中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共8条,第1-8条 帮助

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Wiley电子图书及WOL平台检索使用指南 演示报告  OAI收割
2014
图书馆
收藏  |  浏览/下载:34/0  |  提交时间:2014/03/24
Molecular Weight Dependency of Crystallization and Melting Behavior of beta-Nucleated Isotactic Polypropylene 期刊论文  OAI收割
journal of polymer science part b-polymer physics, 2014, 卷号: 52, 期号: 19, 页码: 1301-1308
Lu, Ying; Wang, Qiao; Men, Yongfeng
收藏  |  浏览/下载:28/0  |  提交时间:2015/10/19
Compounds of isotactic polypropylene (iPP) and beta-nucleating agent were used to investigate the relationship between the development of beta phase and molecular weight in iPP under quiescent crystallization conditions by using wide angle X-ray diffraction and differential scanning calorimetry techniques. In all cases  the dependency of the formation of beta phase in iPP on molecular weight of iPP at a defined crystallization temperature range was found. The iPP with high molecular weight possessed a wide range of crystallization temperature in inducing rich beta phase. However  poor or even no beta phase was obtained for the samples with low molecular weight in the same range. In addition  an upper critical crystallization temperature of producing dominant beta phase was found at 125 degrees C. Beyond this temperature  a phenomenon of prevailing alpha phase became obvious. (C) 2014 Wiley Periodicals  Inc.  
A simplified poly(dimethylsiloxane) capillary electrophoresis microchip integrated with a low-noise contactless conductivity detector 期刊论文  OAI收割
ELECTROPHORESIS, 2011, 卷号: 32, 期号: 6-7, 页码: 699-704
Liu,BY; Zhang,Y; Mayer,D; Krause,HJ; Jin,QH; Zhao,JL; Offenhausser,A
收藏  |  浏览/下载:10/0  |  提交时间:2012/04/12
Signal readout for pyroelectric detector based on relaxor ferroelectric single crystals 期刊论文  OAI收割
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2011, 卷号: 208, 期号: 5, 页码: 1078-1083
Wang, J; Jing, YO; Jing, WP; Li, YJ
收藏  |  浏览/下载:12/0  |  提交时间:2012/04/12
Time-delay dependent H infinity model simplification for singular systems with Markovian jumping parameters 期刊论文  OAI收割
OPTIMAL CONTROL APPLICATIONS & METHODS, 2011, 卷号: 32, 期号: 4, 页码: 379-395
Lu, HQ; Zhou, WN; Xu, YH; Fang, JA; Tong, DB
收藏  |  浏览/下载:8/0  |  提交时间:2012/04/11
以读者需求为导向的电子文献资源建设及调整——以中国科学院成都分院WileyInterScience数据库使用为例 期刊论文  OAI收割
图书馆工作与研究, 2008, 期号: 10, 页码: 41-45
作者:  
朱江;  朱江;  朱江;  朱江;  朱江
收藏  |  浏览/下载:11/0  |  提交时间:2009/03/10
Raman spectra and phonon modes of MgxZn1-xO alloy films (EI CONFERENCE) 会议论文  OAI收割
12th International Conference on II-VI Compounds, September 12, 2005 - September 16, 2005, Warsaw, Poland
Wei Z. P.; Lu Y. M.; Shen D. Z.; Zhang Z. Z.; Wu C. X.; Zhang J. Y.; Yao B.; Fan X. W.
收藏  |  浏览/下载:13/0  |  提交时间:2013/03/25
Hexagonal MgxZn1-xO alloy layers with 0 &le 0.3 have been grown by plasma-assisted molecular beam epitaxy on sapphire (006) and Si (111) substrates. Their crystal structures are characterized by x-ray diffraction spectroscopy. The nonresonant and resonant Raman spectra were measured using 488 nm line from Ar+ laser  and 325 nm line from He-Cd laser by backscattering geometry. Four Raman modes (E2 high  LO  TO  multiphonon processes) were observed in the nonresonant Raman spectra of hexagonal MgxZn1-xO with different Mg contents. The optical phonon frequencies were found to display one-mode behaviour for all the samples since no separate ZnO- and MgO-like modes were observed. The long-wavelength frequencies of ZnO-like optical phonons measured in the resonant Raman spectra can be expressed as linear functions of x. These behaviours can be explained within a modified random-element-isodisplacement model (MREI). 2006 WILEY-VCH Verlag GmbH Co. KGaA.  
Ultraviolet electroluminescence of ZnO based heterojunction light emitting diode (EI CONFERENCE) 会议论文  OAI收割
12th International Conference on II-VI Compounds, September 12, 2005 - September 16, 2005, Warsaw, Poland
Jiao S. J.; Lu Y. M.; Shen D. Z.; Zhang Z. Z.; Li B. H.; Zhang J. Y.; Yao B.; Liu Y. C.; Fan X. W.
收藏  |  浏览/下载:16/0  |  提交时间:2013/03/25
ZnO/GaN p-i-n heterojunctions light emitting diodes were fabricated by plasma-assisted molecular beam epitaxy. We make use of high resistivity of nitrogen doped ZnO to fabricate n-ZnO/i-ZnO/p-GaN heterojunction light emitting diode. The emission of i-ZnO was obtained due to the limitation effect of i-ZnO on electrons and holes. Moreover  n-ZnO/i-MgO/p-GaN heterojunction light emitting diode was also fabricated. The limitation effect on electrons is increased in this heterojunction. The bright ultraviolet electroluminescence at 382 nm originating from the ZnO layer was observed in the room temperature electroluminescence spectrum. We hope to realize the stimulated emission of ZnO using these heterojunctions by the improvement of crystal quality and the optimization of device structure. 2006 WILEY-VCH Verlag GmbH Co. KGaA.