Relevant bibliographies by topics / Porous materials. Fullerenes. Nanoparticles

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Porous materials. Fullerenes. Nanoparticles'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Porous materials. Fullerenes. Nanoparticles"

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Hidalgo, Francisco, and Cecilia Noguez. "Optically active nanoparticles: Fullerenes, carbon nanotubes, and metal nanoparticles." physica status solidi (b) 247, no. 8 (June 10, 2010): 1889–97. http://dx.doi.org/10.1002/pssb.200983923.

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Shpilevsky, E., O. Penyazkov, S. Filatov, G. Shilagardi, P. Tuvshintur, D. Timur-Bаtor, and D. Ulam-Orgikh. "Modification of Materials by Carbon Nanoparticles." Solid State Phenomena 271 (January 2018): 70–75. http://dx.doi.org/10.4028/www.scientific.net/ssp.271.70.

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The physical and chemical principles of the preparation of carbon nanoparticles (fullerenes, carbon nanotubes) and their complexes, and the methods for introducing nanoparticles into metal, ceramic and polymer matrices are considered. The most important properties of some materials containing these cluster molecules are given. It is shown that the introduction of carbon nanoparticles into materials, even in small fractions (up to 1.0 wt. %), significantly in some cases, at times alters their structure, electrical and tribological properties.
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Pikulev, V. B., S. N. Kuznetsov, A. A. Saren, Yu E. Gardin, and V. A. Gurtov. "Singlet oxygen generation in porous silicon with fullerenes." physica status solidi (a) 204, no. 5 (May 2007): 1266–70. http://dx.doi.org/10.1002/pssa.200674305.

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Sun, Ya-PING, and Jason E. Riggs. "Organic and inorganic optical limiting materials. From fullerenes to nanoparticles." International Reviews in Physical Chemistry 18, no. 1 (January 1999): 43–90. http://dx.doi.org/10.1080/014423599230008.

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Ugarte, D. "Graphitic Nanoparticles." MRS Bulletin 19, no. 11 (November 1994): 39–42. http://dx.doi.org/10.1557/s0883769400048399.

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Pure carbon materials, graphite and diamond, possess a wide array of interesting physical properties, and so attract a large spectra of interests and applications. Carbon microparticles (carbon black) and carbon fibers are widely used in practical applications including common materials (paints, inks, polymers, etc.) and high-performance composite materials.Carbon displays a remarkably rich and complex chemical behavior (three different possible hybridizations: sp1, sp2, and sp3). In particular, the covalent carboncarbon bond is one of the strongest in nature, and induces a high melting temperature (> 4000°C). The phase changes associated with unusually high temperatures and pressures as revealed in the carbon phase diagram, and the fact that the solid sublimates at low pressures before melting, lead to many experimental difficulties in the study of high-temperature properties of carbon materials. Experiments must therefore rely on transient melting, for example, laser vaporization or arc-discharge heating. This explains why fullerenes and related graphitic structures have only recently been discovered.From a fundamental point of view, the discovery of fullerenes has introduced new ideas about how carbon atoms bond. The curvature and closure of graphitic surfaces has become a standard concept in carbon chemistry, and recently a wide range of structures formed by curved graphitic networks has been observed. A surprising aspect of fullerene research is that these novel graphitic structures were found in well-known experiments, and that they had been overlooked for so many years.This article will describe recent progress in the generation and physical characterization of graphitic nanoparticles, or multishell fullerenes. The lack of an efficient method for producing, as well as a method for purifying these particles makes it difficult to characterize them and to develop possible applications.
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Lim, I.-Im S., Yi Pan, Derrick Mott, Jianying Ouyang, Peter N. Njoki, Jin Luo, Shuiqin Zhou, and Chuan-Jian Zhong. "Assembly of Gold Nanoparticles Mediated by Multifunctional Fullerenes." Langmuir 23, no. 21 (October 2007): 10715–24. http://dx.doi.org/10.1021/la701868b.

