纳米AgBr/PMMA光致变色杂化材料制备与表征

采用本体聚合法制备了纳米AgBr/PMMA(聚甲基丙烯酸甲酯)光致变色杂化材料.XRD分析表明,纳米AgBr/PMMA杂化材料是无定形的.SEM分析表明,AgBr含量不同,杂化材料的断面形貌明显不同,随AgBr含量的增加,杂化材料由韧性断裂向脆性断裂转变.EDS面分析表明,Ag、Br元素在杂化材料中均匀分布.所制备的纳米AgBr/PMMA杂化材料具有一定的光致变色效应.

电流型氨气传感器的研究

通过循环伏安法、线性扫描等技术,比较了NH3在Pd,Pt,Rh,Au等不同光滑电极表面的电化学氧化行为.结果表明:Pt对NH3具有较高的催化活性,且催化产物选择性好.以化学还原法制备的超细Pt粉作为传感器工作电极催化剂,选择中性电解质作为传感器支持介质,通过工艺的改进与添加保水材料,制备出的NH3传感器工作性能稳定,测试结果准确性、重现性好,灵敏度高,传感器响应信号与被测气体浓度呈现良好的线性关系.

有源层厚度对CuPc-OTFT器件性能的影响

研究了不同厚度有源层的顶电极CuPc OTFT器件的电学特性。发现器件的性能与有源层厚度有依赖关系,其中,有源层厚度为20nm的器件性能最好。在有源层厚度大于20nm时,有源层厚度的增大不但分去一部分栅电压而且还增大了源、漏电极的接触电阻,从而不利于器件性能的提高。但当有源层厚度小于20nm以后器件的性能开始降低。我们认为当有源层厚度降低到一定程度时,有源层上表面的表面态会使有机材料的隙态浓度增加从而对沟道载流子迁移率产生不良影响以及使器件的阈值电压增大。

A novel method to construct a third-generation biosensor: self-assembling gold nanoparticles on thiol-functionalized poly(styrene-co-acrylic acid) nanospheres

A novel method for fabrication of horseradish peroxidase (HRP) biosensor has been developed by self-assembling gold nanoparticles on thiol-functionalized poly(styrene-co-acrylic acid) (St-co-AA) nanospheres. At first, a cleaned gold electrode was immersed in thiol-functionalized poly(St-co-AA) nanosphere latex prepared by emulsifier-free emulsion polymerization of St with AA and function with dithioglycol to assemble the nanospheres, then gold nanoparticles were chemisorbed onto the thiol groups. Finally, horseradish peroxi- dase was immobilized on the surface of the gold nanoparticles. The sensor displayed an excellent electrocatalytical response to reduction of H2O2 without the aid of an electron mediator. The sensor was highly sensitive to hydrogen peroxide with a detection limit of 4.0 mumol l(-1), and the linear range was from 10.0 mumol l(-1) to 7.0 mmol l(-1). The biosensor retained more than 97.8% of its original activity after 60 days of use. Moreover, the Studied biosensor exhibited good current repeatability and good fabrication reproducibility.

Application of impedance spectroscopy for monitoring colloid Au-enhanced antibody immobilization and antibody-antigen reactions

We used colloidal An to enhance the amount of antibody immobilized on a gold electrode and ultimately monitored the interaction of antigen-antibody by impedance measurement. Self-assembly of 6 nm (diameter) colloidal An onto the self-assembled monolayers (SAMs) of 4-aminothiophenol modified gold electrode resulted in an easier attachment of antibody. The redox reactions of [Fe(CN)(6)](4-)/[Fe(CN)(6)](3-) on the gold surface were blocked due to the procedures of self-assembly of 4-aminothiophenol and antibody immobilization, which were investigated by cyclic voltammetry and impedance spectroscopy. The interaction of antigen with grafted antibody recognition layers was carried out by soaking the modified electrode into a phosphate buffer at pH 7.4 with various concentrations of antigen at 37 degreesC for 30 min. The antibody recognition layers and their interactions with various concentrations of antigen could be detected by measurements of the impedance change. The results show that this method has good correlation for detection of Hepatitis B virus surface antigen in the range of 0.5-200 mug/l and a detection limit of about 50 ng/l.

塞隆骨与虎骨中矿物质元素的比较

目的对比分析国家一类动物药塞隆骨和禁用传统中药材虎骨中的19种矿物质元素的含量.方法骨骼样品经灰化或消解处理后,采用原子吸收光谱法、氢化物原子荧光光谱法、催化极谱法等分析方法测定矿物质元素.结果两种动物骨骼中元素含量差异显著,塞隆骨11种元素高于虎骨,特别是Cu、Zn、Fe、Mn、Se等生命活动必需微量元素塞隆骨极为显著地高于虎骨,而组成骨骼的主要成分Ca、P则为虎骨高于塞隆骨.矿物质元素在头骨、脊梁骨和腿骨中分布非常不平衡,多数元素以头骨中分布最为丰富,而5种常量元素Ca,P,Na,Mg,K的含量为腿骨＞头骨＞脊梁骨.骨骼中主要成分Ca和P的存在形式主要为羟磷灰石Ca10(PO4)6(OH)2.结论塞隆骨骨骼中的矿物质元素与虎骨有可比性,必需微量元素塞隆骨明显优于虎骨.

东濮断陷湖盆兰聊陡坡带扇体形成机制及成藏规律研究

陆相断陷湖盆陡坡带由于具有特殊的构造背景,在下降盘易发育各种类型的砂砾岩扇体,且具有很好的含油气前景,近几年各大油田也都将其作为增储上产的重要勘探领域.但由于这些扇体一般都具有较大的隐蔽性,而且控制影响因素复杂,尤其是对于为数较多的受高角度大断层控制的断陷湖盆,在陡坡带进行砂砾岩扇体的勘探具有更大的风险性.本文运用层序地层学、地震精细描述等勘探新理论、新技术和新方法,结合生产实际,对东濮凹陷高角度兰聊陡坡带砂砾岩扇体形成机制及成藏规律进行了多学科综合研究,查明了扇体的成因机制、控制因素、分布规律,并进一步探讨了扇体成藏机理和成藏规律,为下一步勘探指明了有利方向和钻探目标,期望为国内外同类盆地陡坡带油气资源的勘探也提供了一定的借鉴.

塔里木盆地中原探区速度场研究方法

利用自行编程设计的速度场算法，建立了塔里木盆地中原探区的速度场模型，并应用于油气勘探生产之中．在塔中地区，影响平均速度的主要因素是地层埋深和火成岩的岩性．在巴楚地区，影响平均速度变化的主要因素是大的构造运动形成的多角度不整合界面和断距较大的断层．总结出了一套适合地质复杂地区速度场建立的方法；利用该速度场进行变速成图，能够提高成图精度、排除假构造、发现新的圈闭、减小勘探风险，落实发现了一批圈闭，提供探井多口，实现了油气勘探的突破。