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Mixed-Alkali Effect on Thermal Property and Elastic Behavior in Borosilicate Glasses

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1017-1024页

作者： XIE Xianmao ZHOU Hemin KE Xuefei WANG Xiaowei WANG Yadan zhang Jiayan QIAO Ang TAO haizheng State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China AVIC Jonhon Optronic Technology Co.Ltd. Luoyang 471003China Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Zhongshan 528437China

We investigated the mixed alkali effect on the thermal properties and elastic response to temperature in the borosilicate glasses system with the composition of 70.65Si O_(2)·21.09B_(2)O_(3)·1.88Al_(2)O_(3)·(6.38-x)Li_(2)O·x Na_(2)O glasses,where x=0.00,1.595,3.19,4.785,and *** for the expected positive and negative deviations from linearity for the coefficients of thermal expansion,room temperature E and G,we observed a new mixed alkali efiect on the response of elastic moduli to *** transform infrared spectra were obtained to elucidate the possible structural origin of the mixed alkali *** work provides a valuable insight into the structural and mechanical properties of mixed-alkali borosilicate glasses.

关键词： mixed-alkali effect borosilicate glass elastic response to temperature structural origin

虚拟同步发电机在光储柴独立微电网中的控制研究

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电器与能效管理技术 2017年第3期 26-33页

作者：石荣亮张兴刘芳张海峥余勇合肥工业大学电气与自动化工程学院安徽合肥230009 阳光电源股份有限公司安徽合肥230088

作为分布式发电的关键技术,虚拟同步发电机(Virtual Synchronous Generator,VSG)在微电网中的应用得到了广泛关注。介绍了光储柴独立微电网的结构及其组成,分析了柴油发电机组的控制模型。描述了储能用三相电压源型逆变器的拓扑,阐述了... 详细信息

作为分布式发电的关键技术,虚拟同步发电机(Virtual Synchronous Generator,VSG)在微电网中的应用得到了广泛关注。介绍了光储柴独立微电网的结构及其组成,分析了柴油发电机组的控制模型。描述了储能用三相电压源型逆变器的拓扑,阐述了VSG的控制原理。结合控制方式,对独立微电网的频率响应特性进行了分析,并给出了相应的仿真结果。

关键词：虚拟同步发电机微电网柴油发电机组电压源型逆变器频率响应

Breaking the symmetry of colloidal 2D nanoplatelets:Twist induced quantum coupling

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Nano Research 2023年第7期16卷 10522-10529页

作者： Zahid Nazir Yingzhuo Lun Jialu Li Gaoling Yang Mingrui Liu Shuqi Li Gang Tang Guofeng zhang Jiawang Hong Liantuan Xiao haizheng Zhong MIIT Key Laboratory for Low-dimensional Quantum Structure and Devices School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China MIIT Key Laboratory for Low-dimensional Quantum Structure and Devices School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyCollaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuan 030006China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China

Twist provides a new degree of freedom for nanomaterial modifications,which can provide novel physical ***,colloidal two-dimensional(2D)twisted CdSe nanoplatelets(NPLs)are successfully fabricated and their morphology can change from totally flat to edge-twisted,and then to middle-twisted with prolonged reaction *** combining experiments and corresponding theoretical analyses,we have established the length-dependent relationships between the surface energy and twist,with a critical lateral dimension of 30 *** found that the defects formed during the synthesis process play a vital role in generating intense stress that develops a strong torsion tensor around the edges,resulting in edge-twisted and final middletwisted ***,due to the geometric asymmetry of twisted NPLs,the dissymmetry factor of single particle NPLs can reach up to ***,quantum coupling occurs in middle-twisted NPLs by twisting one parent NPL into two daughter NPLs,which are structurally and electronically *** work not only further deepens our understanding of the twist mechanism of 2D NPLs during colloidal synthesis,but also opens a pathway for applications using twistronics and quantum technology.

