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浏览/检索结果: 共8条,第1-8条 帮助

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Understanding crystal structure roles towards developing high-performance V-free BCC hydrogen storage alloys 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2022, 卷号: 47, 期号: 60, 页码: 25335-25346
作者:  
Hu, Huazhou;  Ma, Chuanming;  Zhou, Lu;  Xiao, Houqun
  |  收藏  |  浏览/下载:32/0  |  提交时间:2023/02/24
Simple O-2 Plasma-Processed V2O5 as an Anode Buffer Layer for High-Performance Polymer Solar Cells 期刊论文  OAI收割
ACS APPLIED MATERIALS & INTERFACES, 2015, 卷号: 7, 期号: 14, 页码: 7613-7618
作者:  
Bao, Xichang
收藏  |  浏览/下载:36/0  |  提交时间:2015/11/02
How to split a G-quadruplex for DNA detection: new insight into the formation of DNA split G-quadruplex 期刊论文  OAI收割
chemical science, 2015, 卷号: 6, 期号: 8, 页码: 4822-4827
作者:  
收藏  |  浏览/下载:24/0  |  提交时间:2016/05/03
Recent advances in synthesis, physical properties and applications of conducting polymer nanotubes and nanofibers 期刊论文  OAI收割
PROGRESS IN POLYMER SCIENCE, 2011, 卷号: 36, 期号: 10, 页码: 1415
Long, YZ; Li, MM; Gu, CZ; Wan, MX; Duvail, JL; Liu, ZW; Fan, ZY
收藏  |  浏览/下载:32/0  |  提交时间:2013/09/24
Effect of interface on luminescence properties in ZnO/MgZnO heterostructures (EI CONFERENCE) 会议论文  OAI收割
Wei Z. P.; Lu Y. M.; Shen D. Z.; Wu C. X.; Zhang Z. Z.; Zhao D. X.; Zhang J. Y.; Fan X. W.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
A set of ZnO/MgZnO heterostructures with well widths  Lw  varying from 2 to 20 nm has been grown by plasma-assisted molecular-beam epitaxy (P-MBE). We present a room-temperature (RT) study of the well-width-dependent photoluminescence (PL) spectra and carrier lifetimes in ZnO/MgZnO heterostructures. Bi-exponential process is seen at RT time-decay curves of the luminescence from the well layers. The fast process is from the recombination of the free exciton  while the slow process is attributing to the recombination of the localized exciton in the interface of ZnO and MgZnO. It is also confirmed from the PL peak shift of time-resolved PL spectra. With decreasing the well thickness  the fast process gradually increases and dominantly contributes to the PL spectrum due to the interface improvement. 2006 Elsevier B.V. All rights reserved.  
Excitonic properties of vertically aligned ZnO nanotubes under high-density excitation (EI CONFERENCE) 会议论文  OAI收割
Lu Y. M.; Liang H. W.; Shen D. Z.; Zhang Z. Z.; Zhang J. Y.; Zhao D. X.; Liu Y. C.; Fan X. W.
收藏  |  浏览/下载:13/0  |  提交时间:2013/03/25
In this paper  highly oriented and vertically arranged ZnO nanotubes are prepared on Al2O3 (0 0 0 1) substrate without employing any metal catalysts by plasma-assisted molecular beam epitaxy. The photoluminescence (PL) spectra at room temperature are studied under high excitation densities. Under lower excitation density (60 kW/cm2)  PL spectrum shows that one strong free exciton emission (FE) locates at 3.306 eV. As the excitation density increases up to 200 kW/cm2  a new emission peak (Pn) located at low-energy side of FE is attributed to the spontaneous emission due to an exciton-exciton (Ex-E x) scattering process from two ground state excitons  where one exciton is recombined by emitting a photon and the other is scattered into the excited states of n=2  3  4.... Under excitation density of 300 kW/cm 2  the stimulated emission originating from Ex-E x scattering is obtained. When the excitation density is above 580 kW/cm2  the emission from electron-hole plasma is observed in low-energy side of the P band and indicates a typical superradiation recombination processes with increasing excitation density. 2006 Elsevier B.V. All rights reserved.  
Formation and characteristics of quantum dots of wide band gap II-VI semiconductor (EI CONFERENCE) 会议论文  OAI收割
Fifth International Conference on Thin Film Physics and Applications, May 31, 2004 - June 2, 2004, Shanghai, China
Fan X. W.; Shan C. X.; Yang Y.; Zhang J. Y.; Liu Y. C.; Lu Y. M.; Shen D. Z.
收藏  |  浏览/下载:28/0  |  提交时间:2013/03/25
Study on optical parts of MOEMS optical switch with low insertion loss (EI CONFERENCE) 会议论文  OAI收割
MEMS/MOEMS Technologies and Applications II, November 10, 2004 - November 12, 2004, Beijing, China
作者:  
Wang W.;  Wang L.;  Wang L.;  Wang L.;  Chen W.
收藏  |  浏览/下载:32/0  |  提交时间:2013/03/25
We study insertion losses of optical switch when the laser beam is propagating during the free space between two single mode fibers (SMFs) and the related assemblage challenges  Then a new packaging structure is developed for the hybrid-integration of free-space MOEMS (micro-opto-electro-mechanical systems) chip with a silicon micromachined submount to improve alignment accuracy. The submount is designed to accommodate various free-space MOEMS chips with minimal active optical alignment  thus reducing the packaging cost. The silicon submount has a central recess to place the MOEMS chip in  sixteen V-grooves for optical fibers  and micropits for micro ball lenses  all bulk micromachined at the same time by a single anisotropic wet etching step. A corner compensation technique is employed to prevent erosion of the convex corners  where different geometries meet. Through this assembling method  the fiber  micro ball lens can be aligned preciously thus reduced lateral and angular misalignment between them. Then total insertion losses can be decreased.