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INVESTIGATION OF ELECTRONIC AND MAGNETICPROPERTIES OF MN-DOPED GE(111) AND Ε-GASE(0001) SURFACES

DASH, SIBASHISA2012-07-20Archivio Istituzionale della Ricerca (Universita Degli Studi Di Milano)

In this thesis an investigation of the electronic and magnetic properties of Mn:Ge(111) and Mn:GaSe (0001) interfaces is presented. These materials are relevant for potential applications in the field of spintronics. After an introduction to the physics of these systems (Chapter 1), in Chapter 2, the experimental and…

Inorganic Fluorides and Related CompoundsMagnetic Field Sensors TechniquesZnO doping and properties

氧化锌纳米棒形貌对ZnO/Cu 2 O异质结太阳能电池光伏性能的影响

Haoming Wei、Ling Chen、Gong Hai-Bo 等 4 位作者2012-07-20Journal of Inorganic Materials

采用电化学沉积法制备了ZnO纳米棒, 首先讨论了电化学沉积参数对氧化锌(ZnO)纳米棒形貌的影响, 并对不同长度ZnO纳米棒的光吸收和反射等性质进行了研究. 实验发现沉积时间是影响纳米棒长度、直径的重要因素, ZnO纳米棒的微观形貌对其光学性质有重要影响. 然后以氧化锌纳米棒为n型材料, 以氧化亚铜为p型材料, 通过电化学沉积法构筑了ZnO/Cu 2 O异质结太阳能电池, 并测试了其光伏性能, 研究表明增长纳米棒阵列的长度使得开路电压、短路电流密度及光电转换效率等性能得到提升. 最后, 综合分析了氧化锌纳米棒形貌与所组装电池的性能之间的关系, 发现调控氧化锌纳米棒的形貌是提高ZnO/Cu 2 O异质结太阳能电池光伏性能的有效途径.

Solar-Powered Water Purification MethodsCopper-based nanomaterials and applicationsSupercapacitor Materials and Fabrication

Υπολογιστική μελέτη του γραφενίου από πρώτες αρχές

Sarantopoulou, Smaragda P.2012-07-20DSpace - NTUA (National Technical University of Athens)

Η νανοτεχνολογία χαρακτηρίζεται ως η επιστήμη του μέλλοντος. Είναι μια νέα προσέγγιση για την κατανόηση και την άρτια γνώση των ιδιοτήτων της ύλης σε νανοκλίμακα. Στο επίπεδο αυτό αποκαλύπτονται διαφορετικές και συχνά καταπληκτικές ιδιότητες της ύλης. Είναι συχνές οι αναφορές στο «ρηξικέλευθο» ή «επαναστατικό» δυναμικ…

Material Selection and PropertiesPigment Synthesis and PropertiesFiber-reinforced polymer composites

ΣΧΕΔΙΑΣΜΟΣ ΥΠΟΣΤΕΓΟΥ ΝΑΥΠΗΓΗΣΗΣ

Voulomenos, Ioannis D.、Gidas, Sotirios G.2012-07-20DSpace - NTUA (National Technical University of Athens)

Αντικείμενο της συγκεκριμένης διπλωματικής εργασίας είναι η διαδικασία σχεδιασμού και διαστασιολόγησης ενός σχετικά μεγάλου έργου με φέροντα οργανισμό από χάλυβα με την χρήση ενός εμπορικού προγράμματος ανάλυσης και διαστασιολόγησης (SAP2000), καθώς επίσης ο σχολιασμός των διαφόρων παραμέτρων σχεδιασμού. Η ανάλυση και…

Material Selection and PropertiesInnovations in Concrete and Construction MaterialsRecycling and utilization of industrial and municipal waste in materials production

Comparison of H-Mode Plasmas Diverted to Solid and Liquid Lithium Surfaces

R. Kaita2012-07-20OpenAlex

Experiments were conducted with a Liquid Lithium Divertor (LLD) in NSTX. Among the goals was to use lithium recoating to sustain deuterium (D) retention by a static liquid lithium surface, approximating the ability of flowing liquid lithium to maintain chemical reactivity. Lithium evaporators were used to deposit lith…

Fusion materials and technologiesParticle accelerators and beam dynamicsMagnetic confinement fusion research

PENGARUH KOMPOSISI ADITIF DAN PENGADUKAN TERHADAP STRUKTUR POLYURETHANE FOAM DARI POLYOL BERBASIS CASTOR OIL

M.Eng Ir. Sumarno、St Eva Oktavia Ningrum2012-07-20OpenAlex

Polyurethane foam merupakan polimer seluler yang disintesa dari reaksi kimia antara polyol dan isocyanate. Tujuan penelitian ini adalah mempelajari pengaruh chain extender berupa ethylene glycol (EG), surfaktan berupa silicone glycol (SG), dan tipe pengadukan terhadap struktur polyurethane foam berbasis castor oil (CO…

