underneath the i…
Enzymes are extremely powerful tools essential for all human life. Enzymes are usually comprised of hundreds of amino acids and rely on well-defined secondary structure for function. While short peptides do not normally adopt well-defined secondary structure, they have the potential to be good models for enzymes. The…
添加合金元素可提高非晶合金的耐蚀性。对Ti-Zr-Be-Cu块体非晶合金添加Co，采用电化学极化曲线和浸泡腐蚀法研究所制备的Ti35Zr30Be27.5-xCu7.5Cox（x=3．5，7．5，11．5）块体非晶合金在不同温度1mol／L HCl溶液中的腐蚀行为，探讨添加Co元素提高Ti—Zr—Be-Cu块体非晶合金耐蚀性的机理。结果表明：Ti35Zr30Be27.5-xCu7.5Cox块体非晶合金在298K的1mol／L HCl溶液中都具有很好的耐蚀性，阳极极化曲线表现出明显的钝化特征，随着Co元素含量的增大其耐蚀性能逐渐增强，非晶合金的自腐蚀电位高于不锈钢，自腐蚀电流密度比不锈钢小1个数量级；在313，333K的1mol／L…
Les bocaux de conserve sont fermés avec des couvercles à vis appelés twist-off ou quart de tour. La rondelle d’étanchéité contient le plus souvent du PVC avec un plastifiant. Le problème est d’une part que Bio Suisse interdit de manière générale le PVC dans les emballages et d’autres part que les plastifiants utilisés…
使用高温固相法制备了一种新的Bi3＋,Yb3＋共掺杂GdVO4量子裁剪近红外发光材料,该材料在波长为250～400nm的紫外光激发下发射出很强的近红外光（900～1100nm）.由于体系中Bi3＋离子的引入,相对于Gd0.9Yb0.1VO4,Gd0.87Yb0.1Bi0.03VO4在989nm处的近红外发光强度提高近120%,且其激发峰也从323nm红移至341nm,整个激发谱带更宽,更有利于实际应用.由于Yb3＋离子既可以利用基质中的VO3-4电荷迁移态跃迁的能量,也可以同时利用Bi3＋的1S0-3P1能级跃迁传递能量,相对于目前报道的理论量子裁剪效率最高的YVO4：Bi3＋,Yb3＋,GdVO4：Bi3＋,Yb3＋无论其近红外…
Based on our previous work on stationary oscillation modes of electrons around giant nuclei, we show how to treat a general driving force on the electron gas, such as the one generated by the breathing mode of the nucleus, by means of the spectral method. As an example we demonstrate this method for a system with Z =…
采用固相反应法合成了（1-x）CaTiO3/xNi0.5Zn0.5Fe2O4（0≤x≤1.0）复合材料,并研究了复合材料的物相、微观结构、介电性能和磁性能.结果表明：样品中仅含有钙钛矿型CaTiO3和尖晶石型Ni0.5Zn0.5Fe2O4.1260℃保温3h,样品相对密度达到98.91％,颗粒尺寸约为2μm.样品介电常数随Ni0.5Zn0.5Fe2O4含量（x）增加而增大.当x=0.7、测试频率为103Hz时,样品介电常数（er）和介电损耗（tanδ）分别为2629.18和1.74.（1-x）CaTiO3/xNi0.5Zn0.5Fe2O4复合材料显示磁性.其中x=0.7时,样品饱和磁化强度（Ms）达到49.07A·m2/kg;这归…
In the framework of the new generation of nuclear fission reactors, one of the promising systems is the Molten Salt Fast Reactor (MSFR) [1]. It is a thorium fuelled fast spectrum reactor in which the fissile and fertile materials are dissolved into a molten salt mixture.\nThe salt considered as primary candidate in th…
目的制备毒性低,生物相容性好的新型半导体量子点。方法以还原型谷胱甘肽（GSH）为硫源和稳定剂,采用水热法合成Cd Te/Cd S QDs。结果制备的GSH包裹的Cd Te/Cd S QDs波长范围覆盖400~800 nm的区域,量子产率高达83.1%,平均粒径约为3 nm。结论该Cd Te/Cd S QDs制备方法简便,成本低,有效降低了量子点生物毒性。
