A Useful Technique to Fabricate Fan-out Grating

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｆａｎｏｕｔｇｒａｔｉｎｇｗａｓｗｉｄｅｌｙｕｓｅｄｉｎｏｐｔｉｃａｌｉｎｆｏｒｍａｔｉｏｎｐｒｏｃｅｓｉｎｇｓｙｓｔｅｍ，ｏｐｔｉｃａｌｉｎｔｅｒｃｏｎｎｅｃｔｉｏｎ［１］，ｌａｓｅｒｄｅｍｏｎｓｔｒａｔｉｏｎａｎ...     

Bi_4Ti_3O_(12)铁电薄膜的相变研究

用变温X射线及热分析等方法研究Bi_4Ti_3O_12铁电薄膜的相变,结果表明,在温度为350~445℃之间,薄膜经历由烧绿石相向钙钛矿相的结构相变,在670℃附近,薄膜由铁电相向顺电相转变;该相变是由于晶格畸变量b/a随温度上升连续减小,使得薄膜晶体对称性发生改变引起,在相变点附近未观察到潜热的产生。     

Binary Pd–Polyoxometalates and Isolation of a Ternary Pd–V–Polyoxomolybdate Active Species for Selective Aerobic Oxidation of Alcohols

Binary Pd–polyoxometalates [Pd(dpa)₂]₃[PW₁₂O₄₀]₂ ? 12 DMSO ( 2 ), [Pd(dpa)₂]₃[PMo₁₂O₄₀]₂ ? 12 DMSO ? 2 H₂O ( 3 ), and [Pd(dpa)(DMSO)₂]₂[HPMo₁₀V₂O₄₀] ? 4 DMSO ( 4 ) were synthesized by reaction of [Pd(dpa)(OAc)₂] ? 2 H₂O ( 1 ; dpa=2,2′‐dipyridylamine) with three Keggin‐type polyoxometalates and fully characterized by single‐crystal and powder XRD analyses, IR spectroscopy, and elemental analyses. The synthesis is facile and straightforward, and the complicated ligand‐modification procedure often used in the traditional charge‐transfer method can be omitted. In 2 – 4 , Pd complexes and polyoxometalate anions are coupled through electrostatic interaction. Compound 4 is more active than the other three compounds in the selective aerobic oxidation of alcohols at ambient pressure. Interestingly, during catalytic recycling of compound 4 , unprecedented ternary Pd–V–polyoxometalate [Pd(dpa)₂{VO(DMSO)₅}₂][PMo₁₂O₄₀]₂ ? 4 DMSO ( 5 ), which was captured and characterized by single‐crystal XRD, proved to be the true active species and showed high catalytic activity for the selective aerobic oxidation of aromatic alcohols (98.1–99.8 % conversion, 91.5–99.1 % selectivity). Moreover, on the basis of control experiments and EPR and UV/Vis spectra, a plausible reaction mechanism for the oxidation of alcohols catalyzed by 5 was proposed.     

Amperometric biosensor for bisphenol A based on a glassy carbon electrode modified with a nanocomposite made from polylysine, single walled carbon nanotubes and tyrosinase

We have prepared a nanocomposite consisting of single-walled carbon nanotubes and polylysine. It was characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, and by UV/vis and FTIR spectroscopy. Tyrosinase was covalently immobilized on the nanocomposite, and the resulting bioconjugate deposited on a glassy carbon electrode to form a biosensor for bisphenol A. The biosensor was characterized by scanning electron microscopy and electrochemical impedance spectroscopy. Under optimized experimental conditions, the biosensor gives a linear response to bisphenol A in the 4.00 nM to 11.5 μM concentration range. Its sensitivity is 788 mA M^?1 cm^?2, and the lower detection limit is 0.97 nM (at an S/N of 3). The biosensor shows good repeatability, reproducibility and long-term stability. In a preliminary practical application, it was successfully applied to the determination of bisphenol A in leachates of plastic spoons.