关键词： nanoplatelets CdSe twist circular dichroism quantum coupling

Detour-phased perovskite ultrathin planar lens using direct femtosecond laser writing

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Photonics Research 2022年第12期10卷 2768-2777页

作者： WENKAI YANG LIGE LIU DASHAN DONG XIN zhang HAN LIN YUNKUN WANG HONG YANG YUNAN GAO haizheng ZHONG BAOHUA JIA KEBIN SHI State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices School of Materials Sciences and EngineeringBeijing Institute of TechnologyBeijing 100081China School of Science RMIT UniversityMelbourne 3000VICAustralia Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China

Perovskite-enabled optical devices have drawn intensive interest and have been considered promising candidates for integrated optoelectronic *** one of the important photonic functions,optical phase modulation previously was demonstrated with perovskite substrate and complex refractive index engineering with laser *** we report on the new scheme of achieving efficient phase modulation by combining detour phase design with 40 nm ultrathin perovskite films composed of nanosized crystalline *** modulation was realized by binary amplitude patterning,which significantly simplifies the fabrication *** nanocrystal films exhibit significantly weak ion migration effects under femtosecond laser writing,resulting in smooth edges along the laser ablated area and high diffractive optical *** of a detour-phased perovskite ultrathin planar lens with a diameter of 150μm using femtosecond laser scribing was experimentally demonstrated.A high-performance 3D focus was observed,and the fabrication showed a high tolerance with different laser writing ***,the high-quality imaging capability of perovskite ultrathin planar lenses with a suppressed background was also demonstrated.

关键词： laser ultrathin femtosecond

Highly Penetrable Silicone Emulsion for Water-Repellent Concrete with Reserved Surface Recoatability

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Journal of Wuhan University of Technology(Materials Science) 2022年第1期37卷 58-65页

作者：张倩 zhang Guozheng YOU Jun 张群朝陶海征 State Key Laboratory of Silicate Materials for Architectures(Wuhan University of Technology) Wuhan 430070China Hubei Key Laboratory of Polymer Materials Department of Materials Science and EngineeringHubei UniversityWuhan 430062China

Highly stable and permeable silicone emulsions were prepared by encapsulating N-octyl triethoaysilane microdroplets into micelles of NH_(2)-PDMS/SiO_(2).The conversion of siloxane to sub-1μm emulsions,on one hand,endows the concrete with a highly hydrophobic internal ***,its outside surface maintains relatively high surface energy,which is beneficial for the post-coating of other *** a result,the coated concreted can simultaneously acquire water repellency and low *** utilization of water-dispersed silicone emulsions,on the other hand,is beneficial for the environmental ***,this work offered a green procedure for the comprehensive protection of concrete.

关键词： concrete silicone waterproof recoatability emulsions

PLD Preparation of GeS_6 Amorphous Film and Investigation on Its Photo-induced Darkening Phenomenon

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Journal of Wuhan University of Technology(Materials Science) 2014年第4期29卷 665-668页

作者：刘刚顾少轩 zhang Haochun zhang Ning TAO haizheng School of Electronic Information Wuhan University State Key Laboratory of Silicate Materials for Architectures(Wuhan University of Technology)

GeS6 chalcogenide amorphous fi lm was deposited on glass substrate via PLD（pulsed laser deposition） technique. The performance and structure of the fi lm was characterized by XRD（X-ray diffraction）, SEM（Scanning Electron Microscopy）, EDS（Energy Dispersive Spectroscopy）, optical transmission spectra, and Raman spectra, etc. The GeS6 amorphous fi lm was irradiated by 532 nm linearly polarized light, and its photoinduced darkening was investigated. The results showed that the GeS6 chalcogenide amorphous fi lm was smooth and compact with uniform thickness and combined with the substrate fi rmly, and its chemical composition was in consistency with the bulky target. When laser energy was fi xed, the transparence of the fi lm declined with the increase of the laser irradiation time. Obvious photo-induced darkening and relaxation phenomenon of the fi lm after laser irradiation were observed in this investigation.

关键词： GeS_6 chalcogenide amorphous film pulsed laser deposition photo darkening

Houshiheisan compound prescription protects neurovascular units after cerebral ischemia

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Neural Regeneration Research 2014年第7期9卷 741-748页

作者： haizheng Wang Lei Wang Nan zhang Qi zhang Hui Zhao Qiuxia zhang School of Traditional Chinese Medicine Capital Medical University

Houshiheisan is composed of wind-dispelling （chrysanthemun fower, divaricate saposhnikovia root, Manchurian wild ginger, cassia twig, Szechwan lovage rhizome, and platycodon root） and deficiency-nourishing （ginseng, Chinese angelica, large-head atractylodes rhizome, Indian bread, and zingiber） drugs. In this study, we assumed these drugs have protective effects against cerebral ischemia, on neurovascular units. Houshiheisan was intragastrically administered in a rat model of focal cerebral ischemia. Hematoxylin-eosin staining, transmission electron microscopy, immu- nofluorescence staining, and western blot assays showed that Houshiheisan reduced pathological injury to the ischemic penumbra, protected neurovascular units, visibly up-regtflated neuronal nuclear antigen expression, and down-regulated amyloid precursor protein and amyloid-[3 42 expression. Wind-dispelling and deficiency-nourishing drugs maintained NeuN expression to varying degrees, but did not affect amyloid precursor protein or amyloid-~ 42 expression in the ischemic penumbra. Our results suggest that the compound prescription Houshiheisan effectively suppresses abnormal amyloid precursor protein accumulation, reduces amyloid substance depo- sition, maintains stabilization of the internal environment of neurovascular units, and minimizes injury to neurovascular units in the ischemic penumbra.

