نتایج جستجو برای: nanoparticles surfactant free ultrasonic

تعداد نتایج: 660541  

2015
Antonio Lopalco Hazem Ali Nunzio Denora Erik Rytting

Encapsulation of antiepileptic drugs (AEDs) into nanoparticles may offer promise for treating pregnant women with epilepsy by improving brain delivery and limiting the transplacental permeability of AEDs to avoid fetal exposure and its consequent undesirable adverse effects. Oxcarbazepine-loaded nanoparticles were prepared by a modified solvent displacement method from biocompatible polymers (p...

The perovskite-structured La2CuO4 nanoparticles have been synthesized via an ultrasonic-assisted co-precipitation route using octanoic acid as organic surfactant, and the phase composition, morphology, lattice parameters and size of nanoparticles are characterized through Fourier transform infrared spectrosco...

Journal: :Colloid and Polymer Science 2009
Anke Ziegler Katharina Landfester Anna Musyanovych

Phosphonate-functionalized polymer nanoparticles were synthesized by free-radical copolymerization of vinylphosphonic acid (VPA) with styrene or methyl methacrylate (MMA) using the miniemulsion technique. The influence of different parameters such as monomer and surfactant type, amount of vinylphosphonic acid on the average particle size, and size distribution was studied using dynamic light sc...

Journal: :Faraday discussions 2015
Roman Latsuzbaia Emanuela Negro Ger Koper

The design of a synthesis strategy for metal nanoparticles by templating dense microemulsions is proposed. Particle size is controlled by surfactant size rather than by microemulsion composition. The strategy was demonstrated with various systems with different surfactant: cationic, anionic and non-ionic and of different sizes. Formulations were determined using the microemulsion phase diagrams...

Journal: :Nanoscale 2015
Young Yong Kim Bora Hwang Sungjin Song Brian J Ree Yongjin Kim Seo Yeon Cho Kyuyoung Heo Yong Ku Kwon Moonhor Ree

A new approach for synthesizing well-defined hollow nanochanneled-silica nanosphere particles is demonstrated, and the structural details of these particles are described for the first time. Positively charged styrene copolymer nanospheres with a clean, smooth surface and a very narrow size distribution are synthesized by surfactant-free emulsion copolymerization and used as a thermal sacrifici...

Journal: :international journal of nano dimension 0
h. nabipour department of chemistry, islamic azad university, takestan branch , takestan, iran.

nano dithiocarbamate (dtc) complex have been prepared by reaction between dithiocarbamate and metal salt under ultrasound irradiation. reaction conditions such as the ligand dtc and phennantroline concentration, aging time and the ultrasonic device power show important roles in the size, morphology and growth process of the final products. the dithiocarbamate complex nanoparticles have been pre...

Journal: :international journal of bio-inorganic hybrid nanomaterials 0

in this work, we report synthesis and characterization of copper nanoparticles in polymer matrix by wet-chemical reduction method using ascorbic acid as reducing agent, copper (ii) sulfate as metal precursor and polyvinylpyrrolidone k-30 (pvp k-30) as surfactant agent. the reaction was carried out in a high-speed stirring mixture at room temperature under nitrogen atmosphere. characterization o...

Journal: :Sustainable chemistry 2021

The Co4CatTM process is a simple, surfactant-free method to produce colloidal dispersions of precious metal nanoparticles in alkaline mono-alcohols. synthesis performed low-boiling-point solvents and relevant for industrial production. robustness the demonstrated by using three different commercial spirits as obtain Pt nanoparticles. results demonstrate that careful control solvent purity not n...

Journal: :The journal of physical chemistry. A 2009
Ahmad Alshawa Otto Dopfer Christopher W Harmon Sergey A Nizkorodov Joelle S Underwood

Aerosolized nanoparticles of NaCl coated with variable amounts of surfactant AOT were generated by electrospraying AOT/NaCl aqueous solutions, followed by neutralizing and drying the resulting particles. A tandem differential mobility analyzer was used to select a narrow size distribution of particles with mobility equivalent diameters below 20 nm and monitor their hygroscopic growth as a funct...

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