检索结果-南通市图书馆

High-efficiency photon-electron coupling resonant emission in GaN-based microdisks on Si

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第8期29卷 276-280页

作者： Menghan Liu Peng Chen zili xie Xiangqian Xiu Dunjun Chen Bin Liu Ping Han Yi Shi Rong Zhang Youdou Zheng Kai Cheng Liyang Zhang Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and School of Electronic Science and Engineering Nanjing UniversityNanjing 210093China Enkris Semiconductor Inc.NW-20 Nanopolis Suzhou99 Jinji Avenue 215123China

Resonance effects caused by the photon-electron interaction are a focus of attention in semiconductor optoelectronics,as they are able to increase the efficiency of ***-on-silicon microdisks can provide a perfect cavity structure for such resonance to *** we report GaN-based microdisks with different diameters,based on a standard blue LED wafer on a Si substrate.A confocal photoluminescence spectroscopy is performed to analyze the properties of all ***,we systematically study the effects of radial modes and axial modes of these microdisks on photon-electron coupling efficiency by using three-dimensional finite-difference time-domain *** thick microdisks,photon-electron coupling efficiency is found to greatly depend on the distributions of both the radial modes and the axial modes,and the inclined sidewalls make significant influences on the axial mode *** results are important for realization of high-efficiency resonant emission in GaN-based microcavity devices.

关键词： microdisks photon-electron coupling whispering gallery mode axial mode

Simulation of growing GaN in vertical HVPE reactor

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2010年第1期53卷 72-75页

作者： ZHAO ChuanZhen, XIU XiangQian , ZHANG Rong , xie zili, LIU Bin, LIU ZhanHui, YAN HuaiYue & ZHENG YouDou Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Department of Physics, Nanjing University, Nanjing 210093, China 1. Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials Department of Physics Nanjing University Nanjing 210093 China

The paper reports the setting up of a model of fluid dynamic for GaN HVPE system and the simulation. It is found that when the direction of gravity is opposite to the direction of GaCl flow inlet,there exits a distance at which the uniformity of the deposition is optimal. Here the good uniformity of the deposition is obtained when the distance between the substrate and GaCl inlet is 5 cm. The parameters of gas flow used in growing GaN are also optimized. In addition, the influence of gravity and buoyancy on the deposition of GaN is discussed, too. It is found that the angle between the direction of gravity and the direction of GaCl flow inlet has a major effect on the deposition rate and the uniformity of the growth. Compared with the situation when the direction of gravity is the same with the direction of GaCl flow inlet, although the deposition rate of GaN has decreased obviously, the uniformity of the deposition has improved largely when the direction of gravity is opposite to the direction of GaCl flow inlet.

关键词： GaN HVPE fluid dynamic

Defensins,a novel kind of potassium channel inhibitors

在线全文

学校读者我要写书评

暂无评论

Defensins,a novel kind of potassium channel inhibitors

Low-threshold lasing in a plasmonic laser using nanoplate InGaN/GaN

第12届生物毒素研究及医药应用学术大会

作者： zili xie Jing Feng Weishan Yang Zhijian Cao Zongyun Chen Yingliang Wu State Key Laboratory of Virology College of Life SciencesWuhan University Department of Biochemistry and Molecular Biology Medicinal Macromolecular LaboratorySchool of Basic Medical SciencesHubei University of Medicine

It is well known that the potassium channels（as a kind of shield）,are widely blocked or inhibited by the peptide toxins（as a kind of spear） from venomous animals,such as scorpions,snakes,spiders,bees,sea *** animal toxins adopt various binding interfaces to interact with potassium *** example,the scorpion toxin BmKTX and its three highly similar analogues adopt distinct molecular surfaces to interact with Kvl.3 ***,whether defensins with the similar animal toxin structures could inhibit potassium channels is an interesting *** serve a central role in innate immunity in all species of plants and *** are short cationic peptides that are usually stabilized by three disulfide *** the basis of the structural similarity between defensins and animal toxins,we in succession discovered that some defensins could differentially inhibit potassium *** example,the human β-defensin 2（hBD2） can selectively inhibit the human Kvl.3 channel through simultaneously interacting with extracellular S1-S2 linker and pore region（Cell Mol Life Sci,2015,72:845-53;J BiolChem,2015,290:15487）,which is the first endogenous peptide inhibitor binding to human potassium channel,and the first peptide recognizing the extracellular S1-S2 linker of potassium *** human α-defensins human neutrophil peptide（HNP） 1 and human defensin（HD） 5 were recently found to be selective Kvl.3 channel inhibitors with distinct *** to hBD2,HNP1 also simultaneously bind to the S1-S2 linker and the pore region of Kvl.3 channel,whereas HD5 only binds to the channel pore region as a classical toxinlike blocker（FASEB J,2015,published online）.Besides,the fungal defensinplectasin was also found to inhibit potassium channel,which is the first potassium channel-blocking fungal defensin（Toxins,2015,7:34-42）.These findings evidence that defensins from different species are a novel kind of potassium channel inhibitors.

