organic layered metal oxide hybrids
metal oxide nanoparticles in organic solvents
... in Chapter Chapter and are fully dedicated to the synthesis of metal oxide nanoparticles and metal oxide- based organic- inorganic hybrids, involving surfactant-assisted (Chapter 3) and surfactant-free ... or a metal organic compound such as an alkoxide Metal alkoxides are the most widely used precursors, because they react readily with water and are known for many metals [47, 6] Some alkoxides, ... organometallic compounds are defined as having a direct metal- carbon bond, whereas metal organic compounds have a metal- hetero atom (usually oxygen) bond between the metal center and the organic...
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Solution processed metal oxide interfacial layers for organic solar cells
... that occur when a metal or occurs inorganic semiconductor is brought in contact with an OSC ICT theorises charge transfer across the OSC/inorganic semiconductor or organic/ metal interface when ... Molybdenum Oxide Interfacial Layer for Organic Solar Cells", K H Wong, K Ananthanaranayan, P Balaya, J Phys Chem C, 2012 (116) 16346 Conference Participations “Solution Processed Metal Oxide Interfacial ... extraction layer 25 2.9 Motivation 27 2.9.1 Metal oxides interfacial layers 27 2.9.2 Solution processing metal oxide interfacial layers 28 2.9.3 Objective of This Work...
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chemical sensing and catalysis by one - dimensional metal - oxide nanostructures
... pyroelectric, and luminescence properties of metal oxides (4, 12–14) Chemical and biological sensors having nanostructured metal oxides and especially metal- oxide nanowires benefit from the comprehensive ... quasi-one-dimensional metaloxide nanostructures already reported (see reviews 16, 17) (A) nanowires and nanorods; (B) core-shell structures with metallic inner core, semiconductor, or metal- oxide; (C) nanotubules/nanopipes ... sensitivity (reactivity) PHOTOCHEMICAL PROPERTIES OF INDIVIDUAL METAL- OXIDE NANOWIRES The photochemical and photophysical properties of metal- oxide nanoparticles and materials fabricated from them have...
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conduction model of metal oxide gas sensors
... r r r Fig Schematic layout of a typical resistive gas sensor The sensitive metal oxide layer is deposited over the metal electrodes onto the substrate In the case of compact layers, the gas cannot ... reaction where kreac is the reaction constant for carbon dioxide production One also considers that the concentration Conduction Model of Metal Oxide Gas Sensors 153 Fig 10 Literature survey of species ... overall sensor resistance Conduction Model of Metal Oxide Gas Sensors 163 Fig 14 Situation before (left) and after contact (right) between the metal electrode and the semiconductor in Case (for...
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ethanol interference in light alkane sensing by metal-oxide solid solutions
... of nanostructured metal oxides for gas sensing applications Please cite this article in press as: M.C Carotta, et al., Ethanol interference in light alkane sensing by metal- oxide solid solutions, ... modulation in iron doped tin oxide sensors, Sens Actuators B: Chem 115 (2006) 610–615 [5] M.C Carotta, A Cervi, A Giberti, V Guidi, C Malagù, G Martinelli, D Puzzovio, Metal- oxide solid solutions for ... of propane sensing with tin dioxide based sensors, Sens Actuators B: Chem 108 (2005) 75–83 [3] D.P Mann, T Paraskeva, K.F.E Pratt, I.P Parkin, D.E Williams, Metal oxide semiconductor gas sensors...
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hybrid metal oxide and multiwall carbon nanotube films for low temperature gas sensing
... the matrix of metal oxide Based on these results, the modulation of the width of two depletion layers existing at the surface of metal oxide grains and at the interface of metal oxide grains and ... depletion layers is located at the surface of the grains of the metal oxide film and the second type at the interface between MWCNTs and metal oxide films Considering the sensitivity of hybrid films (see ... can be derived that the adsorption of NO2 at the metal oxide modifies the depletion layer at the surface of its grains and also at the n -metal oxide/ p-MWCNTs heterostructures This combined effect...
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new technology of metal oxide thin film preparation for chemical sensor application
... ion-beam or rf sputtering from metallic or metal oxide targets Two different special regimes can be used In the first one the formation of “extra” interfaces in the body of the metal film occurs as a result ... well [26] Among metal oxide semiconductors, tungsten oxide is a promising material for gas sensing Several studies have shown that it can be used for the detection of nitrogen oxide (NO and NO2 ... trimmer for metal oxide gas sensors, Sens Actuators, B Chem 65 (2000) 258–262 M Fleischer, S Kornely, T Weh, H Meixner, Selective gas detection with high-temperature operated metal oxides using...
