Elaboration and Properties of Nanocomposite Structures Based on Crown Modified Platinum Nanoparticles

1 Results This paper presents the development of platinum nanocomposites structures based on organically modified c.a.2 nm core platinum nanoparticles.The chemical modification of the 4-mercaptoaniline functionalized particles by various in coming molecules is evidenced and precisely quantified.The particles can be dissolved like molecules in various solvents depending on the features of the new crown and X-rays shows that the interparticle distance is affected by the crown modification.These platinum n...     

早期电影与社会

作为一种新奇的娱乐方式,电影进入广州后十分受欢迎。到20世纪20年代,广州已涌现出不少电影院,电影市场的竞争越来越激烈。而广州的制片公司多为华侨所成立和经营,期间拍摄了不少影片。电影在反映广州社会变迁的同时也影响了广州社会的方方面面。     

用横场伊辛模型研究退极化场对铁电薄膜的影响

考虑到退极化场对铁电薄膜性质的影响,提出了一个改进的横场伊辛模型,在平均场理论的框架下研究了薄膜的一系列铁电行为.计算结果表明退极化场使薄膜的自发极化曲线更加平坦,膜的极化变得更加均匀,得到了与朗道—金兹堡理论的一致结果.     

华土题材·西方文本·性别言说

从好莱坞影片《花木兰》入手，结合东西方化语境，对艺作品中常见的“女扮男装”叙事模式及其二重性进行辩证透视，从而肯定性别批评有助于我们超越固有思维定势去发现新的作品世界。     

Fabrication and Application of High Quality Diamond-coated Tools

Diamond-coated tools were fabricated using Co-cemented carbide inserts as substrates by the electronically aided hot filament chemical vapor deposition (EACVD). An amount of additive in an acid solution was used to promote the Co etching of the substrate surface. The surface of the WC-Co substrate was decarburized by microwave plasma with Ar-H 2 gas. Effect of the new substrate pretreatment on the adhesion of diamond films was investigated. A boron-doped solution was brushed on the tool surface to diffuse ...     

显微组织对NdFeB磁体β（iHc）的影响

研究了显微组织对ＮｄＦｅＢ磁体ｉＨｃ及β（ｉＨｃ）的影响，对ＮｄｘＦｅ９３－ｘＢ７磁体，ｘ从１６增加到２８时，Ｈｃ增加了５５％，β（ｉＨｃ）降低了约１１％；进一步优化显微组织，增加富Ｎｄ晶间相，减弱晶粒间的磁耦合作用及消除晶粒表面的高退磁场区域，不仅可提高磁体的矫顽力，亦可显著改善其矫顽力温度系数。     

M-M型纳米颗粒膜的巨磁电阻效应

探讨了M-M型纳米颗粒膜巨磁电阻效应的物理机制，指出了影响颗粒膜巨磁电阻效应的因素，推导出M-M型纳米颗粒膜巨磁电阻效应的计算公式。     

射频溅射金属前驱体硫化法制备的Cu2ZnSnS4薄膜

采用射频溅射技术沉积Cu／Sn／Zn金属前驱体叠层结合硫化技术在玻璃衬底上成功制备了Cu2ZnSnS4薄膜。X-射线衍射分析表明，通过优化制备条件可以获得单一黝锡矿结构且具有（221）择优取向的Cu2ZnSnS4薄膜。霍尔效应和紫外可见透过谱测量表明，样品的薄膜电阻、吸收系数和光学带隙分别达到0．073Ω·cm，10^4cm^-1和1．53eV，具有适合作为薄膜太阳电池吸收层应用的可能性。     

互生共长的长青藤与参天大树——从文学作品改编看20世纪中国文学与现代传播之电影

20世纪中国文学十分幸运地发生、发展在一个现代传播飞速发展的时代.电影,是现代传播的一种形式.在过去的近百年的中国文学发展的历史中有许多的文学作品借助电影这一现代传播的形式得以广泛传播,经久不衰;电影也从20世纪中国文学的宝库中汲取了丰富的创作源泉.近百年来,它们互生互长,共同繁荣,结出了累累硕果.     

Preparation of InSb nanocrystals embedded in SiO2 thin films

InSb nanocrystals embedded in SiO₂ thin films were prepared by rf magnetron cosputtering technique. THe observation by transmission electron microscope showed that InSb nanocrystals dispersed uniformly in SiO₂ matrices. InSb nanocrystals with different sizes can be obtained by changing the annealing condition. The average size of InSb nanocrystals depended on annealing temperature and time, but not on the t_1/3 rules. X-ray photoelectron spectroscopy and X-ray diffraction were also applied to the analyses of the composite thin films.