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Dissertations / Theses on the topic 'Anionic Nanoparticles'

Author: Grafiati

Published: 7 September 2023

Last updated: 31 July 2025

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1

Alhilfi, Tamara. "Utilising anionic branched polymerisation techniques for the synthesis of novel nanoparticles." Thesis, University of Liverpool, 2014. http://livrepository.liverpool.ac.uk/16757/.

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Anionic polymerisation techniques have been optimised to develop a “one-pot”, facile method to produce both linear and branched polystyrenes utilising the “Strathclyde” route to highly branched structures. ATRP was investigated as a possible method but anionic polymerisation was found to give much better control over the size and structure of polystyrenes produced. Using this anionic polymerisation relatively monodisperse linear polystyrenes were synthesised with dispersity values as low as 1.03 for a polystyrene chain with a targeted degree of polymerisation (DPn) of 100 monomer units. A numb

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2

Garces, Cortes Camila. "Anionic Synthesis of Block Copolymers for Photonics Applications." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1271300539.

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Korichenska, O., and N. Kutsevol. "Silver Colloid Synthesis in Linear and Branched Anionic Polymer Matrices by Using Ascorbic Acid as Reductant." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35143.

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Silver colloids were synthesized in linear and branched anionic polymer matrices at different pH reducing by ascorbic acid. The template role of the host polymers in anionic form was studied at pH = 7 and pH = 12. Linear Polyacrylamide and star-like copolymers Dextran-graft-Polyacrylamide after alkaline hydrolysis were used as matrices. Silver colloids were studied by UV-Vis spectrophotometry just after synthesis and in 3 months. It is shown that branched polymer matrices are more efficient in comparison with linear one for in situ silver nanoparticle synthesis. The pH value affects the p

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4

BARRANCO, LINA MERCEDES DAZA. "SILICA NANOPARTICLES FUNCTIONALIZED WITH AMMONIUM GROUPS AND ANIONIC POLYMERS FOR STABILIZATION OF PICKERING EMULSIONS CONTAINING INSECT REPELLENT." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2018. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=36257@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Atualmente a crescente demanda do uso de repelentes de insetos tem promovido a pesquisa de produtos mais eficazes e com uma maior durabilidade da ação repelente. O objetivo deste trabalho foi a obtenção de novas nanopartículas com propriedades interfaciais modificadas superficialmente com grupos funcionais catiônicos e polímeros aniônicos, com o intuito de melhorar a estabilidade de emulsões Pickering contendo um princípio ativo, N,N -dimetil-m-toluamida (DEET), comumente util

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5

Marchand, Guillaume. "Synthèse et caractérisations de matériaux photosensibles à partir de lignines - Vers une utilisation en Traitement Photodynamique Antimicrobien appliqué à l'agronomie." Thesis, Limoges, 2018. http://www.theses.fr/2018LIMO0108/document.

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La surexploitation des ressources de la planète est aujourd’hui une problématique de premier ordre, et fait du remplacement des sources non renouvelables, d'énergie et de matières premières, l’un des défis majeurs du XXIe siècle. Dans cet objectif, les lignines, par leur disponibilité et leur biocompatibilité, apparaissent comme l’une des alternatives aux ressources fossiles. C’est dans ce contexte que le Laboratoire PEIRENE a décidé de mener ce travail de thèse portant sur le développement de nouveaux matériaux photosensibles à base de lignines modifiées. Dans ce but, trois lignines d’origine

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6

Goursaud, Matthieu. "Contribution to the development of nano-systems for the recognition of fluoride in water." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209378.

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The development of molecular receptors for anion recognition has become an important aspect of supramolecular chemistry. In this thesis, we focused our attention to the study of systems for fluoride recognition in water. Fluoride is indeed an anion of interest due to its implication in environmental and health related issues. Furthermore, its small size and high hydration energy make its recognition in water particularly challenging.<p>Most of the synthetic systems reported for fluoride recognition have been extensively studied in organic solvents (DMSO, acetonitrile) using tetrabutylammonium

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Serpell, Christopher J. "Imidazole-based ligands for anion recognition and catalytic metal nanoparticles." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533879.

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8

Filby, Maria ? "Anion binding host systems based on calix[4]arenes and nanoparticles." Thesis, Durham University, 2007. http://etheses.dur.ac.uk/2399/.