关键词： Antimicrobial peptides Hemolysis Serum stability MRSA skin infection Resistance

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Semiconductors 2021年第12期42卷 52-56页

作者： Ting Zhi Tao Tao Xiaoyan Liu Junjun Xue Jin Wang Zhikuo Tao Yi Li zili xie Bin Liu College of Electronic and Optical Engineering Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210023China Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Nanjing National Laboratory of Microstructures Nanjing UniversityNanjing 210093China School of Information Science and Technology Nantong UniversityNantong 226019China Tongke School of Microelectronics Nantong UniversityNantong 226019China

Plasmonic nanolaser as a new type of ultra-small laser,has gain wide interests due to its breaking diffraction limit of light and fast carrier dynamics ***,the main problem that need to be solved for plasmonic nanolaser is high loss induced by optical and ohmic losses,which leads to the low quality *** this work,InGaN/GaN nanoplate plasmonic nanolaser with large interface area were designed and fabricated,where the overlap between SPs and excitons can be *** lasing threshold is calculated to be~6.36 kW/cm^(2),where the full width at half maximum(FWHM)drops from 27 to 4 *** the fast decay time at 502 nm(sharp peak of stimulated lasing)is estimated to be 0.42 *** lasing characters are mainly attributed to the strong confinement of electromagnetic wave in the low refractive index material,which improve the near field coupling between SPs and *** plasmonic laser should be useful in data storage applications,biological application,light communication,especially for optoelectronic devices integrated into a system on a chip.

关键词： surface plasmon plasmonic laser GaN

在线全文

学校读者我要写书评

暂无评论

变频空调实际运行模式识别及数据挖掘

机械工程学报 2019年第6期55卷 194-202页

作者：梁志豪巫江虹谢子立华南理工大学机械与汽车工程学院广州510641 多伦多大学文理学院

变频空调的长期运行数据是空调在实际环境中运行状态最直接的反映,空调运行的内在规律潜藏在其长期的运行数据中,分析其长期运行数据时,由于数据冗余、存在异常数据等原因,需要采用数据挖掘的方法进行研究。采用聚类算法进行分析,空调... 详细信息

变频空调的长期运行数据是空调在实际环境中运行状态最直接的反映,空调运行的内在规律潜藏在其长期的运行数据中,分析其长期运行数据时,由于数据冗余、存在异常数据等原因,需要采用数据挖掘的方法进行研究。采用聚类算法进行分析,空调的运行模式可总结为三种模式,即上午高负荷模式、下午高负荷模式以及低频平稳模式,三种模式下空调的送风温度都比较接近,但室外温度有所区别。上午(下午)高负荷模式中,室外温度在上午(下午)最高,功率及制冷性能系数(Energy efficiency ratio, EER)分别处于峰值及谷值,低频平稳模式下,室外温度并不高,开机后空调运行比较稳定,运行参数变化不大。此后,采用控制变量法和多项式拟合来分析环境工况参数对空调性能的影响,室外侧环境温度、空调回风温度的升高均导致空调的功率增加,而空调的EER随着回风温度的升高而增加,随着室外温度及空调的功率(运行频率)的增加而下降。采用神经网络算法,研究基于空调送风侧参数预测变频空调性能的方法,并建立神经网络预测模型,该方法的预测误差在15%以内,可以通过控制空调运行时的送风侧参数,达到控制空调性能的目的。最后,根据以上研究成果,提出变频空调控制优化方法,提高空调在线长期运行能效。

