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Dissertations / Theses on the topic 'Shell magnets'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Patel, Ketan. "OXIDE BASED MAGNETIC NANOCRYSTALS FOR HIGH-FREQUENCY AND HIGH-ENERGY PRODUCT APPLICATIONS." Master's thesis, Temple University Libraries, 2017. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/464990.

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Mechanical Engineering<br>M.S.M.E.<br>Magnets play a major role in our rapidly developing world of technology. Electric motors and generators, transformers, data storage devices, MRI machines, cellphones, and NMR are some of the many applications for magnets. However, almost all the magnets currently being used have rare-earth heavy metals in them. Despite their high-energy product, the presence of rare-earth metals increases the cost significantly. Also, the processes involved in the mining of rare-earth metals are hazardous to the environment, and to all life forms. In the past few decades,

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2

Brynolf, Max, and Rohini Sengupta. "Magneto-Plasmonic Gold & Nickel Core-Shell Structures." Thesis, Uppsala universitet, Materialfysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-387353.

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The presented project explores the optical properties of magnetoplasmonic Au/Ni core-shell structures. The work aims at controlling dimensions and parameters in order to influence and analyze the optical properties of the nanostructures. The softwares utilized for the simulations were COMSOL Multiphysics 5.1 and MATLAB. Experimental results were acquired from labs done at Ångströms laboratory. From the research based study where the gold to nickel ratio was influenced, it was observed that the transmissions for the nanostructures at the differing wavelengths produced transmissions of similar b

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3

Salabaş, Elena-Lorena. "Structural and magnetic investigations of magnetic nanoparticles and core-shell colloids." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974954314.

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4

Santos, Marcus Carrião dos. "Magnetohipertermia em nanopartículas core-shell." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/6272.

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Submitted by Cássia Santos (cassia.bcufg@gmail.com) on 2016-09-26T11:37:12Z No. of bitstreams: 2 Tese - Marcus Carrião dos Santos - 2016.pdf: 18819776 bytes, checksum: c30d69dcb666acd99ab25efc73f7a96e (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-09-26T12:06:45Z (GMT) No. of bitstreams: 2 Tese - Marcus Carrião dos Santos - 2016.pdf: 18819776 bytes, checksum: c30d69dcb666acd99ab25efc73f7a96e (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made availa

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Cho, Sung-Jin. "Synthesis and characterization of core/shell structured magnetic nanomaterials /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.

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6

Artiomenco, Mitcova Liubov. "Dendritic functionalization of core-shell magnetic nanoparticles for biotechnology." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0025/document.

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Le but de ce travail a été d’élaborer des nanoparticules magnétiques (MNPs) fonctionnalisées avec un groupement maléimide, stables, dispersibles dans l’eau et qui assureront une immobilisation covalente,sélective et efficace de biomolécules. Bien qu’un large choix de MNPs soit disponible dans le commerce, lamodification chimique de surface des MNPs reste une étape indispensable pour l’élaboration de matériauxspécifiques. Un contrôle précis de la fonctionnalisation de surface des MNPs est crucial, car en découlentleurs propriétés physico-chimiques, leur stabilité colloïdale, et la préservation

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7

Shimizu, Daiki. "Chemistry of Stable Open-shell Porphyrinoids." Kyoto University, 2019. http://hdl.handle.net/2433/242629.

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8

Changyong, Lu. "Synthesis and characterization of magnetic nanocomposites and their applications study." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/457572.

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Los nanomateriales, especialmente las nanopartículas, se convierten en una de las áreas más atractivas no sólo en la investigación científica, sino también en las aplicaciones industriales. En esta tesis se ha estudiado la preparación de nanopartículas de magnetita, sus nanocompuestos relacionados y la aplicación de los nanomateriales obtenidos. Las nanopartículas core-shell de Fe3O4@SiO2 se sintetizaron mediante métodos de microemulsión inversa estándar y de microondas. Las nanopartículas obtenidas se caracterizaron con diferentes técnicas de laboratorio y se estudiaron los diferentes efecto

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9

Ceylan, Abdullah. "Core/shell structured magnetic nanoparticles synthesized by inert gas condensation." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 139 p, 2007. http://proquest.umi.com/pqdweb?did=1397915001&sid=7&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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10

Corbi, Fabiana Cristina Andrade 1977. "Sistemas magnéticos multicomponentes nanoestruturados hierarquicamente com propriedades biológicas e luminescentes." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250542.