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quasi - one dimensional metal oxide semiconductors
... nano-optoelectronic devices Applications of metal oxide nanostructures 6.1 Metal oxide gas sensors Metal oxides semiconductors are normally high gap metal oxides in which the semiconducting behavior ... a single material is the sequential oxidation of metal nanowires Arrays of metal metal oxide core–shell nanowires and single-crystalline metal oxide nanotubes have been obtained [155] The process ... 1D metal oxide nanostructures 22 Preparation of quasi 1D metal oxide heterostructures 24 Applications of metal...
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quasi - one - dimensional metal oxide materials — synthesis, properties and applications
... sensing based on metal oxide nanowires, such as zinc oxide (ZnO), tin oxide (SnO2), indium oxide (In2O3) aluminum oxide (Al2O3), gallium oxide (Ga2O3), tungsten oxide (WO3), and vanadium oxide (V2O5) ... heterostructured metal oxide nanowires start to attract much attention Several types of core/shell structure have been synthesized, such as semiconductor /oxide [119], metal/ oxide [120], oxide/ oxide [114,121,122], ... crystalline structures since the 1970s This process begins with aqueous mixture of soluble metal salt (metal and/or metal organic) of the precursor materials Usually the mixed solution is placed in an autoclave...
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semiconducting metal oxide sensor array for the selective detection of combustion gases
... selected metal oxide sensors to identify the gases under tests by means of pattern recognition and classification techniques Experimental 2.1 Fabrication of thick-film sensor arrays Porous metal oxide ... sensitive film To form the film, a drop of metal oxide paste was applied onto the electrodes Pastes were prepared by mixing oxide powders with a glass frit and an organic binder Nanosized powders of ... insight to the feasibility of this sensor design modification, a large variety of semiconductor metal oxides traditionally employed in gas-sensors have been tested at different operating temperatures...
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Báo cáo hóa học: " A general strategy for synthesis of metal oxide nanoparticles attached on carbon nanomaterials" pptx
... connecting metal ions and CNMs Our methods can be applicable for a large variety of metal ions By adopting bi -metal or even tri -metal precursors in a certain mole ratio, composite oxide nanocrystals ... http://www.nanoscalereslett.com/content/6/1/71 Page of Figure TEM images of various metal oxide NPs of Fe2O3, SnO2, CeO2, and TiO2 on a few-layer graphene earth metal oxides on MWNTs See Additional file (SI 5) for more details ... Nanocomposites of Metals, Metal Oxides, and Carbon Nanotubes via Self-Assembly J Am Chem Soc 2007, 129:9401 14 Wang D, Li ZC, Chen LW: Templated Synthesis of Single-Walled Carbon Nanotube and Metal Nanoparticle...
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preparation and functionalization of macromolecule-metal and metal oxide nanocomplexes for biomedical applications
... of metal or metalloid elements surrounded by various types of ligands Metal alkoxides belong to a family of organometallic compounds which contain an organic ligand attached to the metal or metalloid ... Conjugation….36 2.5.2.2 Carboxylic Acid Functional Poly(ethylene oxide) …………… 39 2.5.3 Functional Poly(ethylene oxide) and Routes to Metal/ Metal Oxide Stablilization……………………………………………………………….39 2.5.3.1 ... P.O Box 1346 Ann Arbor, MI 48106-1346 Preparation and Functionalization of Macromolecule -Metal and Metal Oxide Nanocomplexes For Biomedical Applications Michael L Vadala Abstract Copolymer-cobalt...
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Binary metal oxide and polymer based liquid repellent self cleaning surfaces
... References 30 and 31) 4.2.1.4 Inorganic materials: Superhydrophobic properties have been exhibited by a few inorganic materials as well Recent research work conducted on oxides such as ZnO and TiO2 ... roll over the surfaces thereby cleaning them However, the hydrophilic coatings using suitable metal oxides have an additional property of chemically breaking down the complex dirt deposits by a ... mechanism Both hydrophilic and hydrophobic surfaces involve the application of nanostructures (metal oxide/ polymer) to achieve the self-cleaning phenomenon Recent reports state that by applying...
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Transition metal oxide based nanaostructures as supercapacitor electrodes
... transition -metal- oxide- based nanostructures, manganese dioxide nanostructures, ruthenium oxide nanotubes, as well as composite materials consisting of transition metal oxide and reduced graphene oxide ... Ru(IV)/Ru(III) In addition to ruthenium oxides, the promising materials providing a pseudocapacitive property are metal oxides (e.g manganese oxide, cobalt oxide, nickel oxide) (Toupin et al., 2004; Zhao ... process Ruthenium oxides, manganese oxides, vanadium pentoxide, nickel oxides, cobalt oxides et al have been investigated as electrode materials for supercapacitor applications Ruthenium -oxide- based...
