共查询到20条相似文献，搜索用时 187 毫秒
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《黑龙江科技信息》2016,(32)
稀磁半导体的研究对于自旋电子学器件的研发与应用具有极其重要的意义。宽带隙ZnO基稀磁半导体因其具有独特的光电性能而备受青睐,尤其是在Ditle等人预言p型ZnO基稀磁半导体具有室温铁磁性之后,从而引起了人们的关注。虽然许多科研人员在ZnO基稀磁半导体材料的研究方面取得了丰硕的成果,但迄今为止所报导的结果大相径庭,仍然还有很多问题存在争议,尤其在磁性方面。常规的稀磁半导体制备方法,如磁控溅射和脉冲激光沉积技术等,均需要很高的生长温度,高生长温度容易催生颗粒在薄膜中的形成,但其低温下制备也难以保证薄膜的质量。运用等离子体增强化学气相沉积法制备稀磁半导体薄膜,具有无法比拟的优越性,对稀磁半导体的研究具有非常重要的学术意义和实用价值。 相似文献
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采用射频等离子体增强化学气相沉积(RF-PECVD)技术,探索性研究制备μc-Ge:H薄膜的基本沉积参数,通过一系列处理技术实现了高晶化率超薄μc-Ge:H薄膜的制备,有效拓展了太阳电池的光谱响应范围。 相似文献
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我国第一台激光分子束外延设备研制成功 总被引：2，自引：0，他引：2
激光分子束外延是近几年才出现的一种新型高精密制膜技术,它集普通脉冲激光沉积(PLD)的特点和传统分子束外延(MBE)的超高真空精确控制原子尺度外延生长的原位实时监控为一体,不仅可以生长通常的半导体超晶格材料,尤其适于制备多元素、高熔点、复杂层状结构,如超导体、光学晶体、铁电体、压电体、铁磁体以及有机高分子材料等薄膜,同时还能进行其相应的激光与物质相互作用和成膜过程的物理、化学等方面的基础研究。因此,激光分子束外延具有重要的学术意义和广泛的应用前景。 相似文献
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随着电沉积技术的不断发展,其在纳米材料制备方面的应用逐渐成为人们关注的焦点。本文综述了用电沉积技术制备纳米晶材料的机理,着重介绍了脉冲电沉积法和喷射电沉积法的作用机理和优点,并电沉积纳米晶材料的应用前景进行了展望。 相似文献
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用溶胶凝胶法在玻璃基板上以LiNb（OR）6先驱体溶液（用甲酸作稳定剂,乙二酸作对照实验）制备了铌酸锂薄膜,并对薄膜进行了IR、XRD和SEM表征,结果表明,生成的铌酸锂为多晶,与乙二酸相比,用甲酸作稳定剂制备的铌酸锂薄膜形貌更好。 相似文献
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《中国科学院院刊(英文版)》2004,18(1):32-39
Atomistic Study of Surface Kinetics in Growth of Nanostructures and Thin Films
With further functionality diversity and size miniaturization of optoelectronic devices, surface-based nanostructures and thin films with reduced dimensionalities have attracted much attention, by which some new-concept devices with novel functionality may be developed. Atomic-level understanding of surface dynamics at the initial stage of growthis of vital importance for controlling the formation and properties of these structures and thus the functionality of the devices made from them. 相似文献
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Yu Chen 《Journal of The Franklin Institute》1976,301(5):421-427
An elastic and a viscoelastic analyses have been performed to determine the extent to which thin polymer films used in “hyperfiltration” process of desalination of brackish or sea water may be stressed. It was found that if pores of the size comparable to the thickness of the film exist in the rigid supporting material, stress of the order of magnitude comparable to the ultimate strength of the film may be induced. 相似文献
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Yulong Wang Changyu Duan Pin Lv Zhiliang Ku Jianfeng Lu Fuzhi Huang Yi-Bing Cheng 《国家科学评论(英文版)》2021,8(8)
Photovoltaic technology offers a sustainable solution to the problem of soaring global energy demands. Recently, metal halide perovskite solar cells (PSCs) have attracted worldwide interest because of their high power conversion efficiency of 25.5% and great potential in becoming a disruptive technology in the photovoltaic industry. The transition from research to commercialization requires advancements of scalable deposition methods for both perovskite and charge transporting thin films. Herein, we share our view regarding the current challenges to fabrication of PSCs by printing techniques. We focus particularly on ink technologies, and summarize the strategies for printing uniform, pinhole-free perovskite films with good crystallinity. Moreover, the stability of perovskite solar modules is discussed and analyzed. We believe this review will be advantageous in the area of printable electronic devices. 相似文献
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金刚石膜具有天然金刚石相拟的优异特性，预计会有十分广阔的应用前景，本文介绍了一种新颖的金刚石膜生长技术－强流电子增强化学气相沉积法，它结合了传统的热丝法和等离子体法各自的优点，成为一种具有较高生长速率，能够制备大面积均匀金刚石膜的技术，对用这种方法制备的金刚石膜进行了喇曼、扫描电镜和Ｘ－Ｒａｙ衍射分析，并对这项技术的优点作了阐述。 相似文献
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Jairus Kleinert Vijay Srinivasan Arnaud Rival Cyril Delattre Orlin D. Velev Vamsee K. Pamula 《Biomicrofluidics》2015,9(3)
The operation of digital microfluidic devices with water droplets manipulated by electrowetting is critically dependent on the static and dynamic stability and lubrication properties of the oil films that separate the droplets from the solid surfaces. The factors determining the stability of the films and preventing surface fouling in such systems are not yet thoroughly understood and were experimentally investigated in this study. The experiments were performed using a standard digital microfluidic cartridge in which water droplets enclosed in a thin, oil-filled gap were transported over an array of electrodes. Stable, continuous oil films separated the droplets from the surfaces when the droplets were stationary. During droplet transport, capillary waves formed in the films on the electrode surfaces as the oil menisci receded. The waves evolved into dome-shaped oil lenses. Droplet deformation and oil displacement caused the films at the surface opposite the electrode array to transform into dimples of oil trapped over the centers of the droplets. Lower actuation voltages were associated with slower film thinning and formation of fewer, but larger, oil lenses. Lower ac frequencies induced oscillations in the droplets that caused the films to rupture. Films were also destabilized by addition of surfactants to the oil or droplet phases. Such a comprehensive understanding of the oil film behavior will enable more robust electrowetting-actuated lab-on-a-chip devices through prevention of loss of species from droplets and contamination of surfaces at points where films may break. 相似文献
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中国电影通过近30年的发展取得了巨大的成就,我国的本土电影也开始登上国际舞台。从代表着中国特色的张氏电影,到现阶段融合了西方元素在内的电影,其在国际上获得的成就无一不见证了中国电影的发展历程。本文从描述张艺谋的中国元素电影到融合了西方元素的国际电影的特色,来展示中国电影取得的发展和西方人对中国电影认知过程的变化。 相似文献
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光影作为造型语言的重要表现手段,历来受到电影工作者的重视。王家卫电影利用表现性光影塑造出分割、破碎的空间;以光影塑造场景氛围,烘托气氛,表现角色的性格特征和内心情感;运用表现性光影追求唯美的视觉效果和艺术境界。王家卫电影的光影艺术是一种抽象的视觉语言符号,是一种高度抽象化的真实,王家卫的成功尝试拓展了电影的创作空间和表现手法。 相似文献