Preparation of Elemental Cu and Ni Nanoparticles by the Polyol Method: An Experimental and Theoretical Approach

2011 ◽  
Vol 115 (6) ◽  
pp. 2656-2664 ◽  
Author(s):  
Kyler J. Carroll ◽  
J. Ulises Reveles ◽  
Michael D. Shultz ◽  
Shiv N. Khanna ◽  
Everett E. Carpenter
Keyword(s):  
Theoretical Approach ◽  
Polyol Method ◽  
Ni Nanoparticles

Pd-coated Ni nanoparticles by the polyol method: an efficient hydrogenation catalyst

2002 ◽  
Vol 12 (10) ◽  
pp. 3147-3151 ◽  
Author(s):  
K. Nagaveni ◽  
Arup Gayen ◽  
G. N. Subbanna ◽  
M. S. Hegde
Keyword(s):  
Polyol Method ◽  
Hydrogenation Catalyst ◽  
Ni Nanoparticles

One-step synthesis of carbon nanotubes with Ni nanoparticles as a catalyst by the microwave-assisted polyol method

2011 ◽  
Vol 509 (6) ◽  
pp. 2829-2832 ◽  
Author(s):  
Xian-song Liu ◽  
Feng Hu ◽  
De-ru Zhu ◽  
Dao-ning Jia ◽  
Peng-peng Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polyol Method ◽  
Ni Nanoparticles ◽  
Microwave Assisted ◽  
One Step ◽  
Synthesis Of Carbon Nanotubes

The Role of Hydroxide Ions in the Synthesis of Ni Nanoparticles Using High Temperature Polyol Method

2013 ◽  
Vol 391 ◽  
pp. 18-22
Author(s):  
Nik Roseley Nik Roselina ◽  
Azizan Aziz ◽  
Koay Mei Hyie ◽  
C.M. Mardziah ◽  
A. Kalam ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Reaction Rate ◽  
Polyol Method ◽  
Ni Nanoparticles ◽  
Facile Synthesis ◽  
X Ray ◽  
Transmission Electron ◽  
Rapid Reaction ◽  
Size And Morphology

This study investigate the role of hydroxide ions (OH-) in the synthesis of Ni nanoparticles through polyol method at the temperature of 180°C. Ni nanoparticles were prepared using ethylene glycol (EG) as the solvent and hydrazine (N2H4) as the reducing agent. Sodium hydroxide (NaOH) was used to introduce the OH-in solutions. Amount of OH-has been controlled through manipulation of OH-/Ni2+ratios. The role of OH-has been discussed in terms of size, morphology and reaction rate. Particles size and morphology were determined by Transmission Electron Microscopy (TEM). X-Ray Diffractometer (XRD) was used to verify the chemical composition of as-synthesized particles. The results demonstrated that at temperature of 180°C, Ni nanoparticles can be synthesized even without the existance of OH-. Although there no significant particles size changes,synthesis without OH-showed the most rapid reaction as compared to samples with OH-. Probable mechanisms for formation of Ni nanoparticles with and without OH-are also discussed. This finding contribute to a new rapid and facile synthesis of Ni nanoparticles.

Differential polarization imaging of sickled cells

1988 ◽  
Vol 46 ◽  
pp. 62-63
Author(s):  
Marcos F. Maestre
Keyword(s):  
Optical Properties ◽  
Theoretical Approach ◽  
Polarized Light ◽  
Polarization Microscopy ◽  
Spectroscopic Techniques ◽  
Polarization Imaging ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Microscopic Scale ◽  
Chiral Structures

Recently we have developed a form of polarization microscopy that forms images using optical properties that have previously been limited to macroscopic samples. This has given us a new window into the distribution of structure on a microscopic scale. We have coined the name differential polarization microscopy to identify the images obtained that are due to certain polarization dependent effects. Differential polarization microscopy has its origins in various spectroscopic techniques that have been used to study longer range structures in solution as well as solids. The differential scattering of circularly polarized light has been shown to be dependent on the long range chiral order, both theoretically and experimentally. The same theoretical approach was used to show that images due to differential scattering of circularly polarized light will give images dependent on chiral structures. With large helices (greater than the wavelength of light) the pitch and radius of the helix could be measured directly from these images.

Historic memory and propaganda. A theoretical approach to the communicative study of memory

2016 ◽  
Vol 0 (26) ◽  
pp. 71-94 ◽  
Author(s):  
Miguel Vázquez Liñán ◽  
◽  
Salvador Leetoy ◽  
Keyword(s):  
Theoretical Approach ◽  
Historic Memory

Toxic Leadership in the Military Organization – A Theoretical Approach to Failed Leadership

2020 ◽  
Vol 26 (1) ◽  
pp. 182-185
Author(s):  
Alexandru Baboș ◽  
Raluca Rusu
Keyword(s):  
Cultural Differences ◽  
Theoretical Approach ◽  
Personal Characteristics ◽  
Toxic Leadership ◽  
Military Organization ◽  
The Military

AbstractThe toxic leadership refers to destructive behaviours and leaders’ personal characteristics which cause serious damage to the subordinates and organizations. Still, what is toxic for the military in one country can be good in another one, given the cultural differences. This article wants to emphasize, from a theoretical approach, the main characteristics and effects of toxic leadership within the military organization.

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