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Orientador: Italo Odone Mazali<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Química<br>Made available in DSpace on 2018-08-26T13:56:34Z (GMT). No. of bitstreams: 1 Corbi_FabianaCristinaAndrade_D.pdf: 10094232 bytes, checksum: 10529e501237e454e749493b87002f92 (MD5) Previous issue date: 2014<br>Resumo: Na busca de um material multifuncional, esta Tese propõe a síntese de uma nanoestrutura hierárquica caroço@casca, sendo o caroço de magnetita e a casca de sílica mesoporosa. Desta combinação surge uma plataforma magneto-porosa que, além das propriedades magnéticas, pode

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11

Karmarkar, Makarand Anand. "Smart material composites for magnetic field and force sensors." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/34686.

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Piezoelectric material based sensors are widely used in applications such as automobiles, aircraft, and industrial systems. In past decade, attention has been focused on synthesizing composites that can provide multifunctional properties, i.e., same material exhibits two or more properties. In this group of composites, magnetoelectric materials are particularly interesting as they provide the opportunity of coupling magnetic and electric field. Another class of composite materials that are being actively pursued is piezoresistive materials. Piezoresistivity refers to change in resistance with

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12

Mueller, Andre. "Designer 3D magnetic mesostructures." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558883.

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Micro Hall probe magnetometry has been used to investigate the magnetisation of various electrodeposited microcrystals. Superconducting tin crystals of almost perfect square cuboid shapes exhibit a strong size dependence of the supercooling of the superconducting state and, for the smallest accessible crystals, the crossover to the mesoscopic regime can be readily explored close to their critical temperatures. Experimental results are in good agreement with Ginzburg-Landau simulations using the exact experimental parameters. Electroplating of the tin cores with another material provides unique

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13

Knappett, Benjamin Richard. "Preparation of core@shell magnetic nanoparticles and their characterisation by electron microscopy." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709096.

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14

Watson, D. J. "Mineral magnetic and palaeomagnetic properties of continental shelf sediments." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/14648.

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15

Pothayee, Nikorn. "Development of Core-Shell Polymeric Nanostructures for Delivery of Diagnostic and Chemotherapeutic Agents." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/77286.

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Macromolecular complexes of anionic-nonionic block copolymers and cationic antibiotic aminoglycosides have been formed by electrostatic condensation. Amphiphilicity of the complexes was introduced into the shells by incorporating a hydrophobic poly(propylene oxide) segment into the block copolymer. The resulting particles have an average hydrodynamic diameter of ~ 200 nm and contain up to 30-40 % of the drug payload. In vitro efficacies of such nanostructures in reduction of intracellular pathogens like Salmonella, Listeria, and Brucella were demonstrated. Current effort focuses on translation

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16

Balivada, Sivasai. "A/C magnetic hyperthermia of melanoma mediated by iron(0)/iron oxide core/shell magnetic nanoparticles : a mouse study." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2282.

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17

Zhang, Mingfu. "Template controlled synthesis of magnetic, semiconducting nanoparticles within amphiphilic core shell cylindrical polymer brushes." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971864136.

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18

Keser, Sezen Lutfiye. "Preparation Of Gold Decorated Cobalt-silica Core-shell Nanoparticles For Surface Enhanced Raman Scattering Applications." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612383/index.pdf.

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Bringing together several materials into a single nanoparticle is an attractive way to design systems that exhibit diverse physical and chemical properties. Cobalt nanoparticles are extensively used in magnetic separation, ferrofluids, and magnetic storage media. The deposition of gold nanoparticles onto cobalt core significantly affects their optical properties due to the introduction of surface Plasmon. Here the synthesis of gold nanoparticles decorated cobalt-silica nanoparticles are reported for the first time. Their optical and magnetic properties and capacity as a surface enhanced Raman

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19

Silva, Raphael Lucas de Sousa e. "Síntese do Fe3O4@SiO2:phen:Eu3+: um nanocompósito magnético luminescente visando aplicações biomédicas." Universidade Federal de Goiás, 2017. http://repositorio.bc.ufg.br/tede/handle/tede/7531.

