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Dissertations / Theses on the topic 'Structural Properties of Molybdenum Dioxide'

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Published: 3 June 2025
Last updated: 31 July 2025

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1

Rafeletos, Georgios. "Structural and synthetic properties of selected heteropoly acids of molybdenum." Thesis, University of Kent, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324662.

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2

Alfredsson, Ylvi. "Electronic and Structural Properties of Thin Films of Phthalocyanines and Titanium Dioxide." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4802.

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3

Halpegamage, Sandamali. "Surface Properties of Titanium dioxide and its Structural Modifications by Reactions with Transition Metals." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6510.

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Surfaces of metal oxides play a vital role in many technologically important applications. The surfaces of titanium dioxide, in particular, show quite promising properties that can be utilized in solid-state gas sensing and photocatalysis applications. In the first part of this dissertation we investigate these properties of TiO2 surfaces through a vigorous surface scientific approach. In the second part, we investigate the possibilities of modifying the TiO2 surfaces by depositing multi-component transition metal oxide monolayers so that the properties of bare TiO2 surface can be influenced i
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4

Moret, Mona P. "Optical properties and structural characterization of ceramic crystals, pellets, and laser-ablation-deposited thin films." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-09182008-063604/.

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5

Mowat, John P. S. "Synthesis, characterisation and adsorption properties of metal-organic frameworks and the structural response to functionalisation and temperature." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3195.

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The synthesis of a scandium aluminium methylphosphonate ScAl₃(CH₃PO₃)₆ isostructural to the aluminium methylphosphonate AlMePO-α and with permanent microporosity is reported here for the first time. Structural characterisation of three lanthanide bisphosphonate structures (I,II,III) with the light lanthanides and N,N'-piperazine bis-(methylenephosphonic acid) and its 2-methyl and 2,5-dimethyl derivatives is described. The framework of structure type I shows considerable flexibility upon dehydration with a symmetry change from C2/c, a = 23.5864(2) Å, b = 12.1186(2) Å, c = 5.6613(2) Å, β = 93
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6

Bouchoul, Nassim. "Valorisation du dioxyde de carbone par couplage plasma non-thermique et catalyse." Thesis, Poitiers, 2019. http://theses.univ-poitiers.fr/62720/2019-Bouchoul-Nassim-These.

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Le dioxyde de carbone et le méthane représentent les deux principaux gaz à effet de serre produits par l’Homme. Dans le contexte environnemental actuel, leur valorisation constitue un enjeu scientifique majeur. Cette thèse s’inscrit ainsi dans cet objectif de valorisation du CO2 et du CH4. Pour cela, la réaction de reformage sec du méthane a été réalisée par couplage plasma non-thermique et catalyse. De façon générale, des catalyseurs à base de métaux, comme Ni/Al2O3, sont utilisés lors du couplage plasma-catalyse. Toutefois, les résultats obtenus en termes de conversions et de sélectivités so
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7

Ondzibou, Ninon Gildas. "Computational study of structural, electronic and optical properties of molybdenum chalcogenides." Thesis, 2014. http://hdl.handle.net/10539/14967.

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Based on rst principles calculations the structural, mechanical stability and electronic properties of molybdenum chalcogenides 2H-MoX2 (X = S, Se, Te) have been studied using density functional theory (DFT). The generalized gradient approximation (GGA) proposed by Perdew, Burke and Ernzerhof (PBE) was employed together with the projector augmented plane wave (PAW) method. The van der Waals interactions in the Grimme (DFT-D2) and Lundqvist and Langreth (vdW-DF) approximations have been added on top of PBE or revised PBE in order to take into account the weak interactions between layers of 2H-
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8

Chou, Tien-Pao, and 周天寶. "Study of the Properties of the Molybdenum dioxide Films by Magnetron Sputtering." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/3pf245.

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碩士<br>義守大學<br>材料科學與工程學系<br>105<br>In this study, we prepared Molybdenum dioxide thin films on glass substrate and silicon substrate by RF magnetron sputtering method with added in different oxide content (unadded, 5 sccm, 10 sccm, 15 sccm, 20 sccm). The effect of oxide content and different annealing temperature on the microstructure and electrical of Molybdenum dioxide thin films will be investigated in this study. The surface microstructure is observed by FESEM (Hitachi S-4700). The crystal structure is analyzed by XRD (PANalytical X’Pert PRO) The electrical is tested by Hall effect measurem
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9

Lin, Xia-Wei, and 林霞蔚. "Local electronic and structural properties of defects in molybdenum disulfide." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/fz7f48.