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A range of novel host molecules with various degrees of pre-organisation for the supramolecular complexation of anionic guest species have been synthesized. Both organic core and nanoparticle-based derivatives of the ligands have been prepared and the properties of the new host ligands studied with particular reference to their anion binding behaviour. Two types of calix[4]arene derived cationic hosts for anions with, respectively, 1,3-altemate and cone conformations have been prepared. The affinity of the tetrasubstituted calix[4]arene hosts for a variety of anions has been probed with Ή NMR

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9

Nahle, Sara. "Réponse macrophagique aux nanomatériaux carbonés : effets de leur caractéristiques physiques et chimiques sur le transcriptome Carbon-based nanomaterials induce inflammation and autophagy in rat alveolar macrophages Single wall and multiwall carbon nanotubes induce different toxicological responses in rat alveolar macrophages Gene expression profiling of alveolar macrophages exposed to non-functionalized, anionic or cationic multi-walled carbon nanotubes shows three different mechanisms of toxicity Cytotoxicity and global transcriptional responses induced by zinc oxide nanoparticles NM 110 in PMA-differentiated THP-1 cells Protein and lipid homeostasis altered in rat macrophages after exposure to metallic oxide nanoparticles." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0142.

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Les nanomatériaux carbonés (NMC) sont très utilisés dans le monde industriel et leurs applications, nombreuses, sont en plein développement. L’absence de réglementation pour leur préparation et leur emploi fait qu’il est nécessaire comme pour tous les nano-objets, de déterminer le risque qu’une exposition fait courir à l’Homme et d’adapter la législation en conséquence. Une meilleure connaissance de leur potentiel toxique est donc nécessaire. Les difficultés de plus en plus grandes pour utiliser les modèles animaux, rend nécessaire le développement d’études avec des lignées cellulaires au sein

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10

CALERO, RODRIGUEZ MARÍA PILAR. "Silica nanoparticles as inorganic scaffolds for the preparation of hybrid materials for the optical detection of anions." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/63459.

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[EN] The PhD Thesis entitled "Silica nanoparticles as inorganic scaffolds for the preparation of hybrid materials for the optical detection of anions" deals with the combination of supramolecular and material chemistry concepts to prepare hybrid sensing materials with the ability to detect selected ions through color and emission changes. The first hybrid material prepared is based in the use of silica nanoparticles as inorganic scaffold functionalized with spirobenzopyrans (signaling unit) and with thiourea moieties (binding unit). In the final nanoparticles the spirobenzopyran signaling uni

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11

Blug, Matthias. "Phosphinines as Precursors for Phosphabarrelenes and Phosphinine Anions: Coordination Chemistry, Catalysis and Stabilisation of Nanoparticles." Phd thesis, Ecole Polytechnique X, 2009. http://pastel.archives-ouvertes.fr/pastel-00005638.

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Les phosphinines, analogues phosphorés des pyridines sont à la base de ce travail de thèse. La première partie de ce travail résume les différentes voies de synthèse de ces phosphinines, leurs propriétés électroniques ainsi que leurs diverses applications en catalyse. Différents ligands bidentates, tridentates et tétradentates ont pu être générés via l'attaque nucléophile d'organolithiens sur des phosphinines possédant des groupements ancillaires diphénylphosphine. De plus l'utilisation d'un complexe pinceur mono-anionique dérivé du diphénylphosphinométhane a été envisagée notamment dans le ca

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Blug, Matthias. "Phosphinines as precursors for phosphinine anions and phosphabarrelenes : coordination chemistry, catalysis and stabilization of nanoparticles." Palaiseau, Ecole polytechnique, 2009. https://pastel.archives-ouvertes.fr/pastel-00005638.

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Phosphinines, the phosphorus analogues of pyridines, are the common basis of the present thesis work here. In the first part, the various synthetic routes for the synthesis of phosphinines their electronic properties and their application in transition metal catalysis are summarized. Bidentate, tridentate and tetradentate ligands could be generated by the nucleophilic attack of organolithium reagents on phosphinines with pending diphenylphosphine groups. The use of monoanionic pincer complex derived from diphenylphosphinomethane ( dppm) was studied with special emphasis on the activation of po

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13

Matulis, V. E., A. S. Mazheika, and O. A. Ivashkevich. "Theoretical Investigation of Interaction of 1-R-5-Mercaptotetrazoles with Silver and Palladium Particles." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35463.

