Materials Literature
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In solid state physics, it is important to investigate into the interaction between various degree of freedoms, like spin, charge, lattice and orbital. Because any ordered degree of freedom has to influence the others, then their interaction will change the ground state of the system. In this thesis, I will focus on t…
The solar cells converse the incident sun light to electricity using photoelectrochemical process. Numerous materials in DSCs showed the important roles in core charge transfer phenomena such as light harvesting, electron injection, electron transport, and dye regeneration. For the flexible photovoltaic device as the…
Resistive random Access memory (RRAM) is one of the most attractive memory device because of its high scalability, high speed, high reliability (endurance, retention etc.), simple device structure and multi-level cell capability. In this study, Ultra high density RRAM are extensively studied. Moreover, to mitigate sne…
The development of the fruitfly Drosophila melanogaster is regulated by the steroid hormone ecdysone. Ecdysone is released at the onset of metamorphosis and initiates a cascade of transcriptional events. First, it leads to the heterodimerisation of the Ecdysone receptor (EcR) with its binding partner ultraspiracle. Th…
With fast development of semiconductor non-volatile memory devices, conventional charge-based memories are approaching to their scaling limit. Among the emerging memory devices, resistive random access memory (RRAM) is one of the most promising candidates for future applications. In this study, we focused on HfOX and…
Hydrogen peroxide was widely used oxidizer due to its strong oxidative power. However, its decomposition rate was too fast to handle for the industrial applications like pulp bleaching, advance oxidation process, or pickling process. Therefore, a stabilizer to decelerate the reaction of hydrogen peroxide decomposition…
Metal-organic frameworks (MOFs), consisting of metal ions or clusters and organic linkers, have attracted broad interests in recent decades because of their intriguing pore structures as well as their potential applications in catalysis, gas storage and separation, magnetism and drug delivery, etc. Controlling pore st…
This paper presents a portable low-cost biosensor platform for ISFET and enzyme-based sensors. To meet various demands of diagnosis, our portable platform is designed to perform cyclic voltammetry, amperometry, and linear sweep voltammetry for enzyme-based sensor and ISFET sensor. For compatibility with various sensor…
The blood-brain barrier (BBB) and the blood-spinal cord barrier (BSCB) separate the brain and the spinal cord from the circulating blood and are important for the maintenance of the CNS homeostasis. They build a physical barrier thereby protecting the CNS from pathogens and toxic agents, and their disruption plays a c…
Zeolites have extensively been used in fields of commercial importance as ion exchangers, adsorption materials, and catalysts. Meanwhile, there remain lots of novel materials with new structures or compositions, because there are only 218 molecular sieve structures registered with the Structure Commission of the Inter…
Carbon nanotube (CNT) fiber has gained attention as a new material to replace commercial carbon fibers. However, the research level is primitive, so a thorough basic studies are necessary to surpass the properties of carbon fibers. As a model system for such academic studies, CNT forest is appropriate. In this study,…
Elastic metamaterials have been extensively investigated due to their unique abilities on controlling propagation of subwavelength elastic waves. One of the most interesting properties is the generation of band gaps, in which elastic waves cannot propagate through. The growing technological development in electro/magn…
In horizontal rolling, the need for evaluating the effect of flow stress characteristic and process condition on width spread is necessary to control precision of width spread after rolling. With the right evaluation, we can know the significant factors that cause error between simulation results and experiment data.…
Single crystals of sulphanilic acid have been grown from aqueous solution by doping with L-proline and L-lysine monohydrochloride dihydrate by solvent evaporation technique, with the vision to improve the physiochemical properties of the sample. The characterization of the grown crystals were made by X-ray diffraction…
Vinyl wallpapers are most popular in the nowadays wallpaper market. It is made out of non-woven or paper coated with plasticized polyvinyl chloride (PVC). PVC has very good mechanical and physical properties, these properties stays even if products are exploited outside. But plasticized polyvinyl chloride contains tox…
New routes for the synthesis of ECR-40 material, their characterization, and catalytic properties are described. A family of ECR-40 materials, denoted ECR-40F, ECR-40G, and ECR-40H, has been synthesized by using diquaternary ammonium ions as a new organic structure-directing agent and their as-made and calcined forms…
Hot ductility loss and recovery mechanisms of C-Mn and C-Mn-Nb steels were investigated with various thermal histories before hot deformation. The austenite grain boundaries are embrittled by the segregated sulfur. During holding at a temperature, a convex segregation profile of sulfur, which is due to the precipitati…
Neste trabalho, caracterizacoes dieletricas em funcao da frequencia e da temperatura foram conduzidas em amostras cerâmicas de TbMnO3 processadas em duas atmosferas distintas oxigenio e argonio. A constante dieletrica de ambas as amostras apresentou tres anomalias no intervalo de temperatura entre 12 e 300 K. Duas des…
The effect of loading direction on flow stress of hot-rolled pure titanium with a transverse split basal texture was investigated at room temperature using uniaxial compression and tensile test. Large variation in flow stress was found for samples of different orientations and loading direction. The major sources of t…
A crystal nucleus in a finite volume may exhibit phase coexistence with a surrounding fluid. The thermodynamic properties of the coexisting fluid (pressure and chemical potential) are enhanced relative to their coexistence values. This enhancement is uniquely related to the surface excess free energy. rnA model for we…