适用于中、小动物的迅速减压舱的研制及其实验研究

研制一种新型的、适用于中、小动物的迅速减压舱。通过１３８ 次空载实验和３６ 例动物（ 家兔） 实验发现:该装置的减压幅度和减压时间可调，减压幅度最大可达９８０６６５Ｐａ，减压时间为７～３３６ｍｓ；减压时间与节流面积近似呈反比关系，与减压幅度呈负相关；减压精度较高，可产生不同程度的肺损伤，伤情重复性较好；能模拟多种迅速减压环境，尤其是减压速率很快的减压环境，可为冲击伤和减压损伤的发生机制及救治研究提供重要的致伤模型和实验手段。     

重离子治癌终端的束流强度及剂量监测系统

 为实现重离子肿瘤治疗临床实验中对照射束流状态的实时监测,研制了束流强度及剂量监测系统,包括积分电离室、后续电流频率转换电路及LabVIEW数据获取处理三部分。利用闪烁体探测器和标准剂量计测试了系统的线性响应和得到剂量的准确性,结果表明：系统在束流临床照射流强范围内的线性响应好于90%,其实时反馈的临床照射剂量偏差小于5%。同时束流强度及剂量监测系统与安全控制系统相结合,保证束流照射状态满足临床照射的安全要求。     

Recording the Reaction Process of Loop‐Mediated Isothermal Amplification (LAMP) by Monitoring the Voltammetric Response of 2′‐Deoxyguanosine 5′‐Triphosphate

We describe here a novel strategy for recording the reaction process of loop‐mediated isothermal amplification (LAMP) by monitoring the voltammetric response of 2′‐deoxyguanosine 5′‐triphosphate (dGTP). Unlike the other three kinds of reactive substrates for DNA synthesis in LAMP reaction, dGTP exhibits sensitive voltammetric response at the carbon nanotube array electrode. When the LAMP reaction occurs, the concentration of dGTP decreases accordingly, bringing forth the decrease of the anodic peak current (i_pa). In inversion, the decrease of the i_pa of dGTP was used to characterize the reaction process of LAMP. The relationships among the LAMP reaction time, the initial quantity of template DNA and the value change of the i_pa were studied. The results indicate that the protocol integrated LAMP and voltammetric techniques can be used for not only qualitative gene discrimination but also quantitative gene assay in a wide range. The malB gene extracted from common strains of Escherichia coli cells was tested as a model. The detecting results of LAMPs obtained by voltammetric method were in good agreement with those by optical‐based methods (gel electrophoresis and fluorescent dye).     

Preparation of polymer–rare earth complex using salicylic acid-containing polystyrene and its fluorescence emission property

Salicylic acid (SA) was first bonded onto the side chains of polystyrene (PS), obtaining functional macromolecule SAPS. Using the salicylic acid-containing polystyrene as a macromolecular ligand, a polymer–rare earth complex, SAPS–Eu(III), was prepared. The structure of SAPS–Eu(III) was characterized, and the fluorescence properties of SAPS–Eu(III) were mainly investigated. The experimental results show that the complex SAPS–Eu(III) has fine chemical stability because of the bidentate chelating effect of salicylic acid ligand. More important, the ligand SA on the side chains of PS can strongly sensitize the fluorescence emission of the center ion, Eu³⁺ ion, and it enables the complex SAPS–Eu(III) to produce the apparent “Antenna Effect”. In the diluted solution of the functional macromolecule SAPS, the formed complex SAPS–Eu(III) belongs to an intramolecular complex, or an intrachain complex. For the binary intramolecular complex SAPS–Eu(III), the apparent saturated coordination number of SA of SAPS towards Eu³⁺ ion is equal to 10, and here the binary intrachain complex SAPS–Eu(III) has the strongest fluorescence emission. On this basis, small-molecule 1,10-phenanthroline (Phen) acting as a co-ligand is added and the ternary complex SAPS–Eu(III)–Phen will be formed. As long as a small amount of Phen is added (in the molar ratio 1:1 (n(Phen):n(Eu))), the coordination of the two kinds of ligands, SA of SAPS and Phen, to Eu³⁺ ion will reach complete saturation, and here the fluorescence emission of the ternary complex will be further enhanced via the complementary coordination effect in comparison with that of the binary complex SAPS–Eu(III).     

Sensitive Determination of Trace Pb2+ in Seawater Using Columnar Glassy Carbon Electrode

We herein report a mercury‐free approach for the sensitive determination of trace Pb²⁺ in seawater using differential pulse stripping voltammetric (DPSV) method with a novel columnar glassy carbon electrode (CGCE). Compared with the conventional disk glassy carbon electrode with the same diameter, it has much larger electrochemical area (0.627 ± 0.003 cm²). The CGCE shows good accumulation ability and consequently acceptable behavior which makes it suitable as a working electrode in the DPSV determination of Pb2+ with the great advantage of the avoidance of harmful mercury. Using acidified artificial seawater as supporting electrolyte, there was a good linear relationship between the peak currents and the concentration of Pb²⁺ in the range of 0.6～140.0 μg L^‐1 with a detection limit of 0.3 μg/L (S/N = 3) when the accumulation time was 300 s. The method was employed to determine trace levels of Pb²⁺ in real seawater samples successfully.