Metal-organic framework single crystals with ordered macro-micropores

正With the support by the National Natural Science Foundation of China,a collaborative study by the research groups led by Prof.Li YingWei(李映伟)from the South China University of Technology,and Prof.Chen BangLin(陈邦林)from the University of Texas at San Antonio successfully demonstrates the first example of ordered macro-microporous metal-organic framework single crystals,which was published     

PST TiAl single crystals for high temperature applications

<正>Recently,the research team led by Prof.Chen Guang(陈光)at the Engineering Research Center of Materials Behavior and Design,Ministry of Education,Nanjing University of Science and Technology,successfully manufactured a new kind of high-temperature polysynthetic twinned(PST)TiAl single crystal     

Novel whispering-gallery microsensor for single nanoparticle detection

<正>Ultrasensitive detection of nanoscale particles has applications in important fields ranging from environmental monitoring to analysis of viral structures.However,it remains extremely difficult due to ultralow polarizability of small-sized,low index particles.With the support by the National Natural Science Foundation of China,the research group led by Prof.Xiao Yunfeng(肖云峰)from the State Key Laboratory     

巨压电弛豫铁电单晶及其在医用超声换能器中的应用

压电材料是一类非常重要的多功能材料。它可以实现机械能和电能之间的相互转换,在机电器件和电声领域有广泛的应用。基于宽频带超声波换能器、高灵敏度传感器和大应变执行器等压电器件的发展需求,迫切地需要研发出具有更大压电应变常数和更高机电耦合系数的压电材料。弛豫铁电单晶铌镁酸铅-钛酸铅(化学分子式(1-x)Pb(Mg_(1/3)Nb_(2/3))O_3-xPbTiO_3简称PMN-xPT或PMN-PT)及其同类单晶(简称弛豫铁电单晶)的发现恰逢其时,它们所具有的巨压电性和极高的机电耦合系数使得很多机电器件的性能有了一次大幅度的改进。例如:PMN-33%PT单晶的压电常数d_(33)高达2800 pC/N,是通用的压电材料PZT压电陶瓷的5倍,其机电耦合系数k_(33)也高达94%,而最好的PZT的机电耦合系数k_(33)也只能达到70%。本文系统地介绍了弛豫铁电单晶材料及其在医用超声换能器方面的应用进展。     

Novel scheme of manipulating topological physics by using a single degenerate cavity

正Subject Code:F05 With the support by the National Natural Science Foundation of China,the research group from the Key Lab of Quantum Information(CAS)led by Prof.Guo Guangcan(郭光灿)at the University of Science and Technology of China proposed a new routine to manipulate topological physics using only a single optical     

Giant piezoelectricity of Sm-doped Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3 single crystals

正The Sm-doped Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3 (Sm-PMN-PT)single crystals were successfully grown and systematically investigated with the support of the National Natural Science Foundation of China.The     

Ultrahigh thermoelectric performance in mosaic crystals

<正>With the support by the National Natural Science Foundation of China and National Basic Research Program of China,Prof.Chen Lidong and Shi Xun's laboratory at the State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,reported high thermoelectric performance in solid solution Cu2(S,Te)with its microstructure hav-     

掺铁Pb(Mg1/3Nb2/3)O3-0.26PbTiO3单晶的生长及性能研究

采用改进的布里奇曼法(坩埚下降法)生长了掺0.3%(摩尔分数) Fe的0.74Pb(Mg_1/3Nb_2/3)O₃- 0.26PbTiO₃(PMN-0.26PT)单晶. 系统研究了该单晶的生长、结构、介电和热释电性能, 并与纯PMN-0.26PT单晶进行了比较. 研究发现, 掺杂晶体的畴宽度明显大于纯晶体; 单晶的矫顽场和剩余极化都明显增大; 在居里温度以下, 介温谱上出现两个大的异常, 温度较纯晶体更接近于室温. 实验结果表明, 掺杂离子通过缺陷偶极对2Fe′_Ti -V^••_o对畴起钉扎作用, 增加了晶体的矫顽场, 降低了晶体的介电常数和介电损耗, 提高了晶体的探测优值, 并保持高的电压响应优值, 这对PMN-PT单晶的实际应用非常有利. 这种高性能的热释电和压电单晶的掺杂改性研究将会更好地增进对其高性能本质的理解.     

