Ghaffar Torkashvand; Norodin Mirnia; Ali Bahari
Abstract
Template-assist method is one of the most important techniques for synthesize nanostructures , because of more parameters that can be change to fabricate different nanostructures with desired nano-scale features. self- ordered anodic alumina is one of the most important honeycomb structure that can be ...
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Template-assist method is one of the most important techniques for synthesize nanostructures , because of more parameters that can be change to fabricate different nanostructures with desired nano-scale features. self- ordered anodic alumina is one of the most important honeycomb structure that can be used as a template. by using self-ordered nanoporous as a template and hydrothemal process as a deposition technique,different structures like nanowire,nanotube and nanoparticle was fabricated. The effect of surfactant and temperature on the formation of various nano-structures were investigated by SEM (scanning electron microscopy) and EDX (Energy dispersive x- ray) analysis. Electrical properties and I(Current)- Voltage (V)- Gate - source behavior of the samples was measured by four-probe (4- probes) method. Tin oxide nanoparticle array on the surface of alumina membrane used as chemical sensor in case of detecting hydrazine. The obtained results indicate that Alumina doped with tin oxide nanoparticle is suitable for detection of toxic chemicals in water such as hydrazine.
Ali Bahari; Mohammad Ali Mousavi; Hosein Milani Moghadarm
Abstract
The use of nanotechnology ( and nanocomposites and nanohybrids) in replacing cement with nanomaterials due to environmental aspects and reduction of pollutants is presently an important issue and of course a significant problem in the whole world. In this regard, the effect of various weight percentages ...
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The use of nanotechnology ( and nanocomposites and nanohybrids) in replacing cement with nanomaterials due to environmental aspects and reduction of pollutants is presently an important issue and of course a significant problem in the whole world. In this regard, the effect of various weight percentages of functionalized carbon nanotubes together with montmorillonite nanoparticles and with titanium oxide nanoparticles were studied as replacements for the cement to improve the mechanical and microstructural properties of hardened cement paste composites. In the present study, carbon nanotubes, TiO2, and montmorillonite nanoparticles were synthesized as additions into cement matrix, and their nano-structural characterizations were studied using the TEM, XRD, X-Powder, DSC-TGA, FTIR, and GPS132A techniques. The obtained results indicate that addition of nanomaterials to cement-based composites improves mechanical, electrical and nano-structural properties and the quality as well as emission factors of samples with optimization portion of nano-particles found by Response surface methodology (RSM) method.
Ali Bahari; Hussein Salmani
Abstract
In the present work, Graphene Oxide (GO) nano particles with 0.1, 0.2, 0.4 and 0.8 weight percentages (wt.% ), synthesized by Hummer method entered into the Di-Calcium Silicate (C2S) matrix (synthesized with using Pechini method and their nano structural and mechanical characteristics studied by XRD ...
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In the present work, Graphene Oxide (GO) nano particles with 0.1, 0.2, 0.4 and 0.8 weight percentages (wt.% ), synthesized by Hummer method entered into the Di-Calcium Silicate (C2S) matrix (synthesized with using Pechini method and their nano structural and mechanical characteristics studied by XRD (X-ray diffraction), FTIR (Fourier transform infrared), GPS 132 A, 4- probe techniques and emission factor analyses. To study and examine GO-C2S nano composites as an environmentally- friendly Material for sustainable Development of Cement Structure 4- capacitor form, with Metal (Al) /GO-C2S composite/ Si substrate are fabricated. The quality factor and dissipation factor were measured by GPS 132 A tool. The obtained results show that sample with 0.4% wt. of GO nano particles has 0.625 fraction emission factor and higher quality factor (32.4), measured at two frequencies of 120 KHz and 1 KHz. Therefore C2S/ GO nano composite with 0.4 wt.% GONs can be therefore introduced as a good additive to reduced emission factor for production of cement and dissipation factor.