Materials Literature
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This thesis describes the synthesis and characterisation of conjugated materials, and their optoelectronic applications. The first chapter introduces the concept of solar cells and describes the most common types of solar cells used nowadays, including examples of some of the best performing materials. The second chap…
In this present work, CTH and BCTH crystals have been prepared by gel technique by using single diffusion method at room temperature. The as grown crystals were characterized by using XRD, FT-IR, UV, TG / DTA and Micro hardness studies. X-ray powder diffraction results analyzed by using suitable software suggest that…
Congreso celebrado en la Escuela de Arquitectura de la Universidad de Sevilla desde el 24 hasta el 26 de junio de 2015.
The analysis of the surface of the quartz plates after various treatments. Quartz crystal elements have been previously processed by mechanical polishing using abrasive slurry and chemical etching. Suspension of abrasive ceria serves micropowder, chemical etching is performed using hydrofluoric acid. Investigation of…
In this investigation we use two complementary techniques to distinguish between superparamagnetic blocking (SPB) and superspin-glass (SSG) freezing phenomena in magnetite nanoparticles. While these manifestations of the superspin dynamics are fundamentally different, they have similar "signatures", especially in dc-m…
采用共沉淀法结合高温固相法制备Li1.07（Ni0.4Mn0.53）1-xAlx O2正极材料,利用SEM,XRD对所得试样的形貌和晶体结构进行表征,并研究材料的电化学性能.结果表明,少量Al的掺入减小材料的颗粒尺寸,降低材料的放电比容量,但可以提高材料的循环稳定性和倍率性能.其中x=0.01时所得试样在25℃,2.75--4.2 V,0.5 C倍率下的首次放电比容量为125.1 m Ah/g,100次循环后的容量保持率达到99.5%.此外,掺入适量Al后可以降低Li＋在材料中的电荷传递阻抗,改善材料的低温放电性能.
三环己基氢氧化锡分别与辛二酸和壬二酸进行甲醇溶剂热反应,合成了2个双（三环已基锡）二元酸酯（CH2）n（CO2Sn Cy3）2[（n：6（1）,7（2）],并用IR、1H和13C NMR、元素分析和X射线单晶衍射表征结构。化合物1、2均属单斜晶系,空间群分别为P21/n和P21/c,在化合物的晶体中,1通过Sn-O共价键,2通过Sn-O和Sn…O弱作用,分别形成了四锡核30元（1）和32元（2）二维大环网状结构。化合物1、2对人癌细胞Colo205、Hep G2、MCF-7、Hela、NCI-H460均具有良好的体外抑制活性,对S.Aureus、B.Subtilis、E.Coli和S.Typhi具有选择性的抑菌作用。
目的：使用线性离子阱傅立叶转换串联质谱仪，对丹参中丹酚酸A和B进行多级裂解分析，探析其裂解规律。方法：采用进样针直接进样的方法，使用碰撞诱导解离（CID）裂解模式，对丹酚酸A和B进行多级裂解分析，Xcalibar V2.0进行数据分析，对碎片离子分子式推导，偏差设置为20。对两个化合物的裂解进行初步分析，全扫描及多级碎裂扫描的分辨率为30 000，多级碎裂模式为CID，碎裂能为35%。结果：丹酚酸类化合物在多级碎裂中，主要表现为丹参素基的丢失，且CO和H2O的丢失也较为明显。结论：本研究使用LTQ-Orbitrap高分辨质谱对两个化合物裂解途径进行分析，探讨其可能的裂解规律，为快速对中药材中该化合物的鉴别及其代谢物的鉴别提供实验数…
This research was supported by the Undergraduate Research Opportunities Program (UROP).