The experiment of NOx removal by non‐thermal plasma based on dielectric barrier discharge (DBD) was conducted and mainly focused on the influence of particle and NH3 on NOx removal efficiency. The results indicated the particle has negative effect on the de‐NOx process. However, the presence of NH3 has the ability to…
espanolEn este articulo se describen los conceptos basicos de la tecnologia de fluidos supercriticos, utilizando dioxido de carbono, asi como sus ventajas y aspectos mas relevantes relacionados con la polimerizacion y el procesado de polimeros mediante esta tecnologia. Se discuten aspectos como los procesos de extracc…
制备一系列不同La质量分数的La-Ni-S208^2-／ZrO2-A1203催化剂（记为La-Ni-SZA），采用XRD、BET、H2-TPR、FTIR、Py-IR等手段对催化剂进行表征。以正戊烷异构化为探针反应，考察La质量分数对催化剂结构和异构化性能的影响。结果表明：引入适量的La能使催化剂中四方晶相ZrO2的颗粒尺寸减小，改善催化剂的氧化还原性能，促进L酸和B酸的形成；催化剂总酸量顺序为La（1．0）-Ni-SZA〉Ni-SZA〉SZA；La质量分数为1．0％的La（1．0）-Ni-SZA催化剂具有最高的异构化活性，在反应温度为140。C、压力为2．0MPa、氢烃摩尔比为4、质量空速为1．0h^-1时，异戊烷产率达66．5％…
Using maleic anhydride as raw material, sodium tungstate as catalyst, hydrogen peroxide as oxidizing agent, calcium hydroxide as initiator, the synthesis conditions of the best scale inhibition performance of poly epoxy succinic acid were studied by using the method of polymerization: maleic anhydride dosage was 9.8g,…
目的研究三维多孔支架材料聚乳酸／纳米羟基磷灰石（PLLA／n-HA）的体外生物相容性，探讨其作为细胞培养材料和骨组织工程支架的可行性。方法将大鼠成骨细胞接种于PLLA／n—HA复合支架上，体外共同培养后，CCK-8法检测大鼠成骨细胞增殖活性，荧光倒置显微镜、扫描电子显微镜下观察PLLA／n-HA复合支架材料表面和孔隙内细胞粘附情况。结果CCK-8法检测显示实验组复合支架材料上细胞的增殖与空白对照组的差异无统计学意义（P〉0．05）；电镜观察到细胞在复合支架材料表面和孔隙内大量黏附、生长，并且随着共培养时间的增加，材料表面的细胞数量呈几何级增长。结论三维多孔支架材料PLLA／n-HA的生物相容性较好，可望成为一种性能良好的骨组织工程…
目的制备阿齐他赛聚乙二醇单甲醚一聚乳酸双嵌段共聚物（mPEG—PLA）聚合物胶束，考察栽药胶束的理化性质并研究其体外抗肿瘤活性。方法采用薄膜分散法制备阿齐他赛聚乙二醇单甲醚-聚乳酸双嵌段共聚物聚合物胶束，透射电镜观察载药胶柬的形态，激光粒度分析仪测定载药胶束的粒径和Zeta电位，考察栽药胶束的工艺重现性和复溶稳定性，HPL测定胶泉栽药量和包封率，透析法考察载药胶束的体外释放行为，并对释放曲线进行数学模型拟合，增殖抑制实验和周期阻滞实验评价其体外抗MCF-7肿瘤细胞活性。结果本实验成功制备了阿齐他赛聚合物胶束，其外观形态呈球形，粒径为24．50nm，粒径多分散指数为0．117，Zeta电位为-10．06mV．载药量为（16．00±0…
This work studies ring resonator based electro-optic polymer modulators for use as all-dielectric RF receivers and sensors. In particular, it analyzes and theoretically optimizes ring resonator design for the best possible performance in a given optical link. A fabrication scheme that solves one of the biggest issues…
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