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The molecular electrostatic potential (MESP) distribution for 1-R-5-mercaptotetrazolium anions, as well as total energy of complexes of 1-R-5-mercaptotetrazoliums ions with silver and palladium particles has been calculated using DFT approach. Based on the results of quantum-chemical calculations, coordination mode of the ligands under their binding with surfaces of nanoparticles was proposed. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35463

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Mercurio, James M. "Interlocked host structures for anion recognition and metal nanoparticles for catalysis and sensing applications." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:40178988-4945-4a98-af98-59a1a35a12d5.

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This thesis describes the synthesis and anion recognition properties of a variety of interlocked host receptors and the application of metal nanoparticles in the areas of catalysis and sensing. <b>Chapter One</b> introduces the field of anion supramolecular chemistry, with particular emphasis on areas relevant to the research discussed in later chapters. Following this, the synthesis and applications of metal nanoparticles are outlined. <b>Chapter Two</b> details the synthesis of a range of halo-triazolium based rotaxanes and explores the effects of altering both the halogen bond donor atom an

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15

Moses, Melanie Jean. "Synthesis and characterization of binary clusters to controllable binary nanoparticles "the new role of Zintl anions" /." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1963.

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Thesis (Ph. D.)--University of Maryland, College Park, 2004.<br>Thesis research directed by: Chemistry. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Daniel, Marie-Christine. "Reconnaissance électrochimique supramoléculaire d'anions d'intérêt biologique à l'aide de récepteurs dendritiques et à base de nanoparticules d'or." Bordeaux 1, 2003. http://www.theses.fr/2003BOR16020.

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Nous avons synthétisé trois types de dendrimères différents: des dendrimères à cœur colloi͏̈dal d'or (liaisons de coordination), des dendrimères "classiques" (liaisons covalentes) et des dendrimères supramoléculaires (liaisons hydrogène). Leur étude pour la reconnaissance d'oxoanions, principalement d'H2PO4- et de l'ATP2-, a montré quelques différences intéressantes. D'une part les nanoparticules d'or dendronisées peuvent être utilisées pour la préparation d'électrodes modifiées recyclables. D'autres part, les dendrimères possédant des fonctions ferrocényles perméthylées sont plus stables et p

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El, Mouakibi Abderrahim. "Elaboration de particules submicroniques de taille et forme contrôlées d'hydroxyde d'aluminium." Université Louis Pasteur (Strasbourg) (1971-2008), 2008. http://www.theses.fr/2008STR13202.

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18

Llinàs, Riera Maria del Carme. "New functionalization methodologies of mesoporous silica nanoparticles (MSNs) for biomedical applications." Doctoral thesis, Universitat Ramon Llull, 2016. http://hdl.handle.net/10803/369849.

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En la present tesi doctoral es descriu un procediment general per a l'obtenció de nanopartícules mesoporoses de sílice (MSNs) regioselectivament bifuncionalizades de forma ortogonal amb diferents grups funcionals. L'estratègia sintètica consisteix en la preparació de MSNs mitjançant co-condensació, seguit d'una posterior funcionalització covalent, mentre el tensioactiu es troba encara present en l'estructura de les MSNs. Seguint aquesta metodologia, s'han sintetitzat les nanopartícules bifuncionalizades amina-azida (MSN-(NH2)i(N3)o), amina-isotiocianat (MSN-(NH2)i(NCS)o) i amina-aldehid (MSN-(

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19

Yamamoto, Takayuki. "Control of The Phase Transition Behavior and Ionic Conductivity of Silver Iodide Nanoparticles by Size, Pressure and Anion Mixing." Kyoto University, 2017. http://hdl.handle.net/2433/225993.

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Mendoza, Muniz Carolina. "Asymmetric catalysis and molecular recognition using different platforms: homogeneous systems, functionalized polymers and magnetic nanoparticles." Doctoral thesis, Universitat Rovira i Virgili, 2011. http://hdl.handle.net/10803/37338.

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En este trabajo se han preparado tres nuevos complejos dinucleares de platino(II), [(dppp)Pt{-S(CH2)nNHC(=O)-NHR}]2(OTf)2 (n = 2, 3; R = Et, Ph), conteniendo ligandos tiolato-urea. Los complejos se han estudiado como receptores de aniones, mediante la determinación de las constantes de asociación por RMN de protón y mediante un ensayo de desplazamiento de indicador. También se han preparado nanopartículas magnéticas de cobalto y de magnetita y se han funcionalizado con macrociclos tipo éter corona, con -ciclodextrina y con organocatalizadores derivados de la L-hidroxiprolina. Las nanopartí

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Hilton, Robert Joseph. "Ferritin Diversity: Mechanistic Studies, Disease Implications, and Materials Chemistry." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/3070.

