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Yarovoi, Spartak S.,Mironov, Yuri V.,Naumov, Dmitry Y.,Gatilov, Yuri V.,Kozlova, Svetlana G.,Kim, Sung-Jin,Fedorov, Vladimir E. WILEY-VCH Verlag 2005 European journal of inorganic chemistry Vol.2005 No.19
<P>Two novel rhenium cluster compounds, K<SUB>4</SUB>[Re<SUB>6</SUB>S<SUB>8</SUB>(OH)<SUB>6</SUB>]·8H<SUB>2</SUB>O (1) and K<SUB>4</SUB>[Re<SUB>6</SUB>Se<SUB>8</SUB>(OH)<SUB>6</SUB>]·8H<SUB>2</SUB>O (2), containing octahedral cluster chalcogenide anionic complexes [Re<SUB>6</SUB>Q<SUB>8</SUB>(OH)<SUB>6</SUB>]<SUP>4–</SUP> with terminal hydroxo ligands have been synthesized by the reaction of Re<SUB>6</SUB>Q<SUB>8</SUB>Br<SUB>2</SUB> (Q = S, Se) with molten KOH. Two chalcohalide compounds, one known (Cs<SUB>4</SUB>[Re<SUB>6</SUB>S<SUB>8</SUB>Br<SUB>6</SUB>]·2H<SUB>2</SUB>O, 3) and another new (Cs<SUB>3</SUB>[Re<SUB>6</SUB>Se<SUB>8</SUB>Cl<SUB>6</SUB>]·2H<SUB>2</SUB>O, 4), were prepared by reactions of 1 and 2 with CsX and HX (X = Br, Cl) in an aqueous solution. Compounds 1, 2, and 4 have been characterized by the single-crystal X-ray diffraction method. Compounds 1 and 2 are crystallized in triclinic space group P<TEX>$\bar {1}$</TEX> with one formula unit in the cell of dimensions a = 8.4936(8) Å, b = 8.9101(11) Å, c = 10.5940(13) Å, α = 77.935(11)°, β = 75.933(9)°, γ = 71.244(10)°, V = 728.9(1) Å<SUP>3</SUP> (compound 1) and a = 8.613(1) Å, b = 8.996(1) Å, c = 10.057(1) Å, α = 78.587(2)°, β = 77.811(2)°, γ = 71.728(2)°, V = 715.9(2) Å<SUP>3</SUP> (compound 2). Compound 4 crystallizes in the monoclinic space group P2<SUB>1</SUB>/n with two formula units in the cell of dimensions a = 9.819(3) Å, b = 12.925(4) Å, c = 11.756(4) Å, β = 113.38(3)°, V = 1369.6(8) Å<SUP>3</SUP>. Compounds 1 and 2 display luminescent properties. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)</P> <B>Graphic Abstract</B> <P> <img src='wiley_img/14341948-2005-2005-19-EJIC200500284-fig000.gif' alt='wiley_img/14341948-2005-2005-19-EJIC200500284-fig000'> </P>
V.S. Mironov,Seong Yun Kim,Min Park 한국탄소학회 2013 Carbon Letters Vol.14 No.2
Effects of the amount of nickel powder (Ni) in Ni-carbon fiber (CF) hybrid filler systems on the conductivity(or resistivity) and thermal coefficient of resistance (TCR) of filled high density polyethylene were studied. Increases of the resistivity and TCR with increasing Ni concentration at a given hybrid filler content were observed. Using the fiber contact model, we showed that the main role of Ni in the hybrid filler system is to decrease the interfiber contact resistance when Ni concentration is less than the threshold point. The formation of structural defects leading to reduced reinforcing effect resulted in both a reduction of strength and an increase of the coefficient of thermal expansion in the composite film; these changes are responsible for the increases of both resistivity and TCR with increasing Ni concentration in the hybrid filler system.
Magnetic Force Microscopy (MFM) Study of Remagnetization Effects in Patterned Ferromagnetic Nanodots
Joonyeon Chang,A. A. Fraerman,Suk Hee Han,Hi Jung Kim,S. A. Gusev,V. L. Mironov 한국자기학회 2005 Journal of Magnetics Vol.10 No.2
Periodic magnetic nanodot arrays were successfully produced on glass substrates by interference laser lithography and electron beam lithography methods. Magnetic force microscopy (MFM) observation was carried out on fabricated nanodot arrays. MFM tip induced magnetization effects were clearly observed in ferromagnetic elliptical nanodots varying in material and aspect ratio. Fe-Cr dots with a high aspect ratio show reversible switching of the single domain magnetization state. At the same time, Co nanomagnets with a low aspect ratio exhibit tip induced transitions between the single domain and the vortex state of magnetization. The simple nanolithography is potentially an efficient method for fabrication of patterned magnetic arrays.