中国科学院机构知识库网格系统: 检索

功能纳米材料抑制肿瘤转移及促进组织修复的机制研究 学位论文 OAI收割
北京: 中国科学院生态环境研究中心, 2019
作者: 汪顺浩

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黑磷量子点钯纳米片纳米全氟化碳乳腺癌转移组织修复 Black p Hosphorus q Uantum d Ots, Palladium n Ano Plate s, nAno Perfluorocarbons, b Reas t c Ancer Metastasis, Tissue Repair

Hydrogen storage properties of Li-decorated B2S monolayers: A DFT study 期刊论文 OAI收割
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2019, 卷号: 44, 期号: 31, 页码: 16803-16810
作者: Liu, Zhiyang; Liu, Shi; Er, Suleyman

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收藏 | 浏览/下载：17/0 | 提交时间：2021/02/02

DFT 2D materials B2S Li Molecular hydrogen storage

Assembly modeling technology for satellite virtual assembly 会议论文 OAI收割
Wellington, New zealand, April 26, 2017 - April 28, 2017
作者: Liang, Mingyang; Song, You; Wang, Yue; Peng, Xiaodong; Nie, Dianhui

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收藏 | 浏览/下载：28/0 | 提交时间：2018/02/28

Satellite Cad Conceptual Design Web3d Browser/server(B/s)

GLOBAL WELL-POSEDNESS IN ENERGY SPACE OF SMALL AMPLITUDE SOLUTIONS FOR KLEIN-GORDON-ZAKHAROV EQUATION IN THREE SPACE DIMENSION 期刊论文 OAI收割
ACTA MATHEMATICA SCIENTIA, 2016, 卷号: 36, 期号: 4, 页码: 1117-1152
作者: Huo, Zhaohui

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收藏 | 浏览/下载：29/0 | 提交时间：2018/07/30

Global well-posedness 3D Klein-Gordon-Zakharov equation dyadic X-s,X-b spaces in higher dimension

基于二噻吩并咔唑与苯并噻二唑的 D-A 型共轭聚合物的合成与表征 学位论文 OAI收割
硕士, 中国科学院长春应用化学研究所: 中国科学院研究生院, 2015
作者: 荣梓清

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由于给体片段（D）和受体片段（A）间的电荷转移 D-A型共轭高分子通常具有较小的光学带隙且分子偶极矩较大分子间相互作用较强利于获得高的载流子迁移率因此 D-A型共轭聚合物是有机太阳能电池材料领域的研究热点。另一方面稠环分子由于具有刚性平面的构型重组能小等优点而被广泛引入D-A型共轭聚合物体系中。因此本文以二噻吩并[2 3-b:7 6-b]咔唑（C1）和二噻吩并[3 2-b:6 7-b]咔唑（C2）两个稠环单元作为给体片段苯并噻二唑（BT）单元作为受体片段合成了一系列D-A型共轭聚合物并且对它们的光物理性质电化学性质载流子传输和光伏特性进行了系统研究主要成果和创新点如下：（1）合成了基于二噻吩并咔唑和烷氧基取代的BT单元的两个聚合物P(BT-C1)和P(BT-C2) 它们均是无定形聚合物。尽管P(BT-C1)和P(BT-C2)在分子结构上只有硫原子位置不同的差别但两者在长波长和短波长范围表现出完全相反的相对吸收强度。通过理论模拟可以发现两个聚合物骨架构象完全不同 P(BT-C1)的骨架较为弯曲而P(BT-C2)的骨架线性较好。因此基于P(BT-C2)的有机薄膜晶体管（OTFT）的迁移率较高达到5.4×10-3 cm2V-1s-1 而P(BT-C1)的OTFT迁移率较低为1.9×10-3 cm2V-1s-1。 P(BT-C2)的HOMO能级比P(BT-C1)深0.2 eV左右因此基于P(BT-C2)的体异质结有机太阳能电池（OSC）器件的开路电压（Voc）明显高于P(BT-C1) 而P(BT-C1)与PC71BM共混薄膜相分离更加明显导致P(BT-C1)的OSC器件的短路电流密度（Jsc）和填充因子（FF）较高两个聚合物的能量转换效率（PCE）相差不多均在5%左右。（2）以C2为给体单元 BT和二氟代BT为受体单元合成了两个共轭聚合物P(C6BT-C2)和P(C6BT2F-C2)。与P(BT-C2)相比 P(C6BT-C2)具有较高的热稳定性 HOMO能级升高光谱红移。在BT单元上引入F原子后聚合物的HOMO能级由P(C6BT-C2)的-5.00 eV降低到P(C6BT2F-C2)的-5.20 eV 同时帯隙变窄。理论模拟发现两者的分子平面性比P(BT-C2)有很大改善但分子骨架构象较为弯曲。基于P(C6BT-C2)与P(C6BT2F-C2)的OTFT器件在150 oC退火后载流子迁移率分别为4.8×10-3 和4.9×10-3 cm2V-1s-1 。由于与PC71BM共混薄膜的相分离不明显基于P(C6BT-C2)与P(C6BT2F-C2)的OSC器件的Jsc和FF较低 PCE均小于2%。