Colossal barocaloric effects discovered in plastic crystals

<正>Partially supported by the National Natural Science Foundation of China,Profs.Li Bing(李昺),Zhang ZhiDong(张志东),and Ren WeiJun(任卫军)from the Institute of Metal Research,Chinese Academy of     

超临界流体技术制备有序材料研究进展

超临界流体由于其特殊的性质, 是制备在纳米及微米尺度范围有序结构的一种良好的溶剂, 其中包含超临界二氧化碳. 超临界流体根据其特殊性, 可扩展“自上而下”的方法, 包括沉积法、清洁法、刻蚀法和表面修饰法, 从而达到最精细的雕琢. 当采用“自下而上”的方法时, 由于二氧化碳分子与聚合物的相互作用, 尤其是与嵌段共聚物模板的作用, 可促使完全的结构精细化, 因此超临界流体中纳米粒子和纳米线的合成近年来发展迅速, 由此制备的有序结构材料在微电子、探测技术、能量转换等领域显示了令人欣喜的应用前景. 本文就有关领域, 对超临界流体技术的基础及其应用进行了评述.     

Second-order topology and multidimensional topological transitions in sonic crystals

<正>With the support by the National Natural Science Foundation of China,the research team led by Prof.Lu MingHui(卢明辉)and Prof.Chen YanFeng (陈延峰)at the National Laboratory of Solid State     

基于自组装胶体晶体构筑有序微结构

有关胶体晶体自组装以及以胶体晶体为模板制备有序图案化微结构方面的研究, 由于方法简便、结构多样、重复性好等优点, 近年来受到越来越多的关注. 本文系统总结了我们在胶体微球和胶体晶体领域开展的研究工作, 主要包括: 无机或聚合物胶体微球的设计制备、纳米复合及功能化; 结合聚合物材料可溶涨、可拉伸、热形变等特性构筑图案化胶体晶体、非球形对称胶体晶体、非紧密堆积胶体晶体等特殊结构; 以胶体晶体为模板制备三维大孔骨架、纳米环、纳米碗阵列等有序微结构等.     

Valley photonic crystals for control of spin and topology

正Subject Code:A04With the support by the National Natural Science Foundation of China,the research team led by Prof.Dong Jianwen(董建文)at the State Key Laboratory of Optoelectronic Materials and TechnologiesSchool of Physics,Sun Yat-sen University,discovered the control of spin and topology in valley photonic crystals,which was published in Nature Materials(2017,DOI:10.1038/NMAT4087).     

High thermoelectric performance in low-cost SnS0.91Se0.09 crystals

<正>With the support of the National Natural Science Foundation of China,the research group led by Prof. Zhao Li Dong (赵立东) at the School of Materials Science and Engineering,Beihang University,has made new progress in thermoelectric research,the low-cost and high thermoelectric performance Sn S0. 91Se0. 09crystals,which was published in Science (2019,365:1418—1424).     

Observation of topological valley transport of sound in sonic crystals

正Subject Code:A04 Supported by the National Natural Science Foundation of China,a research group from Wuhan University,led by Profs.Liu Zhengyou(刘正猷)and Qiu Chunyin(邱春印),demonstrated the topological valley transport of sound in sonic crystals,which was published in Nature Physics(2017,13:369—374).     

Novel hydrogel microparticles as vaccine adjuvant

<正>With the support by the National Natural Science Foundation of China,the Chinese Academy of Sciences and Beijing Natural Science Foundation,Prof.Ma Guanghui's laboratory at the Institute of Process Engineering,Chinese Academy of Sciences,reported the preparation of novel hydrogel microparticles and their application as vaccine adjuvant,which was published in Advanced Healthcare Materials(2014,3(5):     

细菌纤维素:一种环境友好的纳米材料

纳米科学的产生堪称科学史上的一次革命，纳米科学的发展又为化学、物理学、材料学、生物学及仿生学学科的交叉发展提供了新的机遇。由于纳米材料所见有的独特性质段新规律的发现，近年来这一领域形成了新的交叉学科研究热点。     

单分子体系发射光子统计

基于最近发展的单分子体系光子发射产生函数(generating function)方法, 具体讨论了单分子体系发射光子统计的有关问题. 从统计的意义上讲, 所引进的产生函数可以认为是单分子体系发射光子系综的广义配分函数, 并对相关问题作了简要的讨论.     

Echo in a single vibrationally excited molecule

正With partial support from the National Natural Science Foundation of China,the joint research team led by Prof.Wu Jian (吴健)at the State Key Laboratory of Precision Spectroscopy,East China Normal University,and Prof.Ilya Averbukh together with Prof.Yehiam Prior of the Chemical and Biological Physics Department at the Weizmann Institute of Science(Israel)and research students Qiang JunJie(强     

一种新的核蛋白CTCF-多功能转录调节物

CTCF是进化上高度保守的含有11-锌指(ZF)模体的DNA-结合核蛋白.它通过其11-ZFs与～50 bp DNA靶位点的结合形成不同的CTCF-DNA复合体,产生正常基因调节功能,包括转录抑制和活化、激素调节的基因沉默、甲基化-依赖的染色质绝缘以及调节亲本印迹(parental imprinting)位点.