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The study of ferritin includes a rich history of discoveries and scientific progress. Initially, the composition of ferritin was determined. Soon, it was shown that ferritin is a spherical, hollow protein. Eventually, over several decades of research, the structure and some function of this interesting protein was elucidated. However, the ferritin field was not completely satisfied. Today, for example, researchers are interested in refining the details of ferritin function, in discovering the role of ferritin in a variety of diseases, and in using ferritin for materials chemistry applications.

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El, Sayed Shehata Nasr Sameh. "Supramolecular Chemistry: New chemodosimeters and hybrid materials for the chromo-fluorogenic detection of anions and neutral molecules." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/52598.

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[EN] Abstract The present PhD thesis entitled "Supramolecular Chemistry: New chemodosimeters and hybrid materials for the chromo-fluorogenic detection of anions and neutral molecules" is based on the application of supramolecular chemistry and material science principles for the development of optical chemosensors for anions and neutral molecules detection. The second chapter of this PhD thesis is devoted to the preparation of chemodosimeters for the chromo-fluorogenic detection of fluoride, diisopropyl fluorophosphates (DFP) and hydrogen sulfide. The optical detection of fluoride anion

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Lambert, Romain. "Nouveaux copolymères et nanostructures dérivés de liquides ioniques à base d'imidazoliums : applications en catalyse et comme additifs conducteurs ioniques." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0306/document.

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Des poly(liquides ioniques) (PILs) arrangés sous la forme de copolymères statistiques,de nanoparticules à chaine unique ou bien sous la forme de copolymères à blocs autoassemblés ont été employés comme précurseurs de carbènes N-hétérocycliques (NHC)s à des fins de catalyses organiques ou organométalliques. L’introduction d’anions acétate dans des unités PIL dérivés d’imidazolium permet la génération in situ de NHCs actifs en catalyse. Les nanoparticules composées d’une chaine unique polymère repliée sur elle-même (SCNP) ont été spécialement conçues selon deux stratégies impliquant, d’une part,

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Hecht, Mandy. "Particulate systems and thin-film based platforms." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17329.

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Die Verbindung von hoch entwickelten Nanomaterialien mit fluoreszenzbasierten Technologien hat sich zu einem aufstrebenden Forschungsbereich entwickelt. Nichtsdestotrotz ist bis heute der Schritt von einem organischen Indikatormolekül zum anwendbaren Sensorsystem ein komplexer Prozess. Diese Arbeit zielte darauf ab, sensorische Materialien verschiedener chemischer Natur für diverse Analyten zu entwickeln, zu charakterisieren und zu etablieren. Hierbei wurden zunächst pH sensitive Fluoreszenzfarbstoffe entwickelt und in dünnen Membranen immobilisiert. Der Teststreifen ermöglicht die Beurteilung

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Hu, Chih-Wei, and 胡致維. "SIZE-CONTROL OF AU NANOPARTICLES IN POLYSTYRENE VIA ANIONIC POLYMERIZATION." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/75551080893544063196.

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碩士<br>國立中正大學<br>化學工程所<br>93<br>The aim of this work is to prepare the polystyrene with thiol terminal group (PS-SH) and use this functionalized polystyrene to stabilize and control the size of gold nanoparticles. The PS-SH was first synthesized via an anionic polymerization. Then, PS-SH was mixed with HAuCl4·3H2O in THF solvent in the presence of a reducing agent, super hydride. Upon the reduction of Au+ to Au atoms, the thiol groups of the polymer molecules were bonded onto the gold surface and a polymeric nanocomposite with well-distribute nanogold particles material was thus formed. Dependi

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Chu, Yun-foung, and 朱永峰. "Anionic Synthesis of Block Copolymeric (PS-b-PI) Nanocomposite Containing Au Nanoparticles." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/02651460039173974393.

