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Effect of Surfactant Types on the Size of Tin Oxide Nanoparticles

100%
Boran F., Çetinkaya S., Şahin M.
Acta Physica Polonica A
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2017
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vol. 132
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issue 3
546-548
EN
In this study, tin oxide (SnO₂) nanoparticles were synthesized by hydrothermal method in the presence of hydrazine and ammonia by adding surfactant for 12 h in a Teflon autoclave at 100°C reaction temperature. Tin(II) chloride hydrate as an inorganic precursor, hexadecyl trimethyl ammonium bromide (CTAB), and tetrapropyl ammonium bromide (TPAB) as cationic, and sodium dodecyl sulfonate (SDS) as anionic surfactants were used. The results showed that the size and shape of nanoparticles depended on the surfactant types. The nanoparticles sizes between 17.5 and 19.7 nm were obtained by changing types of surfactants. Synthesized tin oxide nanoparticles were characterized by field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and the Fourier transform infrared spectroscopy.
2
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SYNTHESIS OF SILVER NANOPARTICLES IN A CHITOSAN SOLUTION

100%
Modrzejewska Z., Zarzycki R., Sielski J.
Progress on Chemistry and Application of Chitin and its Derivatives
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2010
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vol. 15
63 - 72
EN
In the present study silver nanoparticles were obtained using the ability of chitosan to form chelate compounds with metal ions and taking advantage of its reducing properties. The reduction process was conducted at the temperature 60°C or applying γ radiation from 60Co cobalt source. A preliminary characteristic which allows us to realize the size of formed silver nanoparticles was made on the basis of the measurements of UV absorption and dynamic light dispersion.
3
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Interaction of SiO2Nanoparticles with Seed Prechilling on Germination and Early Seedling Growth of Tall Wheatgrass (Agropyron Elongatum L.)

100%
Azimi R., Borzelabad M. J., Feizi H., Azimi A.
Polish Journal of Chemical Technology
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2014
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vol. 16
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issue 3
25-29
EN
The effect of six SiO2 nanosized concentrations (0, 5, 20, 40, 60 and 80 mg L-1) and three seed prechilling treatments (control, seed prechilling before nano SiO2 treatments, treatments of seed with nano SiO2 before prechilling) on germination and seedling growth of tall wheatgrass (Agropyron elongatum L.) were studied. Results indicated that application of SiO2 nanoparticles significantly increased seed germination of tall wheatgrass from 58 percent in control group to 86.3 and 85.7 percent in 40 and 60 mg L-1, respectively. Applying SiO2 nanoparticles increased dry weight of shoot, root and seedling of tall wheatgrass. Increasing concentration of nanoparticle from 0 up to 40 mg L-1 increased seedling weight around 49 percent compared to the control, nevertheless decreased under 60 and 80 mg L-1 treatments. In conclusion, seed prechilling in combination with SiO2 nanoparticles largely broke the seed dormancy for A. elongatum.
4
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Brownian dynamics for calculation of the single fiber deposition efficiency of submicron particles

88%
Sztuk E., Przekop R., Gradoń L.
Chemical and Process Engineering
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2012
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vol. 33
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issue 2
279-290
EN
The motion of submicron particles involves the deterministic terms resulting from the aerodynamic convection and/or electrostatic attraction, and the stochastic term from the thermal displacement of particles. The Langevin equation describes such behavior. The Brownian dynamics algorithm was used for integration of the Langevin equation for the calculation of the single fiber deposition efficiency. Additionally the deterministic and stochastic of the particle motion were derived, using the Lagrangian and Eulerian approaches of particle movement and balance, for the calculation of the single fiber deposition efficiency due to both mechanisms separately. Combination of the obtained results allows us for calculation of the coupling effect of inertia and interception with the Brownian diffusion in a form of correlation. The results of calculation show that the omitting of the coupling effect of particular mechanism and using the simple additive rule for determination of the single fiber deposition efficiency introduces significant error, especially for particles with diameter below 300 nm.
5
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Brownian dynamics for calculation of the single fiber deposition efficiency of submicron particles

75%
Sztuk E., Przekop R., Gradoń L.
Chemical and Process Engineering
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2012
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issue 2
6
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Phase Structure and Magnetic Properties of Intermetallic Cu-Ni Alloy Nanopowders Synthesized by the Electrical Explosion of Wire

75%
Thuyet-Nguyen M., Kim J.-C.
Archives of Metallurgy and Materials
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2019
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vol. 64
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issue 3
7
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Role of Acetone in the Formation of Highly Dispersed Cationic Polystyrene Nanoparticles

75%
Ernawati L., Balgis R., Ogi T., Okuyama K., Takada T.
Chemical and Process Engineering
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2017
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vol. 38
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issue 1
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