Materials Literature
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In this study, Zn-30Al-1Cu (wt.%) alloy was prepared by the spray atomization and deposition technique. The microstructures of the spray-deposited and cast alloys were investigated by means of optical microscope, scanning electron microscope and X-ray diffraction. The wear resistance of the alloys was studied using a…
本文研究了丙烯酰氧乙基三甲基氯化铵（DAC）和丙烯酰胺（AM）的共聚物[P（AM．DAC）]对分散染料废水的絮凝脱色效果。以脱色率和Zeta电位为指标，考察了絮凝剂P（AM-DAC）的特征黏度、阳离子度对三种染料模拟废水的絮凝脱色效果的影响。结果表明：特征黏度为7．5dL／g左右，阳离子度分别为30％、50％和70％时，最高脱色率分别为79．97％、85．67％和80．69％，即随着阳离子度增加，Zeta电位增加越快速，但最高脱色率却是先增加后降低；阳离子度为50％，特征黏度分别为4．47、8．07和12．15dL／g时，最大脱色率分别为63．99％、86．01％和88．25％，即特征黏度越大．脱色效果越好，但Zeta电位增加越缓…
Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, February 2015.
Within a liquid, it is possible to lower the pressure to a point in which the nuclei gas bubbles will cause cavitation inception. During this drop in pressure, at constant temperature, the bubble tension will increase to the inception pressure. The difference between vapor pressure and the pressure where inception occ…
El trabajo de la presente memoria se centra en la obtención de materiales blandos, concretamente cristales líquidos columnares y geles, a partir de derivados de 4-aril pirazol y los derivados trinucleares cíclicos de oro(I) y plata(I). En esta memoria se recoge la preparación y caracterización tanto de las nuevas molé…
Polymer solar cells are a promising alternative to more traditional silicon solar cells. This is mainly due to the good solubility of organic semiconductors, which makes it possible to produce large-scale and mechanically flexible devices with roll-to-roll processes. To be able to fully utilise this promising techniqu…
Thin-film transistors (TFTs) with channel materials made out of hydrogenated amorphous silicon (a-Si:H) and polycrystalline silicon (poly-Si) have been extensively investigated. Amorphous silicon continues to dominate the large-format display technology; however newer technologies demand a higher performance TFT which…
The following dissertation addresses a novel low cost process developed to fabricate a Vertical Organic Field Effect Transistor (VOFET). The solution processable VOFET is designed, fabricated and tested in the context of bioengineering domains. The scope of distinct biomedical applications has also been explored.\nOrg…
In the present study mixed-conducting solid oxides with perovskite structure are investigated regarding their applicability as oxygen electrode (cathode) in solid oxide fuel cells based on proton-conducting electrolyte membranes. This type of high temperature fuel cells is a promising device as it may allow one to dec…
Liquid crystals (LCs), presently the basis of the dominant electronics display technology, also hold immense potential for the design of new self-assembling, self-healing, and "smart" responsive materials. Essential to many of these novel materials are liquid crystalline defects, places where the liquid crystalline or…
This thesis attempts to shed light on various spin-orbit driven transport phenomena in materials, as a crucial for the further development of the field of spintronics. In particular, we address the skew-scattering mechanism in dilute alloys, which gives rise to the anomalous and spin Hall effect, as well as spin-relax…
Der Einsatz von GJV in der automobilen Serienfertigung ist momentan aufgrund seiner schlechten Zerspanbarkeit hauptsachlich auf Fahrzeuge der Oberklasse und den Nutzfahrzeugsektor beschrankt. Zerspanende Operationen an Zylinderkurbelgehausen aus GJV, insbesondere kontinuierliche Prozesse wie das Zylinderbohren, sind d…
This thesis studied cadmium sulfide and cadmium selenide quantum dots and their performance as light absorbers in quantum dot-sensitised solar cells. This research has made contributions to the understanding of size dependent photodegradation, passivation and particle growth mechanism of cadmium sulfide quantum dots u…
Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.
The progress of our information society in this current era depends mostly on the improvement of the computing speed of microprocessors. Therefore semiconductor industries realize further developments in processor architecture but also in the patterning process which is utilized for the manufacturing of microprocessor…
Sedimenting suspensions exist in a varity of natural phenomena and industrial applications. It is already observed in experiments that the dilute fibre suspensions experience a concentration instability under gravity at low Reynolds numbers. Initially well-mixed suspensions become inhomogeneous and anisotropic due to…
The ageing mechanisms and long-term stability of different solar thermal absorber coatings were investigated at elevated temperatures of 200-500 °C. The absorbers were aged by means of thermal accelerated ageing studies and short-period heat treatments up to 500 °C for two hours.\n\nThe solar absorbers studied were va…
The irradiation of tetrahedral amorphous carbon (ta-C) with swift heavy ions leads to the formation of conductive microscopic ion tracks with diameters of about 10 nm. This phenomena depends on the sp² to sp³ hybridization-ratio of the amorphous carbon structure. The energy deposition of the impinging ion induces a ma…
In this work, the use of modified diamond as an electrode material with superlative physical and electrochemical properties was investigated in a number of electrochemical applications. The surface chemistry of three differing forms of diamond, namely boron-doped microcrystalline diamond, boron-doped diamond powder an…
During the past decade significant attention has been focused on study of organic solar cells, representing a promising technology for renewable environmental-friendly energy. In comparison to the inorganic counterparts, the organic photovoltaic devices posses a number of important advantages, however, their applicati…