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Submitted by Cássia Santos (cassia.bcufg@gmail.com) on 2017-07-10T11:42:20Z No. of bitstreams: 2 Dissertação - Raphael Lucas de Sousa e Silva - 2017.pdf: 3882688 bytes, checksum: 6b33233b331ed11ce579c9148910d0d4 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-07-10T11:46:08Z (GMT) No. of bitstreams: 2 Dissertação - Raphael Lucas de Sousa e Silva - 2017.pdf: 3882688 bytes, checksum: 6b33233b331ed11ce579c9148910d0d4 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427

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20

Simitev, Radostin D. "Convection and magnetic field generation in rotating spherical fluid shells." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97154249X.

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21

Wiedwald, Ulf. "Interface magnetism in Co/CoO core-shell nanoparticles and their transformation to pure metallic nanoparticles." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974954195.

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22

Júnior, Watson Beck. "Síntese e caracterização de nanomateriais superparamagnéticos do tipo core-shell para aplicação em catálise e biomedicina." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-08062016-143941/.

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As diversas aplicações tecnológicas de nanopartículas magnéticas (NPM) vêm intensificando o interesse por materiais com propriedades magnéticas diferenciadas, como magnetização de saturação (MS) intensificada e comportamento superparamagnético. Embora MNP metálicas de Fe, Co e bimetálicas de FeCo e FePt possuam altos valores de MS, sua baixa estabilidade química dificulta aplicações em escala nanométrica. Neste trabalho foram sintetizadas NPM de Fe, Co, FeCo e FePt com alta estabilidade química e rigoroso controle morfológico. NPM de óxido metálicos (Fe e Co) também foram obtidas. Dois métodos

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23

Endresen, Fredrik Vihovde. "Electric Motor Development for Shell Eco-Marathon : Manufacturing an ironless axial flux permanent magnet Motor with Hallbach array and Development of existing Motor for the Shell Eco-Marathon Competition." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19021.

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This thesis describes the process of making a new engine for the car DNV Fuel Fighter 2 that participated in the Shell Eco-Marathon Europe 2012 in Rotterdam. The decision was made to construct a new engine based on an optimized design by Lubna Nasrin. The engine is an ironless axial flux permanent magnet machine with Hallbach array. As a contingency plan there was the possibility to modify the engine used in 2010 and 2011 built by André Dahl-Jacobsen. The result of the process is that the new engine is operational and it has displayed an efficiency of 68 %. However the old engine has disp

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24

Leweke, Sarah [Verfasser]. "The inverse magneto-electroencephalography problem for the spherical multiple-shell model : theoretical investigations and numerical aspects / Sarah Leweke." Siegen : Universitätsbibliothek der Universität Siegen, 2019. http://d-nb.info/1177366347/34.

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25

Cruz, Carlos José Domingos da. "Síntese botton up de nanopartículas magnéticas core-shell do tipo γ-Fe2O3@CoFe2O4 visando aplicações em magneto-hipertermia". reponame:Repositório Institucional da UnB, 2013. http://repositorio.unb.br/handle/10482/15001.

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Dissertação (mestrado)—Universidade de Brasília, Faculdade UnB Planaltina, Programa de Pós-Graduação em Ciência de Materiais, 2013.<br>Submitted by Albânia Cézar de Melo (albania@bce.unb.br) on 2014-01-06T13:18:58Z No. of bitstreams: 1 2013_CarlosJoseDomingosCruz.pdf: 1828183 bytes, checksum: 8517a50b9431bf5e6f3c7782d577eab8 (MD5)<br>Approved for entry into archive by Patrícia Nunes da Silva(patricia@bce.unb.br) on 2014-01-22T20:31:36Z (GMT) No. of bitstreams: 1 2013_CarlosJoseDomingosCruz.pdf: 1828183 bytes, checksum: 8517a50b9431bf5e6f3c7782d577eab8 (MD5)<br>Made available in DSpace on 20

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Neris, Alex de Meireles. "Atividade fotocatalítica do TiO2 e do sistema core-shell CoFe2O4@TiO2 obtidos pelo método Pechini modificado." Universidade Federal da Paraíba, 2014. http://tede.biblioteca.ufpb.br:8080/handle/tede/7151.

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Made available in DSpace on 2015-05-14T13:21:40Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 3260499 bytes, checksum: 5bc01451ca6efdedd221c478c2647b55 (MD5) Previous issue date: 2014-08-01<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The need to control textile effluents due to contamination of rivers has led CONAMA to regulate and require a more efficient treatment process. Among the methods of treatment, heterogeneous catalysis stands out due to its high efficiency. The most used photocatalyst is TiO2. The combination of this material with other ones has be

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27

Júnior, Watson Beck. "Nanopartículas magnéticas metálicas recobertas com óxido de ferro: intensificação das propriedades magnéticas da nanopartícula e funcionalização para aplicação em biomedicina." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/75/75131/tde-02052011-144102/.