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碩士<br>國立清華大學<br>物理學系<br>107<br>Two-dimensional (2D) materials have become the focus of scientists working on nanomaterials because of its unique properties and potential applications in electronics. The interesting surface and electronic properties of 2D materials have been widely studied and applied to variety of devices. Transition metal dichalcogeniades materials (TMD) currently attract much interest recently in 2D materials which consist of transition-metal atoms sandwiched between two chalcogen atoms. The sample we studied is Molybdenum disulfide grown on highly oriented pyrolytic graphit
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10

Srinivas, G. "Structural, optical and electrical properties of molybdenum silicide thin films." Thesis, 1993. http://localhost:8080/xmlui/handle/12345678/3103.

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11

"Structural and magnetic properties of cobalt doped titanium dioxide." Thesis, 2008. http://library.cuhk.edu.hk/record=b6074668.

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Cobalt doped anatase TiO2 films show room temperature ferromagnetism. Doping was provided by implantation using a MEVVA ion source. The enhancement of ferromagnetic properties was obtained by post-implantation annealing. The microstructure, magnetic properties and the dependence on the annealing conditions have being studied using various characterization techniques. Interestingly, the output referring to the saturation magnetization per Co atom with a value as high as 3.16 muB/Co atom, exceeds considerably that of the bulk cobalt which suggests that contribution to the overall magnetic behavi
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12

Sousa, Pedro Miguel Fortunas Dias 1975. "Chromium dioxide-low temperature thin film growth, structural and physical properties." Doctoral thesis, 2008. http://hdl.handle.net/10451/1562.

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Tese de doutoramento em Física, apresentada à Universidade de Lisboa através da Faculdade de Ciências, 2008<br>Magnetic materials exhibiting a high degree of spin polarization are being actively investigated for their potential use in spintronic devices. Among them, CrO2 is very attractive because it is a half-metal fully spin polarized at the Fermi level with a magnetic moment of 2 µB/f.u. and Curie temperature well above room temperature (RT). Therefore, much effort has been put into developing efficient and controlled methods for preparing CrO2 films which nevertherless has been a difficult
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13

Yin-ChanHuang and 黃胤展. "The Structural and Electrochromic Properties of Molybdenum Trioxide Films Deposited by RF Magnetron Sputtering." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/98747139830762270935.

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碩士<br>國立成功大學<br>材料科學及工程學系碩博士班<br>98<br>Electrochromisms had been widely investigated as a new energy harvesting material due to its potential applications for smart window of architecture, automobile glazing to save energy, modulate the transmission of light and solar radiation and also liquid crystal displays. Therefore, the object of this study was focused on the effects of sputtering conditions on the composition, microstructure and electrochromic properties of molybdenum trioxide films prepared by r.f. magnetron sputtering. Experimental results indicated that with increasing oxygen partial
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14

Baumann, Melissa Grace Donaghue. "Spectroscopic and structural properties of molecular solid solutions between photoluminescent quadruply-bonded molybdenum and tungsten compounds." 1993. http://catalog.hathitrust.org/api/volumes/oclc/30056560.html.

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15

Villamagua, Conza Luis Miguel, Pietro Pantano, Manuela Carini, and Arvids Stashans. "Study of the electronic and structural properties of tin dioxide and armchair graphene nanoribbons." Thesis, 2016. http://hdl.handle.net/10955/1461.

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Scuola di Dottorato "Archimede" in Scienze, Comunicazione e Tecnologie, Indirizzo:Scienze e Tecnologiie Complessi, Ciclo XXVIII, a.a. 2015-2016<br>This dissertation is focused on the study of the electrical and structural properties of two emerging materials, the tin dioxide (SnO2) and graphene, which have attracted the interest of the semiconductor-device community due to their extraordinary characteristics. The SnO2 has been studied by means of ab initio simulations (Vienna ab initio Simulation Package, VASP). Both n-type and p-type conductivities were investigated. The intrinsic n-type con
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16

Nubi, Olatunbosun Owolabi. "Single and double doping of nanostructured titanium dioxide with silver and copper : structural, optical and gas-sensing properties." Thesis, 2016. http://hdl.handle.net/10386/1749.

