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Micro-nano structured silica particles were synthesized successfully by grafted 4,4'-diphenylmethane diisocyanate (MDI). We report a robust procedure for preparing superhydrophobic materials with the advancing water contact angle (WCA) of about 155°. Micro-nano structured surface roughness, which mimics the surface topology of self-cleaning plant leaves, originates from well-defined micro-nano structured...
Silica (SiO2) filled epoxy with a particle size in μm-range has been established during the last decades. Now it has become possible to produce SiO2-filled epoxies, with filler particles in nm-range, which can be located in the polymer homogenously and without agglomerates. A new group of materials with a high percentage of inner boundaries has been designed. Therefore, the effect of this high interface...
Porous Silicon (PS) is one of the established materials and can be used in variety of applications in its different forms. Use of monolayer PS film for synthesis of Si QDs is reported here. Nanometer-sized silicon particles are produced by ultrasonic dispersion of thin films in DI water. PS films are characterized using cross sectional scanning electron microscopy and gravimetric analysis while the...
Using TiO2 from the hydrolysis of TiOSO4 as the precursor, and polystyrene (PS) as the template, TiO2/PS complex nanoparticles were successfully prepared through Layer-by-Layer self-assembly method. Then erased PS by heating, thus hollow sphere TiO2 was attained. The synthesized materials were characterized by SEM and XRD, the results indicated that TiO2 spheres were deposited on Ti substrate and...
Formation of Fe-Al composite thick layers using electron beam surface alloying process with nanometer iron powders have been investigated to improve the surface hardness and the wear resistance of 6061 aluminum alloy substrate. In this paper, the processes of electron beam surface modification on 6061 aluminum surface which added nanometer iron powder by electron beam surface alloying technique were...
An in vitro pH cycling model was used to evaluate the effect of nano-hydroxyapatite on the remineralization of artificial root caries. Sound human teeth fragments obtained from the cervical portion of the root were immersed in a demineralization solution for 96 h at 37??C to induce artificial root caries lesions. The demineralized samples were pH-cycled through treatment solutions, acidic buffer and...
Improvement of dye sensitized solar cell was investigated using methyl-violet dye and nanocrystalline ZnO thin film electrodes. A low cost fabrication method and low cost materials were used to prepare this photocell. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the microstructure and surface properties of dye coated ZnO electrodes. According to the...
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