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A utilização de nanopartículas (NP) magnéticas em várias áreas da biomedicina e biotecnologia vem recebendo elevado destaque nos últimos anos, graças à versatilidade de aplicações tais como: reparo de tecidos, diagnósticos, imagens por ressonância magnética, tratamento contra o câncer, separação celular, transporte controlado de drogas, entre outras. Atualmente, as NP com potencialidade de aplicação em biomedicina baseiam-se principalmente em óxidos magnéticos de ferro, os quais apresentam comportamento superparamagnético a temperatura ambiente e baixa magnetização da ordem de 60 emu g-1. A ut

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28

López, Ortega Alberto. "Synthesis of bi-magnetic core|shell and onion- like nanoparticles based on iron and manganese oxides." Doctoral thesis, Universitat Autònoma de Barcelona, 2012. http://hdl.handle.net/10803/96255.

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Aquesta tesi engloba la síntesi i la caracterització estructural i magnètica de dos tipus de nanopartícules polymagnètiques: estructures nucli-escorça (core|shell, CS) i tipus ceba (onion-like). El primer sistema està format per un nucli-MnO|escorça-Mn 3O4 ( -Mn2O3) amb doble inversió, on el nucli i l'escorça mostren un comportament AFM i FiM, respectivament . Es de neix com estructuralment inversa ja que l'AFM es localitza al nucli i el FiM a l'escorça; a més, també es troba magnèticament invertida, és a dir, la temperatura de Néel de l'AFM presenta valors més elevats que la temperatur

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29

Makrygenni, Ourania. "Hybrids of Polyoxometalates supported on mesoporous silica and magnetic core-shell nanoparticles for anchored homogeneous catalysis." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066300/document.

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De nouveaux matériaux à base de silice (silice mésoporeuse SBA-15 et nanoparticules coeur-coquille) associés à des hybrides de polyoxométallates lacunaires ont été élaborés pour des applications relavant de la catalyse homogène supportée, lors de réactions d'oxydation douce. Le critère principal a été la formation de liaisons covalentes entre les POMs et les deux types de supports utilisés. Des POMs à structure de Keggin portant des fonctions acide carboxylique ont été greffés sur des SBA-15 fonctionnalisées par des amines. Ce même support a été ensuite utilisé pour d'autres stratégies d'immob

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30

Phuthu, Lutendo. "Analysis and simulations to obtain the weak magnetism term in ²²Na beta decay." Thesis, University of the Western Cape, 2016. http://hdl.handle.net/11394/5320.

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>Magister Scientiae - MSc<br>The study of ²²Na beta decay offers an opportunity to test the Standard Model of Particle Physics via measurements of the β−γ angular correlation. A previous measurement of this correlation yielded a non-zero value, indicating the need for a higher-order matrix element to the decay, beyond the allowed V − A approximation. On assuming the Conserved Vector Current (CVC) hypothesis for weak interactions and using the magnetic dipole M1 width of the analog 2+ state in ²²Na, one obtains an unexpectedly large 'second-class' form factor for 22Na β decay that is in disagr

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31

Martínez, Daniel. "Design of a Permanent-Magnet Synchronous Machine with Non-Overlapping Concentrated Windings for the Shell Eco Marathon Urban Prototype." Thesis, KTH, Elektrisk energiomvandling, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109741.

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This thesis deals with the design of a permanent-magnet synchronous inner rotor motor for an in-wheel application for the Shell Eco Marathon Urban concept vehicle. First of all, concepts related to permanent magnet motors are studied. Likewise, different features of permanent magnet motors are qualitatively evaluated in order to choose the most suitable. A radial flux motor is selected based on its solid, economic and acceptable characteristics. Next, a detailed study of concentrated windings is carried out. Through this investigation, undesirable configurations of pole and slot numbers due to

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De, Silva Vashista C. "Core-Shell Based Metamaterials: Fabrication Protocol and Optical Properties." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1062904/.

