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Oxide Structure (oxide + structure)

Distribution by Scientific Domains

Physics and Astronomy	50%
Polymers and Materials Science	25%
Chemistry	25%

Selected Abstracts

Mo2P4O15 , The Most Complex Oxide Structure Solved by Single Crystal Methods?

CHEMINFORM, Issue 10 2005
Sarah E. Lister
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

The Patterning of Sub-500 nm Inorganic Oxide Structures,

ADVANCED MATERIALS, Issue 14 2008
Meredith J. Hampton
Elastomeric perfluoropolyether molds are applied to pattern arrays of sub-500 nm inorganic oxide features. This versatile soft-lithography technique can be used to pattern a wide range of materials; in this work inorganic oxides including TiO2, SnO2, ZnO, ITO, and BaTiO3 are patterned on a variety of substrates with different aspect ratios. An example of TiO2 posts is shown in the figure. [source]

A General Single-Source Route for the Preparation of Hollow Nanoporous Metal Oxide Structures,

ANGEWANDTE CHEMIE, Issue 38 2009
Lianzhou Wang Dr.
Löchrige Schale: Nanoporöse hohle Strukturen werden durch kontrollierte Zersetzung und Auflösung hergestellt. Die partielle thermische Zersetzung von Übergangsmetallsalzen erzeugt eine Metalloxidschale auf der Oberfläche der Metallsalzpartikel. Waschen mit Säure entfernt die Metallsalz-Kerne, und es entstehen hohle nanoporöse Metalloxidschalen (siehe Bild). Diese neue Strategie bietet eine templatfreie Route zu hohlen Strukturen ausgehend von einer einzigen Substanzquelle. [source]

Initiating electropolymerization on graphene sheets in graphite oxide structure

JOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 10 2010
Ali Eftekhari
Abstract Because of its special chemical composition, graphite oxide has peculiar influences on electrochemical processes. The existence of various functional groups significantly affects electropolymerization processes and the formation of conductive polymers. Electrochemical synthesis of polyaniline (as a prototype of conductive polymers) on a paste-based substrate of graphite oxide was investigated. In this case, the electropolymerization is significantly different from conventional cases, and the polymer is generated just during the first potential cycle. This can be attributed to the fact that graphite oxide can assist the monomer oxidation. Alternatively, electropolymerization was successfully performed inside the graphite oxide layers via electrochemical treatment of aniline-intercalated graphite oxide in the supporting electrolyte. Although these phenomena are related to the chemical composition of graphite oxide, the graphite prepared by the reduction of graphite oxide also displayed some advantages for the electropolymerization (over natural graphite). There is an emphasis on the morphological investigations throughout this study, because novel morphologies were observed in the system under investigation. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2204,2213, 2010 [source]

Si/SiO2 nanocomposite by CVD infiltration of porous SiO2

PHYSICA STATUS SOLIDI (A) APPLICATIONS AND MATERIALS SCIENCE, Issue 8 2005
G. Amato
Abstract The aim of the present paper is to report first results on an innovative method for producing Si/SiO2 nanocomposites. Starting from a porous oxide structure, we infiltrated Si by Chemical Vapour Deposition of SiH4, under controlled conditions. In this way, we succeeded in infiltrating Si into the SiO2 template. Porous oxide is obtained by dry oxidation of mesoporous Si. By means of the electrochemical process used for producing porous Si, an interconnected pore structure is obtained. This allows for Si infiltration, giving rise, in principle, to an interconnected network of Si crystallites, in which electrical carriers are easily driven. Efficient charge injection in Si nanocrystals is of crucial importance for several applications, from electroluminescence to memory devices. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Characterizations of nanostructured silicon-carbon films deposited on p-layer by PECVD

PHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 3-4 2010
U. Coscia
Abstract Nanostructured silicon carbon films composed of silicon nanocrystallites embedded in the amorphous silicon carbon matrix are prepared by a rf-PECVD system at 250 °C from silane and methane gas mixture highly diluted in hydrogen onto 7059 Corning glass and p-layer deposited on tin oxide substrates by varying rf power from 25 to 65 W. The structural and compositional properties of the films have been investigated. The study demonstrates that rf power controls the crystalline fraction as well as the silicon crystallite size and that p-layer/tin oxide structure enhances the nucleation of silicon grains as compared to Corning glass (© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Room temperature gas sensor based on porous silicon/metal oxide structure

PHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 6 2007
V. M. Arakelyan
Abstract N-type TiO2,x and In2O3 · SnO2 thin films were deposited onto p-type porous silicon layer which was formed by common electrochemical anodization. The current-voltage characteristics of obtained structures and sensitivity to different concentrations of hydrogen in air were studied. Measurements were carried out at room temperature. As shown results of measurements, an exponential growth of the current in forward branch of the current-voltage characteristics of the device made of TiO2,xlayer was detected. Higher sensitivity to hydrogen of the TiO2,x -porous silicon sensor in comparison to structure made of In2O3 · SnO2 film was detected at room temperature (without preheating of work body of the sensor). (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Influence of solution concentration and temperature on the aqueous chemical growth of zinc oxide structures

PHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 10 2008
D. Vernardou
Abstract ZnO was deposited on Corning glass using an equimolar aqueous solution of zinc nitrate hexahydrate and hexamethylenetetramine by Aqueous Chemical Growth. The morphological characteristics of the as-grown ZnO structures can be varied by adjusting the precursor solution concentration and solution temperature. An increase in the precursor solution concentration induces a modification in the ZnO morphology from sub-microrod to flower-like and microrod structures. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]