共查询到20条相似文献,搜索用时 140 毫秒
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本文以硝酸银(AgNO3)为银源,乙二醇(EG)为还原剂和溶剂,聚乙烯吡咯烷酮(PVP)为生长导向剂,氯化铜(CuCl2)为晶型诱导剂,采用多元醇还原法制取银纳米线.通过SEM、TEM、XRD、XPS和UV?vis等测试方法,分析了银纳米线的生长机制,并探讨了PVP辅助银纳米线定向生长的具体原理.研究结果表明,银纳米结构是在五边孪晶晶种上定向生长为一维的纳米线,PVP中的氧原子会与纳米银表面的银原子产生强烈的相互作用来控制着银纳米线的单向生长过程,并且当PVP与AgNO3的摩尔浓度比为6时可制取形貌规整、长度超过60 um的银纳米线. 相似文献
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金属援助硅化学刻蚀法可控制备硅纳米线阵列 总被引:1,自引:0,他引:1
基于金属援助硅化学刻蚀机理,成功地发展了一种形貌可控地制备硅纳米线阵列的有效方法。在该方法中,通过银纳米颗粒催化层的微结构和硅化学刻蚀的时间来调控硅纳米线阵列的形貌。扫描电子显微镜(SEM)形貌表征的实验结果证实:硅纳米线阵列的孔隙率依赖银纳米颗粒催化层的微结构,硅纳米线阵列的高度依赖于硅的刻蚀时间。这种形貌可控地制备单晶硅纳米线阵列的方法简单、有效,可用于构筑硅纳米线光伏电池等各种硅基纳米电子器件。 相似文献
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银纳米线是制作纳米光电子器件的理想材料,了解银纳米线与特定衬底间的摩擦特性对于器件的设计和制备工艺具有重要参考价值.本文利用原子力显微镜(AFM)研究银纳米线与二氧化硅衬底表面的摩擦特性,为提高摩擦力测量准确性,依次借助斜面法和横向力曲线分别标定了AFM探针的扭转弹性常数和光杠杆横向灵敏度,同时对扫描器引入的横向误差进行了补偿.利用AFM纳米操纵技术记录了单根银纳米线由静止到整体滑动的全过程,实验测得直径50 nm银纳米线与二氧化硅衬底表面的最大静摩擦线密度和滑动摩擦线密度分别为1.07 nN/nm和0.56 nN/nm. 相似文献
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《中国无线电电子学文摘》2007,(3)
TG1132007030023直接置换法制备包覆型纳米铜-银双金属粉末/罗江山,刘伟,黎军,雷海乐,唐永建,吴卫东(中国工程物理研究院激光聚变研究中心)//强激光与粒子束.―2006,18(4).―591~594.以AgNO3为主盐,采用直接置换法初步制备了包覆型纳米铜-银双金属粉末,分析了工艺条件对包覆效 相似文献
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The article describes a model representation of radar probing data in form of a mixture of background and target samples, which is the sum of two random variables with very different parameters. For model development we research the behavior of the central moments of the distribution mix without assuming the distribution law form. An example it is described the detection of the signal at the output of compression system of chirp ionosonde. 相似文献
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解决IP网QoS问题是目前通信领域的研究热点之一.虽然研究已经取得了一定的进展,但人们对于IP 网QoS本身的含义及相关的问题还有着不同的理解.本文将从IP网QoS的定义入手讨论相关的一些问题以及解决IP网QoS问题所做的各种努力. 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1968,56(6):1024-1032
Assuming that visual responses are due to the action of particles on the membrane of the visual cells, the stochastic variability of the response should be a function of the number of particles producing it. Quantitative predictions can be made with the aid of a model proposed in previous articles. It is found that responses produced in visual cells of Limulus by absorption of a single photon have the stochastic properties which would be expected if the response to one photon were brought about by 25 particles. It is concluded from this that the processes leading to visual responses produce multiplication of particles. The effects of temperature and of metabolic poisons suggest that these processes are of chemical nature. 相似文献
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罗晓羽 《信息技术与标准化》2008,(6):37-39
论述了推进电子行业标准制修订项目计划管理信息化的必要性.并提出了具体措施;详细介绍了电子行业标准制修订项目计划管理数据库的设计思路和实现方法.阐述了对后续工作的几点思考. 相似文献
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对影响镍镀层内应力的因素做了介绍和分析,提出了对收缩应力的一种解释,提供了排除这些因素影响的方法,指出重视镀液的管理是减少各种影响内应力因素的主要办法。 相似文献
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By means of exact conformal mapping method we have defined character of dependence of squares amounts of angular part of film
element on angled part dimension. We propose relations, approximating obtained dependence. Calculation results and experimental
researches of large-scale models are represented. 相似文献
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Moshrefzadeh R.S. Radcliffe M.D. Lee T.C. Mohapatra S.K. 《Lightwave Technology, Journal of》1992,10(4):420-425
The temperature dependence of refractive index of polymer films was determined for a number of slab waveguides by a grating coupling method. This dependence was examined as a function of parameters such as molecular weight and glass transition temperature of the polymer. Temperature-induced changes in N TE-N TM , N being the effective index, were studied systematically for different slab waveguide compositions. It is shown that with proper device design and choice of polymeric materials, thermal effects can be reduced 相似文献
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A. M. Emel’yanov 《Semiconductors》2010,44(9):1134-1139
A method for analyzing the luminescence spectra of semiconductors is suggested. The method is based on differentiation of
the spectra. The potentialities of the method are demonstrated for luminescence in the region of the fundamental absorption
edge of Si and SiGe alloy single crystals. The method is superior in accuracy to previously known luminescence methods of
determining the band gap of indirect-gap semiconductors and practically insensitive to different conditions of outputting
radiation from the sample. 相似文献