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The objective of this study is to examine core-shell type plasmonic metamaterials aimed at the development of materials with unique electromagnetic properties. The building blocks of metamaterials under study consist of gold as a metal component, and silica and precipitated calcium carbonate (PCC) as the dielectric media. The results of this study demonstrate important applications of the core-shells including scattering suppression, airborne obscurants made of fractal gold shells, photomodification of the fractal structure providing windows of transparency, and plasmonics core-shell with a ga

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Lopes, Junior José Carlos Campello. "Propriedades magneto-ópticas de colóides magnéticos á base de nanopartículas de magnetita recobertas com prata." Universidade Federal de Goiás, 2010. http://repositorio.bc.ufg.br/tede/handle/tde/2910.

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Groza, Georgiana Irina. "Magnétisme et propriétés de transport de couches d'agrégats coeur-coquille Co/CoO." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENY020/document.

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L'étude de cette thèse est focalisée sur la compréhension des caractéristiques du transport dans des systèmes granulaires cœur - coquille (cobalt - cobalt oxyde). Nous avons étudié le comportement magnétique et de transport de notre système granulaire ferromagnétique/antiferromagnétique. Les agrégats de cobalt de 4 nm sont fabriqués par une source à pulvérisation magnétron et condensation en phase vapeur. Lorsque les agrégats sont oxydés pendant le dépôt ils adoptent une géométrie en cœur – coquille avec un cœur icosaédrique et une coquille CoO de structure cfc. Après le dépôt, les agrégats so

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Nehme, Zeinab. "Nanoparticules magnétiques d’architecture complexe core-shell : couplage d'échange bias et interaction dipolaire." Thesis, Le Mans, 2016. http://www.theses.fr/2016LEMA1019.

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Le travail de thèse est consacré à l'étude numérique de nanoparticules (NPs) magnétiques core@shell Fe3O4@CoO présentant des propriétés d'échange bias (EB) en utilisant la méthode Monte Carlo (MC). En particulier, nous nous sommes concentrés sur l'étude de l'effet des réponses collectives (interactions inter-particules telles que les interactions dipolaires (ID)) sur les propriétés magnétiques de ces structures. Des résultats expérimentaux préliminaires, montrant l'existence d'une relation entre le décalage du cycle d'hystérésis et l'interaction entre NPs, ont motivé le travail numérique mené

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Junior, João Batista Souza. "Síntese de nanoestruturas core/shell de Co/Au magnetoplasmônica e pontos quânticos de CdSe/ZnS." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-28072017-170738/.

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Nanomateriais apresentam propriedades ajustáveis pelo seu tamanho e forma, como o fenômeno de superparamagnetismo em nanopartículas magnéticas ou o confinamento quântico dos portadores de carga em pontos quânticos (quantum dots). Assim, a síntese de nanopartículas esféricas monodispersas torna-se um fator extremamente importante, haja visto que tais propriedades podem ser ajustáveis para diferentes aplicações na área de tecnologia e biomedicina. Nanopartículas magnéticas e quantum dots podem s

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Sayed, Fatima. "Hollow Magnetic Nanoparticles : experimental and numerical studies." Thesis, Le Mans, 2016. http://www.theses.fr/2016LEMA1021/document.

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Cette thèse concerne l'étude des propriétés structurales et magnétiques de nanoparticules magnétiques creuses (HMNPs), coquille et coquille/coquille. Les effets de surface sont exaltés de par la présence des surfaces interne et externe. L'étude expérimentale de HMNPs basée sur des mesures magnétiques et de spectrométrie Mössbauer du 57Fe a montré une structure magnétique complexe. Les HMNPs ayant une épaisseur ultrafine présentent une structure magnétique décrite par 2 sous-réseaux spero-magnétiques opposés, en plus de la présence d’un champ d'échange bias significatif. L'effet de la taille et

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Chandra, Sayan. "Magnetization Dynamics and Related Phenomena in Nanostructures." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4877.

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Collective magnetic behavior in nanostructures is a phenomenon commonly observed in various magnetic systems. It arises due to competing inter/intra–particle interactions and size distribution and can manifest in phenomena like magnetic freezing, magnetic aging, and exchange bias (EB) effect. In order to probe these rather complex phenomena, conventional DC and AC magnetic measurements have been performed along with radio–frequency transverse susceptibility (TS) measurements. We also demonstrate the magnetic entropy change as a parameter sensitive to subtle changes in the magnetization dynamic

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Keskinen, J. (Juho). "Interpretation and relativistic simulation of selected electronic transitions:decays of M-shell hole states in atomic Cr, Br and Rb." Doctoral thesis, Oulun yliopisto, 2019. http://urn.fi/urn:isbn:9789526224862.