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Synthesis of metal oxide nanostructures and their applications as lithium ion battery anodes
... problems of these two oxides The detailed descriptions on both metal oxides are mentioned below 1.3.2 TIN OXIDES AS ANODE MATERIALS Tin oxides, including Tin(II) Oxide and Tin(IV) oxide, both show ... REVIEW OF METAL OXIDE ANODE MATERIALS 1.3.1 OVERVIEW Metal oxides have been proposed as potential LIB anode materials due to their advantages Firstly, the most attractive feature of metal oxides ... the usage of metal oxides as anode materials also faces several difficulties Firstly, metal oxides are generally semiconductors with poor conductivities.[48] Secondly, most metal oxides also suffer...
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Nanostructured metal oxide materials for dye sensitized solar cells
... present, titanium dioxide (TiO2) gives the highest recorded efficiencies [33], but many other metal oxide systems, such as zinc oxide (ZnO) [34], tin oxide (SnO2) [35], niobium oxide (Nb2O5) [36] ... doped tin oxide (FTO) back electrode In DSSC, the electricity is generated on the photoelectrode, which consists of a nanoporous network of metal oxide semiconductor This film of metal oxide is ... collection of injected electrons Metal oxide films are commonly synthesized through a solution based 14 method Low cost, good availability and non-toxic nature of metal oxides make them even more attractive...
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Defect engineering in the formation of ultra shallow junctions for advanced nano metal oxide semiconductor technology
... Technology Roadmap for Semiconductors I-V Current –Voltage MOSFET Metal- Oxide- Semiconductor Field Effect Transistor N Nitrogen NMOS N-type Metal- Oxide- Semiconductor Ns Active Carrier Concentration NV Nitrogen-Vacancy ... for USJ fabrication 36 Chapter 2 2.2 Architecture of Metal- Oxide- Semiconductor (MOS) Devices Figure 2.1 shows the typical structure of metal- oxide- semiconductor field effect transistor (MOSFET) ... physical thickness Similarly, other potential high-K materials such as hafnium oxide, zirconium oxide and rare earth elements oxide are c under active research and development for the application in...
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Development of semiconductor metal oxide gas sensors modified by mesoporous silica materials
... Zirconium oxides (2%) Mixed oxides (15%) Aluminum oxides (2%) Zinc oxides (10%) Cerium oxides (2%) Copper oxides (2%) Gallium oxides (3%) Tungsten oxides oxide (7%) Indium oxides (5%) Titanium oxides ... component is made up of mostly semiconductor metal oxide Materials such as tin oxide (SnO2), zinc oxide (ZnO), titanium oxide (TiO2) and tungsten oxide (WO3) have been used by most researchers ... observed are nitric oxide (NO), nitrogen dioxide (NO2), carbon monoxide (CO), carbon dioxide (CO2), hydrogen sulfide (H2S), sulfur dioxide (SO2), ozone (O3), ammonia (NH3), and organic gases such...
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Engineering of binary metal oxide nanostructures for highly efficient and stable excitonic solar cells
... of metal oxides and orbital energies of some of the organic components used in OSCs Modified / redrawn from [52,53] P-type transition metal oxides have been successfully incorporated in OSCs Metal ... poly(styrenesulfonate) Si Silicon SnO2 Tin Oxide SrTiO3 Strontium Titanate TiO2 Titanium di -Oxide V2O5 Vanadium Pentoxide Voc Open Circuit Voltage WO3 Tungsten Oxide ZnO Zinc Oxide xix LIST OF PUBLICATIONS ... electrode, typically a conducting oxide such as indium-tin oxide (ITO), two organic light-absorbing layers, and a second electrode The two organic layers are made of different organic semiconductors, one...
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Transition metal oxide nanostructures shape controlled synthesis, characterizations and studies of physical properties
... properties of various metal oxide nanostructure arrays Nanostructures of zinc oxides, 29 Chapter Introduction to Metal Oxide Nanostructures molybdenum oxides, tungsten oxides and niobium oxides are found ... the metal oxides, including SnO2, In2O3, and ZnO Deviations in the properties of metal oxides due to the adsorption of specific gases render them as potential gas sensors Transition metal oxides, ... structure) provide the metal oxides with different electrical behavior Studies suggested that for most of the 16 Chapter Introduction to Metal Oxide Nanostructures nanostructured metal oxides investigated,...
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