基于S3C2440A的时统终端系统的设计 期刊论文 OAI收割
仪表技术与传感器, 2012, 期号: 07, 页码: 42-44
佟刚; 崔明

收藏 | 浏览/下载：18/0 | 提交时间：2013/03/11

S3C2440A A/D转换 IRIG-B码时间码

Energy transfer in Y3Al5O12:Ce 3, Pr3+ and CaMoO4:Sm3, Eu 3 phosphors (EI CONFERENCE) 会议论文 OAI收割
作者: Wang L.; Wang X.-J.; Zhang X.; Zhang X.; Zhang X.

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Non-radiative energy transfers (ET) from Ce3 to Pr3+ in Y3Al5O12:Ce3 Pr3+ and from Sm3 to Eu3 in CaMoO4:Sm3 Eu3 are studied based on photoluminescence spectroscopy and fluorescence decay patterns. The result indicates an electric dipoledipole interaction that governs ET in the LED phosphors. For Ce3 concentration of 0.01 in YAG:Ce3 Pr3+ the rate constant and critical distance are evaluated to be 4.510-36 cm 6 s-1 and 0.81 nm respectively. An increase in the red emission line of Pr3+ relative to the yellow emission band of Ce 3 on increasing Ce3 concentration is observed. This behavior is attributed to the increase of spectral overlap integrals between Ce3 emission and Pr3+ excitation due to the fact that the yellow band shifts to the red spectral side with increasing Ce3 concentration. In CaMoO4:Sm3 Eu3 Sm 3Eu3 transfer occurs from 4G5/2 of Sm3 to 5D0 of Eu3. The rate constant of 8.510-40 cm6 s-1 and the critical transfer distance of 0.89 nm are evaluated. 2010 Elsevier B.V. All rights reserved.

Energy transition between Yb3+-Tm3+-Gd3+ in Gd3+, Yb3+ and Tm3+ Co-doped fluoride nanocrystals (EI CONFERENCE) 会议论文 OAI收割
17th International Conference on Dynamical Processes in Excited States of Solids, DPC'10, June 20, 2010 - June 25, 2010, Argonne, IL, United states
作者: Zhang J.; Zhang J.; Zhang J.

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YF3: 20%Gd3+ 20%Yb3+ 0.5%Tm3+ nanocrystal has been synthesized by a hydrothermal method. The upconversion (UC) emission and energy transfer progresses between Gd3+-Yb 3+-Tm3+ under a 980-nm continuous wave semiconductor laser diode excitation have been explored. The experimental results show that the violet and ultraviolet (UV) enhancement with Tm3+ upconversion emission occurs in the nanocrystal and in the same time the UC emissions of Gd3+ from 6D9/2 6IJ 6P5/2 and 6P7/2 states to the ground state 8S7/2 are obtained too. The dynamic analysis implies that under 980-nm excitation the nanocrystal dimension plays a key role in the efficient energy transfer processes between Gd3+-Yb 3+-Tm3tt based on the energy matching conditions. 2011 Published by Elsevier B.V.

Selection rules for 4f2&rarr4f2 electric dipole transitions by considering mixing with 4f5d components of Pr3+ in SrAl12O19 (EI CONFERENCE) 会议论文 OAI收割
作者: Wang X.-J.; Zhang J.-H.

收藏 | 浏览/下载：20/0 | 提交时间：2013/03/25

A set of selection rules is deduced for the 4f2 transitional levels that mix with explicit 4f5d components. Based on these selection rules the dipole-allowed transitions between the 4f2 crystal field levels are determined in Pr3+ doped SrAl12O19. Meanwhile the main 4f5d components mixed into 4f2 transitional levels are identified by determining the nonzero matrix elements of both the odd-rank crystal-field and the electric dipole operator. The selection rules have been applied to analyze the transitions from 1S0 and 3P0 to lower crystal field levels. 2006 Elsevier B.V. All rights reserved.

Search for rare quark-annihilation decays, B--> D-s((*)-)phi 期刊论文 OAI收割
PHYSICAL REVIEW D, 2006, 卷号: 73, 期号: 1
作者: BaBar Collaboration

收藏 | 浏览/下载：16/0 | 提交时间：2015/12/02

HADRONIC DECAYS B-MESONS B+->D-S(+)PHI PHYSICS