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Soft chemical synthesis of nanosized zinc aluminate spinel from the thermolysis of different organic precursors


A new method of preparation of nanocrystalline zinc aluminate (ZnAl2O4) powder is described in this paper. Different organic acids are used as template material and nitric acid as an oxidant. Single phase ZnAl2O4 spinel can be formed at a much lower temperature through this route which gives nanocrystalline powder with uniform particle size and morphology. The powders are characterized by thermo gravimetric analysis (TGA), X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FT-IR), BET surface area analysis and field emission scanning electron microscopy (FE-SEM). The average crystallite size of the single phase material was of 20 to 30 nm and the surface area was found to be 21 to 27 m2g−1.

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Dielectric, etching and Z-scan studies of glycine doped potassium thiourea chloride crystal

obtained and precisely measured quantity of glycine (3 mol.%) was gradually introduced to the solution. The glycine added PTC solution was constantly allowed to mix for eight hours for homogeneous doping of glycine in PTC. The glycine doped potassium thiourea chloride solution was filtered in a rinsed beaker and slow solution evaporation was achieved in an isothermal environment. A single crystal of glycine doped potassium thiourea chloride material is shown in Fig. 1 . Fig. 1 Glycine doped PTC single crystal. 3 Results and discussion 3

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Experimental and Numerical Study on PDMS Collapse for Fabrication of Micro/Nanochannels

-3819. [24] XU, B. Y.—XU, J. J.—XIA, X. H.—CHEN, H. Y. : Large scale lithography-free nanochannel array on polystyrene, Lab on a Chip, 10 No. 21 (2010), 2894-2901. [25] LO, K. F.—JUANG, Y. J. : Fabrication of long poly(dimethyl siloxane) nanochannels by replicating protein deposit from confined solution evaporation, Biomicrofluidics, 6 No. 2 (2012), 026504. [26] KIM, S. H.—CUI, Y.—LEE, M. J.—NAM, S.-W.—OH, D.—KANG, S. H.—KIM, Y. S.—PARK, S. : Simple fabrication of hydrophilic nanochannels using the chemical bonding between activated ultrathin PDMS layer and

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