PART I. Synthesis and Characterization of Novel Metal-Citrate Complexes and the Investigation of Metal-Citrate Transporters in Gram-Positive Bacteria Abstract. Syntheses of new barium, cadmium, calcium, cobalt, iron, lead, magnesium, manganese, nickel, and strontium citrate complexes have been attempted using differen…
Studying of graphene like 2D materials is very intense and it is very likely to remain as one of the frontier research areas in materials sciences. Transferring of 2D materials onto target samples or substrates is essential for fundamental studies and potential applications. Conventional transfer technique usually inv…
利用1-（2-吡啶偶氮）-2-萘酚（PAN）与镓反应生成红色络合物的特性,建立了光度法测定钒钛磁铁矿中镓的方法。实验表明：于25mL比色管中,依次加入2.0mL KHP-HCl缓冲溶液（pH 3.2）、4.0mL 0.5g/L PAN溶液、3.0mL 95%乙醇,用水定容后反应10min,用1cm比色皿,于545nm处采用分光光度法进行测定,镓（Ⅲ）的质量浓度在0.05-3μg/mL范围内符合比尔定律,方法检出限为0.033μg/mL,表观摩尔吸收系数e=3.0×10^4 L·mol^-1·cm^-1。将GBW 07226a钒钛磁铁矿精矿一号和GBW 07224钒钛磁铁矿原矿一号样品经氢氧化钠和过氧化钠碱熔、水浸取、过滤、酸化还原…
The article presents the results of a comprehensive study of high-strength Сr-Ni-Mo-V steels. The authors show the effect of heating temperature of quenching and tempering temperature on structuring and mechanical-property forming of high-strength low-alloy sheet steel. Impact strength and hardness of test samples and…
Alkali-urea treatment, organic silicon, and steam explosion treatment were used for modification of sisal fiber, thermal stability was studied experimentally.
Optical elements working at 121.6nm make use of Al and MgF2. We analyzed mono- and bi-layers of these materials, deposited by e-beam evaporation, and discussed how substrate temperatures and annealing affect their performances.
利用Cu（NO3）2·3H2O、对苯二甲酸（H2BDC）、HF、去离子水通过水热合成方法,220℃晶化1d、2d、3d,合成出三维金属骨架材料MIL-53（Cu）1d、MIL-53（Cu）2d、MIL-53（Cu）3d,通过X射线衍射（XRD）、红外定性分析（IR）、扫描电镜（SEM）等表征手段对它们的结构、组成、形貌进行了研究。实验结果表明：合成时间对MIL-53（Cu）的分子结构影响不大,但对其产物的形貌有一定影响。
以柠檬酸铋、无水碳酸钠和氧化石墨烯（GO）为原料,采用一步水热法合成（Bi O）2CO3与GO复合的新型三维（3D）分级结构光催化剂（BOC-GO）.通过X射线衍射、扫描电子显微镜、透射电子显微镜、傅里叶红外光谱、拉曼光谱、X射线光电子能谱、表面积测定、紫外可见漫反射光谱和荧光光谱对样品进行表征分析.结果表明,（Bi O）2CO3微球分散在GO薄膜上,形成了新颖的3D分级结构.这种特殊的新结构作为光催化剂,在可见光照射下对ppb级NO（1ppb=1μg/m3）表现出了大幅增强的可见光催化活性和良好的光化学稳定性,远高于（Bi O）2CO3以及其他可见光催化剂.BOC-GO优异的活性可归因于3D分级结构与GO的耦合.一方面（Bi O…
A pele é um biomaterial complexo. Uma das suas características é anisotropia, devido ao alinhamento das fibras, decorrente da exposição prolongada a estados de tensão na pele. É importante para os estudos experimentais no campo da biomecânica cutânea e da dermatologia experimental. Nas últimas décadas, surgiram vários…
针对髙铝包晶钢连铸设计了Ca O-Si O2-Al2O3系保护渣.采用单丝法研究w（Ca O）/w（Al2O3）对保护渣结晶性能的影响;采用双丝法模拟了保护渣渣膜形成及凝固过程,研究了w（Ca O）/w（Al2O3）对保护渣固相体积分数φ的影响.结果表明：实验保护渣系结晶能力随w（Ca O）/w（Al2O3）增大而增强,按结晶能力分为两个区间,w（Ca O）/w（Al2O3）〉1.30时保护渣结晶能力强于w（Ca O）/w（Al2O3）≤1.30的保护渣;在等温结晶过程中,w（Ca O）/w（Al2O3）=1.00的实验保护渣中析出枪晶石,w（Ca O）/w（Al2O3）=2.50时渣中析出硅酸二钙;w（Ca O）/w（Al2O3…
Packaging practices are conducted on work unit substrates while they are temporarily held in place. This requires a simple adhesion process that enables easy removal without the burdens of complex cleaning. Substrates may be wafers, flexible displays, or components, organic or inorganic, and may contain topography suc…