Polymer Science and PVCPolymer composites and self-healingPolymer Foaming and Composites

PERENCANAAN DAUR ULANG CAMPURAN DINGINPADA PERKERASAN LAMA SEBAGAI ALTERNATIFPENINGKATAN STRUKTUR LAPIS PONDASI ATAS(STUDI KASUS JALAN PANTURA)

Mokhammad Asep Wildan2012-07-20OpenAlex

Jalur jalan pantai utara pulau jawa (Pantura) merupakan jalur transportasi strategis dan ekonomis dengan volume lalu lintas padat dan beban kendaraan tinggi. Permukaan jalan yang ada merupakan lapisan beraspal yang cukup tebal hasil pelapisan(overlay) beberapa kali dan lapis pondasi jalan yang ada diperkirakan sudah m…

Material Selection and PropertiesGeotechnical and construction materials studiesUrban Transport Systems Analysis

Επίδραση χημικών επιβραδυντών στην ευφλεκτότητα κυτταρίνης με χρήση της μεθόδου Limiting Oxygen Index (L.O.I.)

Giannadakis, Georgios S.2012-07-20DSpace - NTUA (National Technical University of Athens)

Στη παρούσα διπλωματική εργασία μελετάται η καύση της κυτταρίνης. Η καύση της έγινε με τη μέθοδο Limiting Oxygen Index και καταγράφηκε ο δείκτης ελαχίστου οξυγόνου της κυτταρίνης. Η καύση της κυτταρίνης επαναλήφθηκε μετά την εφαρμογή επιβραδυντών. Χρησιμοποιήθηκαν τέσσερις επιβραδυντές: όξινο φωσφορικό διαμμώνιο (DAP)…

Thermochemical Biomass Conversion ProcessesThermal and Kinetic AnalysisSubcritical and Supercritical Water Processes

(Cinnamato-κ2O,O′)(5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane-κ4N,N′,N′′,N′′′)nickel(II) perchlorate monohydrate

Qiang Gao、Yicheng Cao2012-07-20Acta Crystallographica Section E Structure Reports Online

In the title compound, [Ni(C(9)H(7)O(2))(C(16)H(36)N(4))]ClO(4)·H(2)O, the macrocyclic 5,5,7,12,12,14-hexa-methyl-1,4,8,11-tetra-aza-cyclo-tetra-decane ligand (L) folds around the Ni(II) atom, which is also chelated by the carboxyl-ate group. The geometry is a distorted N(4)O(2) octa-hedron. In the crystal, adjacent m…

Crystal structures of chemical compoundsLanthanide and Transition Metal ComplexesMetal complexes synthesis and properties

Ελεγχος Ιδιοτήτων Ντήζελ/ Βιοντήζελ σε Υψηλές Συγκεντρώσεις Βιοντήζελ

Kontozoglou, Evangelia T.2012-07-20DSpace - NTUA (National Technical University of Athens)

Στην εργασία αυτή έγινε έλεγχος των κυριότερων ιδιοτήτων μιγμάτων ντήζελ/ βιοντήζελ, σε υψηλές περιεκτικότητες βιοντήζελ. Η συνεχής αύξηση της απαιτούμενης περιεκτικότηας των καυσίμων σε βιοντήζελ οδηγεί στην ανάγκη εξερεύνησεις των ιδιοτήτων αυτών των μιγμάτων, ώστε το τελικό καύσιμο να είναι εντός των περιβαλλοντικώ…

Polymer Foaming and CompositesInjection Molding Process and PropertiesProduct Development and Customization

Σχεδιασμός και κατασκευή ανθρακονημάτινου τιμονιού αγωνιστικού ποδηλάτου

Katsipis, Mark V.2012-07-20DSpace - NTUA (National Technical University of Athens)

Σκοπός αυτής της διπλωματικής εργασίας είναι ο σχεδιασμός και η κατασκευή ανθρακονημάτινου τιμονιού αγωνιστικού ποδηλάτου δρόμου. Ο σχεδιασμός (design) θα γίνει με την βοήθεια του προγράμματος SolidWorks της εταιρίας Dassault Systèmes SolidWorks Corp. . Ο γεωμετρικός σχεδιασμός θα αρχίσει με βάση πέντε υπάρχοντα τιμόν…

Manufacturing Process and OptimizationEngineering and Materials Science StudiesMaterial Selection and Properties

Effect of thermal treatments and Co concentration on the structural and luminescent properties of sputtered TiO2:Co films

J. Carmona‐Rodríguez、F. Rodríguez‐Melgarejo、S. Vargas 等 10 位作者2012-07-20physica status solidi (a)

Abstract Thin films of Co‐doped titania were grown at room temperature by rf reactive co‐sputtering. A post‐growth annealing procedure was carried out at 300, 450, and 750 °C in an inert argon atmosphere. The samples were studied using X‐ray diffraction, micro Raman, UV–Vis, and photoluminescence (PL) spectroscopies.…

Luminescence Properties of Advanced MaterialsElectronic and Structural Properties of OxidesAdvanced Photocatalysis Techniques

Polyquinoxaline Matrix Resins and CompositesAdapted from Polyquinoxaline Matrix Resins and Composites , First Edition.

