Preliminary results on the fabrication of a memristive device made of zinc oxide (ZnO) over a mesoporous silicon substrate have been reported. Porous silicon (PS) substrate is employed as a template to increase the formation of oxygen vacancies in the ZnO layer and promote suitable grain size conditions for memristance. Morphological and optical properties are investigated using scanning electr...

Presented here is a heterometallic organic framework [Na(2)(H(2)O)(10)](n)[CuZn(4)(mu(3)-OH)(4)(btec)(2)](n).2nH(2)O (1, btec = 1,2,4,5-benzenetetracarboxylate) that incorporates mixed Cu(2+)-Zn(2+) oxide chains and accommodates Na(+) cations as extraframework guest species; such a building mode is comparable to that of aluminosilicate zeolites where the porous framework combines two kinds of s...

In this work we report on temperature-dependent photoluminescence measurements (15-300 K), which have allowed probing radiative transitions and understanding of the appearance of various transitions. We further demonstrate that transitions associated with oxide in SiNCs show characteristic vibronic peaks that vary with surface characteristics. In particular we study differences and similarities...

We demonstrate the fabrication of 2-D arrays of nanopillars made from perfluoropolyether derivatives using a porous anodic aluminum oxide membrane as a template. Pretexturing the aluminum prior to anodization enables one to engineer multiple morphological length scales and thereby synthesize a lotus-leaf-like topography. Both nanopillars on a flat surface and on a lotus-leaf-like topology exhib...

A mathematical model to calculate the volume specific three-phase boundary length in the porous composite electrodes of solid-oxide fuel cell s presented. The model is exclusively based on geometrical considerations accounting for porosity, particle diameter, particle size distribution, nd solids phase distribution. Results are presented for uniform particle size distribution as well as for non...

1) Institute of Zoology, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84506 Bratislava, Slovakia (e-mail: [email protected]) 2) University of Trnava, Faculty of Education, Department of Biology, Priemyselná 4, P.O. Box 9, SK-91843 Trnava, Slovakia (e-mail: [email protected]) 3) Estación Experimental de Zonas Áridas (CSIC), Departamento de Ecología Funcional y Evolutiva, General S...

Abstract The eventual aim of this research work was to develop a new low-cost synthesis route produce ultralight aluminum oxide ceramic fibers for high temperature insulation. This paper mainly focuses on the application Al 2 O 3 as insulation materials in space vehicles. study extended check during launch and conditions by satellite test. were monitored thermo-vacuum vibration tests before lau...