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Abstract In this thesis electronic structure of atomic chromium, rubidium and bromine are studied experimentally and theoretically through transitions and decay processes originating from selected M-shell hole states. The experiments are conducted with traditional methods of electron spectroscopy as well as more recent multicoincidence methods using pulsed synchrotron radiation and a magnetic bottle spectrometer. The observed electronic transitions are theoretically simulated with multiconfiguration Dirac-Fock method. Finally, the calculations are used to interpret the measured spectra to inve

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Niculaes, Dina. "Iron oxide nanocubes for magnetic hyperthermia." Doctoral thesis, Universitat Rovira i Virgili, 2017. http://hdl.handle.net/10803/441740.

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Durant la meva tesi s’han desenvolupat tres projectes principals, centrats en l'estudi de nanosistemes basats en l'ús de nanocubs d'òxid de ferro (IONCs) per a la hipertèrmia magnètica (HM). S’ha demostrat l'ús innovador de la configuració de HM per a l'oxidació suau de nanocubs tipus core-shell Fe1-xO/Fe3-δO4 a una única fase de Fe3O4. Atès que els valors de la taxa d'absorció específica (SAR) dels nanocubs tipus core-shell wüstita/magnetita han estat menors en comparació amb els IONCs de magnetita amb una longitud d’aresta de cub similar, el nucli de FeO s’ha oxidat mitjançant estimulació M

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Takahashi, Masahiro. "Synthesis of open-shell poly (1,2-phenylenevinylene)s and their magnetic and optical properties = Kaikakukei pori (1,2-fenirenbiniren) no gōsei to jiki, kōbutsusei /." Electronic version of summary, 1999. http://www.wul.waseda.ac.jp/gakui/gaiyo/2735.pdf.

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Thesis (doctoral)--Waseda University, 1999.<br>Page numbering error: p. 93 is numbered as p. 92. Accompanied by summary (7 p. ; 30 cm.) in Japanese. Includes bibliographical references. "List of publication": p. [92]-92 [i.e. 93].

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Reynisson, Reynir Fjalar. "Deep structure and sub-basalt exploration of the mid-Norwegian margin with emphasis on the Møre margin." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11136.

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This thesis addresses the use of potential field data in two main topics: sub-basalt exploration and structure of the deeper crust. Synthetic models and forward models of the Møre margin were constructed to test the sensitivity of the various potential field methods. The synthetic models demonstrate that forward modelling of the gravity and magnetic data is a valuable tool in basement recognition in sub-basaltic settings and the use of gravity gradients further limits the modelling ambiguity and improves the basement mapping. Deep sills, as observed in the Møre Basin, cannot be identified from

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Topasna, Gregory A. "The Scattering of H-alpha Emission Associated with the Rosette Nebula in the Monoceros Region Studied Using Polarimetry." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/27672.

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Polarimetric CCD images of HII regions were obtained using a rotating polarizer device designed, built, and used in conjunction with the Spectral Line Imaging Camera (SLIC) at Virginia Tech's Martin Observatory in Giles County, Virginia. The SLIC uses a narrow bandpass interference filter coupled with a 58 mm camera lens and cryogenically cooled CCD camera to image diffuse, extended H-alpha emission over a 10° angular extent. A rotating polarizer device was placed in front of the H-alpha filter with images recorded at every 45° with respect to a fiducial setting. Stoke's parameters and were ob

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Barik, Ankit [Verfasser], Johannes [Akademischer Betreuer] Wicht, Ulrich [Gutachter] Christensen, and Andreas [Gutachter] Tilgner. "Inertial modes, turbulence and magnetic effects in a differentially rotating spherical shell : Instabilities of spherical Couette flow / Ankit Barik ; Gutachter: Ulrich Christensen, Andreas Tilgner ; Betreuer: Johannes Wicht." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://d-nb.info/1143949145/34.

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Solný, Tomáš. "Příprava a aplikace fotokatalyticky aktivního oxidu titaničitého." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-256553.