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Thesis (Ph. D. (Physics)) -- University of Limpopo, 2016.<br>Single and double doped nanometric powders of Single and double doped nanometric powders of titanium dioxide (TiO2) were synthesised by the sol-gel process using titanium isopropoxide (TTIP) as the precursor. For comparison, an undoped sample was also prepared. The metal dopants, Ag and Cu, were used at doping levels of 5% molar weight. The samples were dried at 100°C in air and post annealing was done at 300°C, 600°C, 900°C and 1100°C. Structural characterisation of the samples was carried out by X-ray Diffraction (XRD), Raman Spe
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17

Mwakikunga, Bonex Wakufwa. "Nano-size effects on optical, structural and phononic properties of VO2 and WO3 by ultrasonic-nebulizer spray pyrolysis technique." Thesis, 2007. http://hdl.handle.net/10539/2082.

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Student Number : 0420699F - MSc Dissertation - School of Physics - Faculty of Science<br>This dissertation presents for the first time the conditions for the synthesis of VO2 by ultrasonic nebula-spray pyrolysis (UNSP) from a precursor solution of NH4VO3+VCl3 optimized as follows: a carrier gas of argon at a flow rate of 11 liters per minute, a furnace temperature of 400 to 700oC. This work also incorporates thermodynamic variables of Tpr-P-V into the equations that relate the mean diameter of droplets, D, to frequency of the exciting ultrasound waves, f, the density of the precursor s
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18

Birhanu, Mulatu Kassie, and Mulatu Kassie Birhanu. "Electrocatalytic Reduction of Carbon Dioxide Using Supported Bimetallic Electrocatalysts by Tuning the Composition and Structural Properties of Metal Nanoparticles." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/44ndpp.

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博士<br>國立臺灣科技大學<br>化學工程系<br>107<br>Emissions of CO2 from various types of industries, power plants, vehicles and many other factories are increasing and becomes one of the causes of global warming together with chlorofluorocarbons (CFCs), methane, ozone, nitrous oxide and others. Global warming provokes melting of polar ice, the increment of atmospheric temperature, expansion of dissertation and impact of human health. Even though there are different techniques for mitigation of CO2, electrochemical reduction (ECR) of CO2 is the interesting field of study for this work. In the literature part
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19

MEI-CHI, HUANG, and 黃媚琦. "Synthesis, Structural Characterization and Properties of Metal Coordination Polymers with 4,4’-bipyridyl-N,N’-dioxide (bpno) and Oxygen-Containing Ligands." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/32656371422636674065.

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碩士<br>東吳大學<br>化學系<br>103<br>ABSTRACT This thesis describes the synthesis, structural characterization and thermal stability of ten metal coordination polymers by using different metal ions with 4,4’-bipyridyl-N,N’-dioxide (bpno) and oxygen-containing or nitrogen-containing ligands, including KNCS (Potassium thiocyanate), Na2BDC (Terephthalic acid , disodium salt), K22,6-NDC (2,6-Naphthalenedicarboxlic acid, dipotassium salt), H2C4O4 (3,4-Dihydroxy-3-cyclobutene-1,2-dione), Na2C5O5 (Croconic acid, disodium salt). All of them were prepared in conventional solution method and fully characterized
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20

Hsu, Min-Ssu, and 許民賜. "Effects of Plastic-based Electrospun Titanium Dioxide Nanofiber Photoanodes and its Structural Design on the Photovoltaic Properties of Flexible Dye-Sensitized Solar Cells." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/sqrzjf.

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碩士<br>國立高雄應用科技大學<br>化學工程與材料工程系博碩士班<br>102<br>In this study, we fabricated the photoanodes of different structures in the flexible dye-sensitized solar cells (TiO2-PL-ITO-PEN/N719/Pt-ITO -PEN or TiO2-PL-TiO2-CL-ITO-PEN/N719/Pt-ITO-PEN SC) by using sandwich assembling technique. The TiO2 compact layer (TiO2-CL) was first deposited on the ITO-PEN by radio frequency sputtering. The titanium dioxide nanofiber (TiO2 NF) was fabricated by electrospinning. The binder-free TiO2 pastes were prepared by mixing TiO2 NF and different weight ratios of commercial P60 TiO2 and P25 TiO2. The porous TiO2 layer
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