نتایج جستجو برای: modified sol gel

تعداد نتایج: 356635  

Hamzeh Akhondi-Yamchi Noshin Safarzadeh Sohrab Ershad,

A novel chemically modified electrode containing Prussian blue complex was achieved on the surface of glass carbon electrode by sol-gel technique. The electrochemical behavior of modified electrode was characterized by cyclic voltammetry in detail. The film electrode obtained was very stable and exhibited electrocatalytic response for oxidation of nitrite. Results showed at bare GC electrode, a...

Journal: :iranian journal of pharmaceutical sciences 0
hossein najafi department of materials science and engineering , sharif university of technology, tehran, iran, ziarat ali nemati department of materials science and engineering , sharif university of technology, tehran, iran, zahra sadeghianb oil research center, tehran, iran nafiseh sohrabi department of materials science and engineering , sharif university of technology, tehran, iran

this article describes the preparation and analysis of nano hydroxyapatite (ha) films on stainless steel 316l through sol-gel technique. the process started with preparation of a nitrate and phosphate sol. after aging the sol for 24 h at room temperature a ss316 substrate was dip-coated and heat-treated at 350 to 450 °c for different times in air. the coating phase and structure on substrate we...

ژورنال: :روش های عددی در مهندسی (استقلال) 0
رضا مظفری نیا r. mozaffarinia فخرالدین اشرفی زاده و محمد علی گلعذار f. ashrafizadeh m. a. golozar

در این پژوهش دستیابی به تولید لایه های نازک سرامیکی با تکیه بر یک فناوری ساده موردنظر قرار گرفته و لایه نشانی sio2 به کمک فرایند نوین sol-gel بر روی زیرلایه هایی از جنس شیشه سودا ـ لایم انجام شده است. برای این منظور پس از آماده سازی نمونه ها و تهیه محلول sol ، عملیات لایه نشانی به روش غوطه وری در فواصل زمانی مختلف پس از ساخت محلول بر روی نمونه ها انجام شده و پس از خشک کردن، تحت عملیات پخت قرار ...

Journal: :journal of nanostructures 2015
m. behpour m. mehrzad s. m. hosseinpour-mashkani

in this research, the thin films of n-s doped titanium dioxide (tio2) were successfully prepared by simple sol-gel method in the presence of tetrabutylorthotitanate as a starting reagent. furthermore, titanium dioxide (tio2) was functionalized with thiourea. furthermore, n-s doped titanium dioxides (nsto) were fixed on glass balls by glass balls fixed-bed reactor system. besides, the effect of ...

2008
Youngjun Hong Gi-Ra Yi

Abstract. In present paper, various industrial applications of the sol-gel technology will be briefly introduced. In particular, the current development status and technological issues of sol gel derived functional nanoparticles in electronic and industrial materials will be reviewed. Productions and surface modifications of nanoparticles by sol-gel processing, their incorporations into nanocom...

Journal: :Chemical & pharmaceutical bulletin 1987
N Ohno Y Adachi M Ohsawa K Sato S Oikawa T Yadomae

Grifolan is an antitumor (13)-ƒÀ-D-glucan with a ƒÀ-glucosyl substitution at C-6 of every three main chain units, and is produced by Grifola frondosa. Grifolan possesses two different solid-state conformations, N (native) and H (helix) (N. Ohno et al., Chem. Pharm. Bull., 34, 2555 (1986)), and both form a gel in an aqueous neutral media. In this study, the gel-to-sol or sol-to-gel transition of...

Journal: :Superficies y vacío 2022

In this work, neodymium (Nd3+) doped strontium hexaferrite was obtained using the sol–gel based Pechini method. The cation distribution modified by doping with different amounts of Nd3+ ions when 0.0 ? x 0.4 according to chemical expression Sr1-xNdxFe12O19 powders were sintered at 1100 °C for 1 h. influence analyzed, and magnetic structural properties have been associated fabrication crystallin...

Journal: :Analytical chemistry 1998
M T Dulay R P Kulkarni R N Zare

Using sol-gel technology, a porous glass matrix (xerogel) is formed in a capillary column and acts as a support for a stationary phase of chromatographic particles used in capillary electrochromatography. Preparation of the sol-gel matrix and immobilization of the octadecylsilica (ODS) stationary phase occur in a single step. The presence of the particles in the column greatly reduces matrix cr...

Journal: :Electrophoresis 2013
Haixia Lü Qingyin Li Xiaowei Yu Jiaojiao Yi Zenghong Xie

A novel open-tubular CEC column coated with chitosan-graft-(β-CD) (CDCS) was prepared using sol-gel technique. In the sol-gel approach, owing to the 3D network of sol-gel and the strong chemical bond between the stationary phase and the surface of capillary columns, good chromatographic characteristics and unique selectivity in separating isomers were shown. The column efficiencies of 55,000∼16...

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