Donor-Acceptor Typed AIE Luminogens with Near-infrared Emission for Super-resolution Imaging

Aggregation-induced emission(AIE)luminogens(AIEgens)with high brightness in aggregates exhibit great potentials in biological imaging,but these AIEgens are seldom applied in super-resolution biological imaging,especially in the imaging by using the structural illumination microscope(SIM).Based on this consideration,we synthesized the donor-acceptor typed AIEgen of DTPA-BTN,which not only owns high brightness in the near-infrared(NIR)emission region from 600 nm to 1000 nm(photoluminescence quantum yield,PLQYs=11.35%),but also displays excellent photo-stability.In addition,AIE nanoparticles based on 4,7-ditriphenylamine-[1,2,5]-thiadiazolo[3,4-c]pyridine(DTPA-BTN)were also prepared with highly emissive features and excellent biocompatibility.Finally,the developed DTPA-BTN-based AIE nanoparticles were applied in the super-resolution cellular imaging via SIM,where much smaller full width at half-maximum values and high signal to noise ratios were obtained,indicating the superior imaging resolution.The results here imply that highly emissive AIEgens or AIE nanoparticles can be promising imaging agents for super-resolution imaging via SIM.     

6英寸低位错锗单晶生长热场设计

锗片作为衬底材料已在空间太阳电池领域得到广泛的应用,新型锗基空间太阳能电池对锗片的需求由4英寸(1英寸=2.54 cm)提高到6英寸后,低位错锗单晶的生长难度增大.本文设计开发了一种适用于直拉法生长大尺寸、低位错锗单晶的双加热器热场系统,模拟研究了不同形状主加热器的热场分布,从而得到最优的热场环境.研究发现:渐变长度为...     

旋转构件变形的完备性论证与分析

问题 处于重力场中的工程机械主机上安装的旋转部件如图 1 所示:四根质量均为 m、长度均为 L的杆件以铰接构成菱形,竖直固定主轴与其一条对角线重合,菱形最上方的点被锁定而最下方的点是一个可在主轴上自由滑动的轴套且此两点间连接有一根刚度系数为k、自然长度为2L的螺绕弹簧(密布缠绕在主轴上).     

BILINEAR SPECTRAL MULTIPLIERS ON HEISENBERG GROUPS

As we know,thus far,there has appeared no definition of bilinear spectral mul-tipliers on Heisenberg groups.In this article,we present one reasonable definition...     

免疫分析技术在农药残留分析中的研究进展及在中药中的应用展望

中药材的农药残留问题一直是人们关注的重点,免疫分析技术作为一项特异性强、灵敏度高的快速分析检测技术,在实现中药材农药残留快速筛查方面发挥着重要作用.该文结合近年免疫分析相关研究进展,对不同的免疫分析技术在中药农药残留分析方面的应用、技术优势以及局限性进行总结分析,并对免疫分析技术的发展前景进行了展望,对免疫分析技术在农...     

重离子治癌引出BUMP电源控制器设计

引出凸轨(BUMP)电源是负责医用重离子加速器束流引出的关键设备,其电流上升的同步性影响束流的引出效率,而电流波形的多样性与治疗模式和治疗精度密切相关.要在凸轨磁铁(0.2～0.4 mH)上产生1～5 ms上升且精确同步的励磁电流,并确保电流的跟踪性和波形的多样性,采用了实时调整强励电压及基于特征参数的电流波形控制方法...     

函数一致连续的一个充要条件

给出了一元函数在区间上一致连续的一个充分必要条件,举例说明了使用它来讨论函数在区间上的一致连续性将更为简单.     

液液萃取-气相色谱-质谱法同时测定水中46种半挥发性有机物

半挥发性有机物主要包括多环芳烃类(PAHs)、邻苯二甲酸酯类(PAEs)、有机氯农药类(OCPs)和硝基苯类(NBs)等化合物,这些物质多具有致癌、致畸、致突变作用,以及内分泌干扰效应.因此,快速准确测定水中半挥发性有机物非常重要,目前国内尚无水中半挥发性有机物的检测标准.该研究从氮吹温度、水样pH值和萃取时间3个方面...     

关于吸收式碳捕集热力学机制的探索

热再生吸收式碳捕集的传统认识难以揭示其热力学机制,一种新的认识是"热-化学能"转换中存在中间能量形式.本文从热力学碳泵概念出发,对吸收式碳捕集理想系统进行了解耦,其可视为"热机-碳泵"的热力学组合,探索了极限效率的表达,并采用第二定律效率作为评价参数对已有中试试验系统进行了性能水平探索.结果表明,理想循环性能系数仅取决...     

Design and Construction of 3D Porous Na3V2(PO4)3/C as High Performance Cathode for Sodium Ion Batteries

An easy and delicate approach using cheap carbon source as conductive materials to construct 3D sequential porous structural Na3V2(PO4)3/C(NVP/C)with high performance for cathode materials of sodium ion battery is highly desired.In this paper,the NVP/C with 3D sequential porous structure is constructed by a delicate approach named as“cooking porridge”including evaporation and calcination stages.Especially,during evaporation,the viscosity of NVP/C precursor is optimized by controlling the adding quantity of citric acid,thus leading to a 3D sequential porous structure with a high specific surface area.Furthermore,the NVP/C with a 3D sequential porous structure enables the electrolyte to interior easily,providing more active sites for redox reaction and shortening the diffusion path of electron and sodium ion.Therefore,benefited from its unique structure,as cathode material of sodium ion batteries,the 3D sequential porous structural NVP/C exhibits high specific capacities(115.7,88.9 and 74.4 mA·h/g at current rates of 1,20 and 50 C,respectively)and excellent cycling stability(107.5 and 80.4 mA·h/g are remained at a current density of 1 C after 500 cycles and at a current density of 20 C after 2200 cycles,respectively).