关键词：变频空调模式识别数据挖掘能耗分析优化运行

High performance Ga N-based hybrid white micro-LEDs integrated with quantum-dots

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2020年第3期41卷 32-35页

作者： Feifan Xu Xu Cen Bin Liu Danbei Wang Tao Tao Ting Zhi Qi Wang zili xie Yugang Zhou Youdou Zheng Rong Zhang Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210023China Nanjing National Laboratory of Microstructures Nanjing UniversityNanjing 210023China College of Electronic and Optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210023China Xiamen University Xiamen 316005China

Hybrid white micro-pillar structure light emitting diodes(LEDs)have been manufacture utilizing blue micro-LEDs arrays integrated with 580 nm CIS((CuInS2-ZnS)/ZnS)core/shell quantum *** fabricated hybrid white micro-LEDs have good electrical properties,which are manifested in relatively low turn-on voltage and reverse leakage ***-quality hybrid white light emission has been demonstrated by the hybrid white micro-LEDs after a systemic optimization,in which the corresponding color coordinates are calculated to be(0.3303,0.3501)and the calculated color temperature is 5596 *** result indicates an effective way to achieve high-performance white LEDs and shows great promise in a large range of applications in the future including micro-displays,bioinstrumentation and visible light communication.

关键词： GaN hybrid white micro-LEDs quantum dots

Epitaxial Growth and Characteristics of Nonpolar a-Plane InGaN Films with Blue-Green-Red Emission and Entire In Content Range

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2022年第4期39卷 83-87页

作者： Jianguo Zhao Kai Chen Maogao Gong Wenxiao Hu Bin Liu Tao Tao Yu Yan zili xie Yuanyuan Li Jianhua Chang Xiaoxuan Wang Qiannan Cui Chunxiang Xu Rong Zhang Youdou Zheng Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China School of Electronics and Information Engineering Nanjing University of Information Science and TechnologyNanjing 210044China Xiamen University Xiamen 361000China State Key Laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096China

Nonpolar(1120)plane In_(x)Ga_(1-x)N epilayers comprising the entire In content(x)range were successfully grown on nanoscale Ga N islands by metal-organic chemical vapor *** structural and optical properties were studied *** was found that the surface morphology was gradually smoothed when x increased from 0.06 to 0.33,even though the crystalline quality was gradually declined,which was accompanied by the appearance of phase separation in the In_(x)Ga_(1-x)N *** wavelengths of 478 and 674 nm for blue and red light were achieved for x varied from 0.06 to ***,the corresponding average lifetime(τ_(1/e))of carriers for the nonpolar In Ga N film was decreased from 406 ps to 267 ps,indicating that a high-speed modulation bandwidth can be expected for nonpolar In Ga N-based light-emitting ***,the bowing coefficient(b)of the(1120)plane In Ga N was determined to be 1.91 e V for the bandgap energy as a function of x.

关键词： polar lifetime separation

High-efficiency green micro-LEDs with GaN tunnel junctions grown hybrid by PA-MBE and MOCVD

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2021年第9期9卷 1683-1688页

作者： YAOZHENG WU BIN LIU FEIFAN XU YIMENG SANG TAO TAO zili xie KE WANG XIANGQIAN XIU PENG CHEN DUNJUN CHEN HAI LU RONG ZHANG YOUDOU ZHENG Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Xiamen University Xiamen 361005China

We fabricated p-i-n tunnel junction(TJ)contacts for hole injection on c-plane green micro-light-emitting diodes(micro-LEDs)by a hybrid growth approach using plasma-assisted molecular beam epitaxy(PA-MBE)and metal–organic chemical vapor deposition(MOCVD).The TJ was formed by an MBE-grown ultra-thin unintentionally doped In Ga N polarization layer and an n^(++)∕n^(+)-GaN layer on the activated p^(++)-Ga N layer prepared by *** hybrid growth approach allowed for the realization of a steep doping interface and ultrathin depletion width for efficient inter-band *** to standard micro-LEDs,the TJ micro-LEDs showed a reduced device resistance,enhanced electroluminescence intensity,and a reduced efficiency *** size-independent J-V characteristics indicate that TJ could serve as an excellent current spreading *** these results demonstrated that hybrid TJ contacts contributed to the realization of high-performance micro-LEDs with long emission wavelengths.

关键词： MOCVD MBE GaN

Molecular basis for toxin resistance of Mesobuthus martensii voltage-gated potassium channel:insights into potassium channel evolution

在线全文

学校读者我要写书评

暂无评论

Molecular basis for toxin resistance of Mesobuthus martensii...