Abstract Nanoparticles of formula Co 1- x Zn Fe 2 O 4 ( = 0.0, 0.3, and 0.5) were prepared successfully using a citrate-auto-combustion method. This work studies the substitution effect 2+ ion on physical, chemical, structural properties CoFe . The structure samples was determined via X-ray diffraction (XRD) Fourier transformed infrared spectrometer (FTIR). investigated ensures that all crystal...

Metal-organic framework 5 (MOF-5) and bimetallic MOF-5s (Co/Zn and Ni/Zn) were prepared via a simple solvothermal method. Samples were characterized by various techniques such as powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), UV-Vis diffuse reflectance spectroscopy (DRS), inductively coupled plasma (ICP) and elemental analysis (EA). Photo...

The rational design and facile construction of hybrid metal–organic framework (MOF) with hierarchical nanostructures can motivate novel multifunctional platforms to attain desirable performance. In this work, a new series MOF-on-MOF heterostructures, including ZIF-8/Zinc(II)-hexamethylenetetramine (ZIF-8/Zn-HMT) ZIF-8 + ZIF-67/Zn-HMT-X (ZIF/Zn-HMT-X), be conveniently synthesized by heteroepitax...

The electrical isolation of Zn-doped GaAs layers grown by metalorganic chemical vapor deposition was studied using H, Li, C, and O ion implantation. The ion mass did not play a significant role in the stability of isolation, and a similar activation energy of ;(0.6360.03 eV) was obtained for isolation using either H or O ions. Furthermore, the isolation was stable against isochronal annealing u...

Pure and Samarium (Sm3+) doped Mn-Zn ferrites were synthesized using Co-precipitation method. The Sm3+ concentration varied from 0.1% to 0.3%. This was added the solution during synthesis of (Mn0.5Zn0.5Fe2O4) at room temperature. precipitate so obtained annealed 200℃ for 4 h then crushed powder. powdered material subjected structural, morphological, compositional, optical magnetic characterizat...

In the ZnO based varistor, the improvement of nonlinear coefficient (α) and prevention of evaporation of Bi2O3 during heat treatments can be achieved by the addition of MnO2 or Co3O4. In this conjunction, it is proper to see the effect of these additives at different low mol percentage and sintering conditions to nonlinear coefficient improvement of the varistor ceramics. In this paper, the inv...

Peng Cheng,1 Bing Shen,1 Jiangping Hu,1,2 and Hai-Hu Wen1,* 1National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China 2Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA Received 11 January 2010; revised manuscript received 3 May 2010; p...