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碩士<br>國立中正大學<br>化學工程所<br>96<br>The aim of this work is to prepare vis anionic polymerization a PS-b-PI block copolymer containing chemically bonded gold nanoparticles. The block copolymer is first functionalized with thiol terminal group (PS-b-PI-SH) and then bonded onto the in-situ formed gold nanoparticles, resulting in (PS-b-PI)-AuNPs. We have discovered: first, the size of gold nanoparticles depends on the polymer molecular weight, structure, shape, and the thiol group to Au ratio control; second, in a fixed amount of polymer the size of the in-situ formed gold nanoparticles varies with th

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Beckmann, Ralph. ""Quat-Primer" Polymers as Dispersants for Nanoparticles." Doctoral thesis, 2012. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2012121410544.

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Nanoparticles promise many interesting applications because of their exceptional chemical and physical properties. Therefore nanoparticles offer a pathway for the fabrication of new functional, smart materials. Since the primary particle strongly tends to strong agglomeration, and since the surface of nanoparticles is often not compatible with polymers, it is not possible to disperse single particles homogeneously in a polymer melt. Formations of agglomerates are responsible for strong differences in concentration of the nanoparticles in the material matrix and therefore impede a homogeneous p

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Maity, Amit Ranjan. "Functionalised nanoparticle and quantum dot as cellular imaging probe." Thesis, 2019. http://hdl.handle.net/10821/8298.

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Preface One of the fundamental goals in biology is to understand the complex spatiotemporal interplay of biomolecules from the molecular to the integrative level. To study these interactions, researchers commonly use imaging tool both in in-vitro and invivo under different imaging modalities. Conventionally used fluorescent based molecular probes have several potential limitations, such as lower brightness, photo bleaching problem and broad absorption/emission spectra. In contrast nanoparticles based imaging probes have advantages as they have high molar extinction coefficients, high resistanc

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Tsai, Hsin Chih, and 蔡欣芝. "Preparation of Polystyrene Composite With Controllable Gold Nanoparticle Size via Anionic Polymerization." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/70073474097178271036.

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碩士<br>國立中正大學<br>化學工程研究所<br>101<br>This work mainly takes advantage of anionic polymerization to synthesize SCH3-polystyrene and SCH3-polystyrene-SH. Basically speaking，we use n-butyllithium to activate one side of dimethyl sulfide to form activated complex ion. Then we add styrene monomers to proceed polymerization. Finally, we use ethylene sulfide as end-functionalization agent to quench the polymer chain. Most importantly, we make use of the sulfur atom to form gold nanoparticle/ polystyrene nanocomposite with the addition and reduction of gold solution. We observe the effect on the size of

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Mahanta, Debajyoti. "Synthesis And Environmental Applications Of Polyaniline And Its Nanocomposites." Thesis, 2011. https://etd.iisc.ac.in/handle/2005/2410.

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The present thesis is focused on the synthesis and environmental applications of polyaniline and its nanocomposites. It is organized in six chapters and brief discussions of the contents of the individual chapters are given below. Chapter 1 reviews two important water purification methods: adsorption and photocatalysis, which are widely discussed in literature. A general introduction to conducting polymers has been given and their photocatalytic activity has been described. Chapter 2 reports the application of polyaniline emeraldine salt for the removal of anionic dyes from aqueous solutions b

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Mahanta, Debajyoti. "Synthesis And Environmental Applications Of Polyaniline And Its Nanocomposites." Thesis, 2011. http://etd.iisc.ernet.in/handle/2005/2410.

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The present thesis is focused on the synthesis and environmental applications of polyaniline and its nanocomposites. It is organized in six chapters and brief discussions of the contents of the individual chapters are given below. Chapter 1 reviews two important water purification methods: adsorption and photocatalysis, which are widely discussed in literature. A general introduction to conducting polymers has been given and their photocatalytic activity has been described. Chapter 2 reports the application of polyaniline emeraldine salt for the removal of anionic dyes from aqueous solutions b

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Chang, Ching-Yu, and 張景育. "Synthesis of gold-containing nanocomposite(gold nanoparticle/poly p-methylstyrene)by anionic polymerization." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/23644723234311323711.

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碩士<br>國立中正大學<br>化學工程研究所<br>92<br>The work is mainly to combine the anionic polymerization technique and gold nanoparticle for synthesizing gold nanoparticle/poly p-methylstyrene nanocomposite. The way is to prepare poly p-methylstyrene containing sulfide group and use this sulfide group for chemisorption of gold nanoparticl. The steps are: first, polymerization of p-methylstyrene. Second, chlorination by sodium hypochlorite and phase transfer catalyst of the polymer to produce CH2Cl group. Third, lithiation of dimethyl sulfide by n-butyllithium and capping with the chlorinated polymer.

