Defect of nanocrystalline copper and silver

来源 :Science in China(Series B) | 被引量 : 0次 | 上传用户:wychenjian
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Nanoscale copper and silver were synthesized by the H 2+Ar arc plasma method. During the synthesis, hydrogen molecules were dissociated into hydrogen atoms and stored in the particles. At the same time, nanometer copper and silver particles were prepared by the inert gas condensation method whose power is about identical with the hydrogen arc plasma method. Various specimens were annealed respectively at low temperature. The particle size was measured by a transmission electron microscopy. A proper temperature was chosen to prepare the standard specimen. The defects of nano copper and nano silver were studied by TEM, HRTEM, XRD profile refinement and Fourier analysis method. The asymmetry of XRD profile of both specimens was discovered and the significance of the asymmetry was studied. The probability of twin existing in the nano materials was calculated using Fourier analysis method, and the effect of hydrogen on the structure was discussed. Nanoscale copper and silver were synthesized by the H 2 + Ar arc plasma method. During the synthesis, hydrogen molecules were dissociated into hydrogen atoms and stored in the particles. At the same time, nanometer copper and silver particles were prepared by the inert gas condensation method whose power is about identical with the hydrogen arc plasma method. Various particle were annealed respectively at low temperature. The particle size was measured by a transmission electron microscopy. nano silver were studied by TEM, HRTEM, XRD profile refinement and Fourier analysis method. The asymmetry of XRD profile of both specimens was discovered and the significance of the asymmetry was studied. The probability of twin existing in the nano materials was calculated using Fourier analysis method, and the effect of hydrogen on the structure was discussed.
其他文献
48年前,一位农民的17岁的儿子去洛阳城的中国人民银行上班,临别时老人家交待了儿子一句话:咱家祖祖辈辈没有一个人干过银行,咱村世世代代也没有一个人干过银行,记着,银行是管公家钱的,一
苯丙氨酰-tRNA合成酶是布氏锥虫蛋白合成过程中的一类重要酶,以其为靶点的抑制剂可能发展成为新一代的抗锥虫药物,但此前并没有分离锥虫苯丙氨酸-tRNA合成酶的报道。本研究用
华北油田,超越了众多看似不可超越的艰难困苦。厚重与活力、澎湃与包容,过往、现在和未来,成就了华北油田全景观似的文化背景,这也正是它强筋壮骨的根基。华北油田的现实,似
2014年12月12日晚,中国的最后一个“压寨夫人”杨丙莲在湖南湘西去世,享年94岁。一个本应平凡的女人,却因嫁给了一个民谣中背负着“天见张平,日月不明;地见张平,草木不生;人
为了深入学习宣传贯彻党的十八大、十八届三中、四中全会精神,不断适应传统媒体与新兴媒体融合发展的新要求,努力推进党刊“传播力、公信力、影响力”建设,《实践》杂志思想
研究了在温和酸消化法砷-铈催化反应体系中HClO3、NaCI和H2SO4的作用和影响。采用尿碘测定标准方法[5]对HClO3、NaCl和H2SO4在不同浓度下进行对比实验,结果表明HClO3、NaCl对砷—铈反应均具有催化作用,H2SO4能增大Ce4+的吸光度,当溶
2014年3月23日,以“现代医学·中医药学·共融发展”为主题的2014·诺贝尔奖获得者医学峰会暨院士医学论坛在京举行。国家卫生和计划生育委员会副主任、国家中医药管理局局长
神光山青松肃立,宁江河碧水致哀。今年2月10日上午,广东省梅州市政府、梅州军分区和兴宁市干部群众怀着沉痛的心情,向唐洪胜这位为保护国家森林资源和人民群众生命财产而献
孙子小的时候,我哄他吃饭,睡觉,唱歌,玩耍和学习,从小到大获得的奖状、荣誉证书不计其数。现在他是一个品学兼优、高大英俊的“帅哥”。经常上网查资料,发信息,听音乐,看电影
“守护天使”是对社会各界爱心人士到北京市属医院定期从事门诊导医、患者陪伴、心灵抚慰、健康宣教、医院文化建设等志愿服务的志愿者的统称。“守护天使”志愿服务工作,以