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V práci je zkoumán vliv podmínek na průběh hydrolýzy alkoxidů titanu a vlastností připravovaných nanočástic oxidu titaničitého s důrazem na teplotu a množství vody přítomné v systému. Připravované hydrolyzáty alkoxidů titanu a nanočástice oxidu titaničitého připravené z hydrolyzátů jsou studovány metodami XRD, DTA – TGA, SEM – EDS, BET a PCCS. Nanočástice magnetitu byly syntetizovány pomocí precipitační reakce z roztoku Mohrovy soli a jejich krystalová struktura, velikost a povrchové vlastnosti byly sledovány s vyhodnocením vlivu teploty a při modifikaci povrchu polykarboxyletherovým superplas

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Milan, Nikolić. "Синтеза и карактеризација нанокомпозитних честица са структуром језгро-омотач". Phd thesis, Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, 2014. http://www.cris.uns.ac.rs/record.jsf?recordId=85383&source=NDLTD&language=en.

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У овој докторској дисертацији приказани су резултати синтеза и карактеризација нано-композитних честица са језгро-омотач структуром. Нанокомпозитне честице су синтетисане у течној фази, електростатичком депозицијом in situ синтетисаних SiO2, Fe3O4, ZnFe2O4 или NiFe2O4 наночестица на површину монодисперзних и сферичних силика језгро честица (средњег пречника ~ 0,4 μm). Силика језгро честице су синтетисане хидролизом и кондезацијом TEOS-a у базној средини. Силика наночестице су добијене неутрализацијом јако базног воденог раствора натријум силиката, док су феритне наночестице синтетисане копр

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Adam, Adeline. "étude du couplage élastique au sein d'hétérostructures cœur-coquille à base d'analogues du bleu de Prusse." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX076/document.

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Le contrôle optique des propriétés physiques d’un matériau suscite l’intérêt des scientifiques pour des enjeux aussi bien fondamentaux qu’appliqués. L’axe de recherche original que nous avons développé dans le cadre de ce travail de thèse visait à la réalisation et l’étude d’hétérostructures moléculaires photo-magnétiques dans des gammes de température susceptibles d’applications. L’approche proposée consistait à élaborer des hétérostructures de type multiferroïque constituées de deux phases, l’une piézomagnétique et l’autre photo-strictive. L’idée était d’optimiser le couplage, d’origine élas

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Cabreira, Gomes Rafael. "Dispersions de nanoparticules magnétiques de structure coeur/coquille : propriétés magnétiques et thermodiffusion." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066568/document.

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Nos objectifs sont ici de comprendre comment les propriétés magnétiques de nanoparticules (NPs) sont affectées par la diminution de leur taille et par leur composition chimique, et comprendre ce qui régit leur mouvement thermophorétique et l'effet magnéto-calorique. Des ferrofluides composés de NPs de structure cœur-couronne sont synthétisés ici avec un cœur de ferrite de Mn, de Co ou de ferrite mixte Zn-Mn, recouvert d'une couronne de maghémite. Les mesures magnétiques révèlent une composition magnétique mixte conduisant à l'observation d'un exchange bias qui se manifeste par des cycles d'hys

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Thiessen, Wladimir. "Polymere und Nanopartikel - Verfahren für die Chemische Nanotechnologie." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-65374.

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In der vorliegenden Arbeit soll das weit gefächerte Thema der chemischen Nanotechnologie um neue Resultate bereichert werden. Im Einzelnen handelt es sich um neue Synthesemethoden für magnetische Nanorods (Nanoteilchen mit länglicher Form) und Nanoshells (oxidische Nanokristalle mit einer Hülle aus Edelmetall), ein Verfahren zur Modifizierung diverser Oberflächen mit heterogenen Polymerbürsten durch kontrollierte binäre radikalische Polymerisation, neuartige Copolymere zur Stabilisierung und Funktionalisierung von Nanopartikeln und Herstellung von amphiphilen Nanopartikeln durch Oberflächenbeh

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Khalal, Mehdi Abdelbaki. "Photoionisation multiple des vapeurs métalliques Multi-electron coincidence spectroscopy: Triple Auger decay of Ar 2p and 2s holes 4d -inner-shell ionization of Xe+ ions and subsequent Auger decay." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS552.

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Ce travail de thèse porte sur l’étude expérimentale des processus de photoionisation multiple de vapeurs alcalines par rayonnement synchrotron. Je me suis intéressé particulièrement à la désexcitation par déclin Auger des atomes ionisés en couche interne. Le dispositif expérimental HERMES mis au point par l’équipe est un spectromètre par temps de vol de type bouteille magnétique qui permet de détecter en coïncidence tous les électrons émis lors du processus d’ionisation (photoélectrons) et de relaxation (électrons Auger). Une partie importante de ma thèse a été consacrée à l’améliorer pour per

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