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Research Conducted at College of Science Has Updated Our Knowledge about Nanoparticles (Study of negatronic device based on amorphous carbon/nickel...

July 4, 2014

Research Conducted at College of Science Has Updated Our Knowledge about Nanoparticles (Study of negatronic device based on amorphous carbon/nickel nanocomposite)

By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Nanoparticles. According to news reporting originating from Riyadh, Saudi Arabia, by NewsRx correspondents, research stated, "Composed based on pyrogallol and formaldehyde (PF) reached by NiO nanoparticles has been prepared using sol-gel method to obtain negatronic PF/Ni devices. The obtained materials were subjected to heat treatment under inert atmosphere at 650 degrees C for 2 h. The X-ray diffraction analysis (XRD) shows that PF sample was composed of amorphous material while PF/Ni XRD spectra exhibited the presence of metallicnickel characteristic lines."

Our news editors obtained a quote from the research from the College of Science, "The transmission electron microscopy (TEM) images indicate that PF sample was formed by homogenous material, and metallic nickel nanoparticles sized around 30 nm were dispersed in the PF/Ni nanocomposite. dc I(V) characteristics indicate a symmetric and non-linear behavior and the presence of negative differential resistance (RDN) phase in the PF/Ni sample. The dc conductivity (sigma(dc)) can be explained by Variable Range Hopping (3D-VRH) conduction model in both samples. The ac conductance shows the dominance of hopping conduction mechanism in PF sample; however, the Correlated Barrier Hopping (CBH) model seems to be dominant in the PF/Ni nanocomposite."

According to the news editors, the research concluded: "The Nyquist plotswere used to identify an equivalent circuit with the aim to study the possible contribution of the grainsand boundary grains to the samples conductivities."

For more information on this research see: Study of negatronic device based on amorphous carbon/nickel nanocomposite. Applied Surface Science, 2014;308():10-16. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Applied Surface Science -

The news editors report that additional information may be obtained by contacting N. Ben Mansour, Al Imam Mohammad Ibn Saud Islamic Univ IMSIU, Coll Sci, Dept. of Phys, Riyadh 11623, Saudi Arabia (see also Nanoparticles).

Keywords for this news article include: Asia, Riyadh, Nickel, Saudi Arabia, Nanotechnology, Transition Elements, Emerging Technologies

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Source: Science Letter

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