关键词： nerve regeneration brain injury cerebral ischemia Houshiheisan wind-dispelling dru-gs deficiency-nourishing drugs neurovascular units amyloid precursor protein jS-amyloid neuronalnuclear antigen NSFC grant neural regeneration

Upconversion luminescence properties of Er^(3+) doped GeS_2-Ga_2S_3-KCl chalcohalide glasses

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Rare Metals 2011年第1期30卷 18-21页

作者： zhang Jihong TAO haizheng ZHAO Xiujian Key Laboratory of Silicate Materials Science and Engineering（Ministry of Education） Wuhan University of TechnologyWuhan 430070China

Er^3＋ ions doped chalcohalide glasses with the composition of 56GeS2-24Ga2S3-20KCl were fabricated by a melt-quenching *** 800 nm laser excitation,strong green emissions centered at 525 nm and 550 nm and weak red emission centered at 660 nm were observed,which were assigned to ^2H11/2→^4I15/2,^4S3/2→^4I15/2,and ^4F9/2→^4I15/2 transitions,*** intensity reached maximum when the Er^3＋ ions concentration was 0.1 mol%.The possible upconversion luminescence mechanism was proposed from the discussion on the above results as well as the results of lifetimes of the metastable ^4I13/2 level and local environment of Er^3＋ *** is found that chalcohalide glass can be good host materials for upconversion luminescence.

关键词： amorphous materials glass rare earths luminescence doping

Broadband perovskite quantum dot spectrometer beyond human visual resolution

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Light(Science & Applications) 2020年第1期9卷 1329-1337页

作者： Xiaoxiu Zhu Liheng Bian Hao Fu Lingxue Wang Bingsuo Zou Qionghai Dai Jun zhang haizheng Zhong MIIT Key Laboratory for Low-dimensional Quantum Structure and Devices Beijing Institute of Technology100081 BeijingChina School of Materials Science&Engineering Beijing Institute of Technology100081 BeijingChina School of Information and Electronics&Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology100081 BeijingChina Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems School of Optics and PhotonicsBeijing Institute of Technology100081 BeijingChina Department of Automation&School of Information Science and Technology Tsinghua University100086 BeijingChina Beijing National Research Center for Information Science and Technology 100086 BeijingChina

The quantum dot spectrometer,fabricated by integrating different quantum dots with an image sensor to reconstruct the target spectrum from spectral-coupled measurements,is an emerging and promising hyperspectrometry technology with high resolution and a compact *** spectral resolution and spectral range of quantum dot spectrometers have been limited by the spectral variety of the available quantum dots and the robustness of algorithmic ***,the spectrometer integration of quantum dots also suffers from inherent photoluminescence emission and poor batch-to-batch *** this work,we developed nonemissive in situ fabricated MA_(3)Bi_(2)X_(9) and Cs_(2)SnX_(6)(MA=CH_(3)NH_(3);X=Cl,Br,I)perovskite-quantum-dot-embedded films(PQDFs)with precisely tunable transmittance spectra for quantum dot spectrometer *** resulting PQDFs contain in situ fabricated perovskite nanocrystals with homogenous dispersion in a polymeric matrix,giving them advantageous features such as high transmittance efficiency and good batch-to-batch *** integrating a filter array of 361 kinds of PQDFs with a silicon-based photodetector array,we successfully demonstrated the construction of a perovskite quantum dot spectrometer combined with a compressive-sensing-based total-variation optimization algorithm.A spectral resolution of ~1.6 nm was achieved in the broadband of 250-1000 *** performance of the perovskite quantum dot spectrometer is well beyond that of human eyes in terms of both the spectral range and spectral *** advancement will not only pave the way for using quantum dot spectrometers for practical applications but also significantly impact the development of artificial intelligence products,clinical treatment equipment,scientific instruments,etc.

关键词： quantum perovskite batch