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Ιατρίδη, Ζαχαρούλα. "Μελέτη αποδέσμευσης ιόντων δισθενούς χαλκού από συμπολυμερή τύπου κτένας". Thesis, 2009. http://nemertes.lis.upatras.gr/jspui/handle/10889/2479.

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Διερευνήθηκε η δέσμευση/αποδέσμευση ιόντων Cu(II) ή/και αντίθετα φορτισμένων επιφανειοδραστικών ενώσεων από συμπολυμερή τύπου κτένας. Ο κεντρικός σκελετός ήταν το πολυ(ακρυλικό νάτριο), PANa, ενώ οι πλευρικές αλυσίδες ήταν το Πολυ(Ν,Ν-διμεθυλακρυλαμίδιο) και το πολυ(Ν-Ισοπροπυλακρυλαμίδιο). Η συμπλοκοποίηση των συμπολυμερών με τα ιόντα Cu(II)σε υδατικό περιβάλλον διερευνήθηκε με θολομετρία, ιξωδομετρία, φασματοφωτομετρία UV-Vis, δυναμική σκέδαση φωτός, ιχνηθέτηση με φθορίζοντες ιχνηθέτες και προσδιορισμό του ζ-δυναμικού. Σε επόμενο στάδιο διερευνήθηκε η δυνατότητα σχηματισμού τριμερών συμπλόκω

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Al, Makdessi Georges. "Formation de poudres carbonées dans un plasma de haute fréquence produit à très basse pression dans des mélanges acétylène-argon." Thèse, 2017. http://hdl.handle.net/1866/19301.

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Dusty plasmas are plasmas that contain solid particles of nano- or micrometer size. They are widespread in the cosmic environment and act as precursors in the formation of planets and stars. Such plasmas are also used in laboratories for the synthesis of nanocomposites, which have wide technological and medical applications. While a large scientific effort has been invested in the study and control of such plasmas, the initial growth mechanism of powders (i.e. before they reach several tens of nanometers) remains poorly known. This work contributes primarily to expand the fundamental knowledg

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"Phosphorus Recovery from Microbial Biofuel Residual Using Microwave Peroxide Digestion and Anion Exchange." Master's thesis, 2012. http://hdl.handle.net/2286/R.I.15859.

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abstract: Biofuel from microbial biomass is a viable alternative to current energy production practices that could mitigate greenhouse gas levels and reduce dependency on fossil fuels. Sustainable production of microbial biomass requires efficient utilization of nutrients like phosphorus (P). P is a limited resource which is vital for global food security. This paper seeks to understand the fate of P through biofuel production and proposes a proof-of-concept process to recover P from microbial biomass. The photosynthetic cyanobacterium Synechocystis sp. PCC 6803 is found to contain 1.4% P by d

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"Sustainable Drinking Water Treatment: Using Weak Base Anion Exchange Sorbents Embedded With Metal Oxide Nanoparticles to Simultaneously Remove Multiple Oxoanions." Doctoral diss., 2016. http://hdl.handle.net/2286/R.I.37038.

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abstract: Ion exchange sorbents embedded with metal oxide nanoparticles can have high affinity and high capacity to simultaneously remove multiple oxygenated anion contaminants from drinking water. This research pursued answering the question, “Can synthesis methods of nano-composite sorbents be improved to increase sustainability and feasibility to remove hexavalent chromium and arsenic simultaneously from groundwater compared to existing sorbents?” Preliminary nano-composite sorbents outperformed existing sorbents in equilibrium tests, but struggled in packed bed applications and at low infl

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Piotrowski, Piotr. "Surface-enhanced Raman scattering (SERS) - based detection of ions." Doctoral thesis, 2017.

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The aim of this thesis is to obtain new optical sensors for ions, especially sensors using metallic nanostructures. Metal cations and inorganic anions were selected as the analytes, since they are widespread chemical species. They play various roles in our surroundings: as fundamental electrolytes in bodies of living organisms (e.g. sodium or potassium cations, chloride anions), food additives (nitrates, carbonates) and even pollutants (heavy metal cations, sulphates, phosphates). Detection of ions is essential in, just to name a few: quality control of food products, testing environmental sam

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