P. M. Hergenrother、John W. Connell2012-07-20Wiley Encyclopedia of Composites

Abstract Polyquinoxalines (PQs) are heterocyclic polymers that contain the heteroaromatic benzo [α] pyrazine (quinoxaline) ring along the main chain. They represent an important class of polymers that offer high chemical and thermal stability coupled with high mechanical properties. They are potentially useful as func…

Synthesis and properties of polymersEpoxy Resin Curing ProcessesSynthesis and Biological Evaluation

FUNCTIONAL STRUCTURE OF JOINT CAVITY OF FEMOROTIBIAL JOINT OF BOSNIAN AND HERZEGOVINIAN MOUNTAIN HORSE

Rizah Avdić、Faruk Tandir、Pamela Bejdić 等 5 位作者2012-07-20DOAJ (DOAJ: Directory of Open Access Journals)

Abstract – The largest and most complete joint in Bosnian and Herzegovinian mountain horse is knee joint, which consists of two joints: femoropatellar and femorotibial joint. From the point of functional anatomy and due to the load on the knee joint, the study of functional structures of femorotibial joint is of parti…

Shoulder Injury and TreatmentMetal Alloys Wear and PropertiesGear and Bearing Dynamics Analysis

Stainless Steel Polymer Composites

Farid Akhtar2012-07-20Wiley Encyclopedia of Composites

Abstract In electronic, automotive, medical, and aerospace industries, electrostatic discharge (ESD) control and electromagnetic interference (EMI) shielding are important design considerations. Conductive polymer composites are well researched and commercially available materials for ESD control and EMI shielding. Se…

Smart Materials for ConstructionElectromagnetic wave absorption materialsElectrostatic Discharge in Electronics

Thermal and Mechanical Properties of Copper–Carbon Composites in Electronic Packaging

N. Chandra、Jean‐François Silvain、Amélie Veillère 等 4 位作者2012-07-20Wiley Encyclopedia of Composites

Abstract In the field of power electronics, thermal management of silicon chips plays a key role in our ability to increase their performance. It is necessary to dissipate the excess heat in order to prevent heating and consequent deterioration of silicon chips. In this article, we mainly focus on understanding the th…

Thermal properties of materialsAluminum Alloys Composites PropertiesElectronic Packaging and Soldering Technologies

Measurement of energy spectra on irradiated polycrystalline UO 2 samples using secondary ion mass spectrometry

I. Roure、B. Pasquet、L. Desgranges 等 4 位作者2012-07-20Surface and Interface Analysis

The energy spectrum of uranium in irradiated fuels is known to give key information on the oxidation state of uranium at the sample surface. In this respect, it is essential to know the operating conditions applied to measure energy spectra by secondary ion mass spectrometry in order to obtain reliable data. Using a f…

Radioactive element chemistry and processingNuclear reactor physics and engineeringNuclear Materials and Properties

Growth of ZnO Nanostructures by the Reaction of ZnO Powder with Carbon Monoxide

Sang-Won Seo、Woo‐Sik Jung2012-07-20Bulletin of the Korean Chemical Society

E-mail: wsjung@yu.ac.krReceived March 14, 2012, Accepted April 19, 2012Key Words : Zinc oxide, Nanostructures, Carbon monoxideWurtzite-type zinc oxide (ZnO) is a promising semi-conductor material with a wide bandgap of 3.3 eV at roomtemperature. Recently, ZnO nanostructures have attractedgreat research interest becaus…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsGa2O3 and related materials

On the representation matrices for the symmetric group adapted to electron‐pair and electron‐group wave functions using graphical methods of spin algebras

Stephen Wilson、Ivan Hubač2012-07-20International Journal of Quantum Chemistry

Abstract Using graphical methods of spin algebras, we present a direct method for the determination of the representation matrices of the symmetric group in a basis adapted to electron‐pair and electron‐group wave functions. In particular, we consider nonstandard representations adapted to $S_{n_1 } \times S_{n_2 } \t…

Photonic and Optical DevicesMolecular spectroscopy and chiralityLiquid Crystal Research Advancements

Density Functional Analysis of the Spin Exchange Interactions in VOSb2O4

Hyun‐Joo Koo2012-07-20Bulletin of the Korean Chemical Society

The spin exchange parameters of $VOSb_2O_4$ were evaluated by performing energy-mapping analysis based on density functional calculations. The spin exchange interaction between the nearest-neighbor $V^{4+}$ ions is strongly antiferromagnetic while other interactions are negligible. Thus, the magnetic structure of $VOS…

Advanced Condensed Matter PhysicsCrystal Structures and PropertiesMultiferroics and related materials