علی بهاری
استاد، فیزیک حالت جامد، دانشگاه مازندران، مازندران، ایران
[ 1 ] - سنتز و مشخصه‌یابی کامپوزیت سیمان- نانولوله کربنی تولید شده به روش نهشت بخار شیمیایی
تقویت مواد با استفاده از نانولوله‌های کربنی، رویکرد جدید در ساخت کامپوزیت‌های نو و پیشرفته است. در این بین، استفاده از نانولوله‌های کربنی برای تقویت مواد سیمانی از جمله سیمان‌های ترمیمی مورد توجه قرار گرفته است. چالش مهم در ساخت کامپوزیت سیمان- نانولوله کربنی فرایند سنتز نانولوله روی سیمان است. در این مقاله، سنتز و مشخصه‌یابی کامپوزیت سیمان- نانولوله کربنی تولید شده به روش نهشت بخار شیمیایی مور...
[ 2 ] - Organic Thin Film Transistors with Polyvinylpyrrolidone / Nickel Oxide Sol-Gel Derived Nanocomposite Insulator
Polyvinylpyrrolidone / Nickel oxide (PVP/NiO) dielectrics were fabricated with sol-gel method using 0.2 g of PVP at different working temperatures of 80, 150 and 200 ºC. Structural properties and surface morphology of the hybrid films were investigated by X- Ray diffraction (XRD) and Scanning Electron Microscope (SEM) respectively. Energy dispersive X-ray spec...
[ 3 ] - Synthesize And Investigate The Austenitic Nanostructural Propertise
The austenitic stainless steel (SS) has been used as a material for building ultra high vacuum (UHV) chamber. Recently significant efforts have been concerned a comparing the standard cleaned for ultra high vacuum, passivity stainless. In this work Austenitic nanocomposites were synthesize by sol- gel method. The morphologies and topographies of the samples h...
[ 4 ] - Deconvoluted Si 2p Photoelectron Spectra of Ultra thin SiO2 film with FitXPS method
The main impetus for our research is provided by the growing interest worldwide in ultra thin silicon dioxide on silicon based nano devices. The obvious need for better knowledge in the ultra thin gate silicon dioxides, is motivated both by interests in fundamental research and phenomenology as well as by interests in possible applications, which can be found with better fitting of experimental...
[ 5 ] - مقایسه ویژگی نانو ساختاری اکسید آلومینیوم و اکسید تیتانیوم
Recently, high – K materials such as Al2O3 and TiO2 films have been studied to replace ultra thin gate silicon dioxide film. In the present work, these films were grown on the top of Si(100) surface at different temperatures and under ultra high vacuum conditions. The obtained results showed that Al2O3 has a structure better than that of TiO2 and thus can be used as a good gate dielectric ...
[ 6 ] - Degenerate four waves mixing in multilayer nanoshell
We will present a detailed investigation of intersubband transitions process in core-multi shells quantum dots. The confined wave functions and eigenenergies of electrons in quantum dots have been calculated under the effective-mass approximation by solving a three-dimensional Schrodinger equation. Excellent dependence is found between size effects, time relaxation and degenerate four wave mixi...
[ 7 ] - Structure of Lattice Strain and effect of sol concentration on the characterization of TiO2-CuO-SiO2 nanoparticles
We report on the synthesis, morphology, chemically and structurally of TiO2-CuO-SiO2 nanostructure with different precursors molar ratio and calcined temperatures. In the present work, ternary reactive powders in the TiO2-CuO-SiO2 systems have been obtained using the sol-gel method, by the simultaneous gelation of all cations. The compounds and other ...
[ 8 ] - برآورد تنش شبکه در نانوکامپوزیت اکسید فلزی- ماده آلی با استفاده از معادله ویلیامسون هال
In the present work, metallic oxide–organic material hybrid nanocomposites (Poly vinyl pyrrolidone- zinc oxide, PVP-ZnO) have been synthesized using sol-gel method. Nanostructural properties of aforementioned materials were studied by scanning electron microscope (SEM) and X-ray diffraction techniques. Williamson equation was used to estimate lattice strain in the PVP-ZnO nanocomposite. The dom...
[ 9 ] - بررسی فازهای بلوری، ویژگی‌های نانو ساختاری و مکانیکی فولاد‌‌‌‌های زنگ نزن مقاوم به حرارت
In the present work, the effects of different casting parameters including pouring temperature and cooling rate on stainless steel structures and mechanical properties of heat resistant alloy (HH) were studied. Mo nanoparticles were synthesized through sol-gel method and were coated on the stainless steel device using spin-coating method. The effect of coating layer on the device was studied by...
[ 10 ] - بررسی ورقه‌های سیلیکونی (111) و مقایسه آن با زیر لایه‌های سیلیکونی (100)
In the last decade, Si(100) has been used as a suitable substrate in field effect transistors. Some issues such as leakage current and tunneling current through the ultrathin films have been increased with shrinking the electronic devices – particularly, field effect transistors – to nanoscale, which is threatening more use of Si(100). We have thus demonstrated a series of experiments to grow ...
[ 11 ] - Degenerate four waves mixing in multilayer nanoshell
We will present a detailed investigation of intersubband transitions process in core-multi shells quantum dots. The confined wave functions and eigenenergies of electrons in quantum dots have been calculated under the effective-mass approximation by solving a three-dimensional Schrodinger equation. Excellent dependence is found between size effects, time relaxation and degenerate four wave mixi...
[ 12 ] - Structure of Lattice Strain and effect of sol concentration on the characterization of TiO2-CuO-SiO2 nanoparticles
We report on the synthesis, morphology, chemically and structurally of TiO2-CuO-SiO2 nanostructure with different precursors molar ratio and calcined temperatures. In the present work, ternary reactive powders in the TiO2-CuO-SiO2 systems have been obtained using the sol-gel method, by the simultaneous gelation of all cations. The compounds and other ...
[ 13 ] - Optical and Nano structural properties of Hematite (α-Fe2O3) nanorods in interaction with Bovine Serum Albumin (BSA) Protein Solution
Hematite (α-Fe2O3) nanorods were synthesized by hydrothermal method using Cetyltrimethylammonium bromide (CTAB) as a surfactant agent. To study optical, nanostructural properties, and to control the morphology and shape of nanorods, 0.025 mol L-1, 0.05 mol L-1 and 0.1 mol L-1 concentration of CTAB were used. Moreover, the effect of interaction between bovine serum albumin (BSA) A9418-5G protein...
نویسندگان همکار