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Ma, Yihan, Xiaoyan Zhang, Yinjia Cheng, Xiaosui Chen, Yong Li, and Aiqing Zhang. "Mussel-inspired preparation of C60 nanoparticles as photo-driven DNA cleavage reagents." New Journal of Chemistry 42, no. 22 (2018): 18102–8. http://dx.doi.org/10.1039/c8nj03970d.

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Kirumakki, Sharath, Jin Huang, Ayyappan Subbiah, Jiyong Yao, Adam Rowland, Brentley Smith, Atashi Mukherjee, Sandani Samarajeewa, and Abraham Clearfield. "Tin(iv) phosphonates: porous nanoparticles and pillared materials." Journal of Materials Chemistry 19, no. 17 (2009): 2593. http://dx.doi.org/10.1039/b818618a.

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Fiorito, S., A. Serafino, F. Andreola, A. Togna, and G. Togna. "Toxicity and Biocompatibility of Carbon Nanoparticles." Journal of Nanoscience and Nanotechnology 6, no. 3 (March 1, 2006): 591–99. http://dx.doi.org/10.1166/jnn.2006.125.

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A review is presented of the literature data concerning the effects induced by carbon nanoparticles on the biological environment and the importance of these effects in human and animal health. The discovery in 1985 of fullerenes, a novel carbon allotrope with a polygonal structure made up solely by 60 carbon atoms, and in 1991 of carbon nanotubes, thin carbon filaments (1–3 μm in length and 1–3 nm in diameter) with extraordinary mechanical properties, opened a wide field of activity in carbon research. During the last few years, practical applications of fullerenes as biological as well as pharmacological agents have been investigated. Various fullerene-based compounds were tested for biological activity, including antiviral, antioxidant, and chemiotactic activities. Nanotubes consist of carbon atoms arranged spirally to form concentric cylinders, that are perfect crystals and thinner than graphite whiskers. They are stronger than steel but very flexible and lightweight and transfer heat better than any other known material. These characteristics make them suitable for various potential applications such as super strong cables and tips for scanning probe microscopes, as well as biomedical devices for drug delivery, medical diagnostic, and therapeutic applications. The effects induced by these nanostructures on rat lung tissues, as well as on human skin and human macrophage and keratinocyte cells are presented.
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Fink, D., R. Klett, C. Mathis, J. Vacik, V. Hnatowicz, and L. T. Chadderton. "Precipitation of dissolved alkali salts and fullerenes on surfaces of doped porous matter." Applied Physics A Materials Science & Processing 62, no. 3 (March 1996): 191–95. http://dx.doi.org/10.1007/bf01575080.

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Dissertations / Theses on the topic "Porous materials. Fullerenes. Nanoparticles"

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Wang, Yonggang. "Transport and retention of fullerene-based nanoparticles in water-saturated porous media." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29782.

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Thesis (Ph.D)--Civil and Environmental Engineering, Georgia Institute of Technology, 2010.
Committee Chair: Pennell, Kurt; Committee Member: Hughes, Joseph; Committee Member: Kim, Jaehong; Committee Member: Snyder, Robert; Committee Member: Yiacoumi, Sotira. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Wittee, Lopes Christian. "Characterization of metallic species on porous materials by in situ XAS." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/107953.

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El objetivo de esta tesis es estudiar la agrupación y el crecimiento de especies metálicas confinadas o soportadas en materiales porosos mediante espectroscopia de absorción de rayos X in situ. Para lograrlo, las especies de paladio y plata se han introducido en materiales porosos (¿-alúmina, carbón activo y zeolitas) mediante impregnación vía húmeda y métodos de intercambio iónico, respectivamente. Luego, el agrupamiento de estas especies metálicas se ha controlado mediante tratamientos de activación en diferentes atmósferas (inerte, oxidativa y reductiva) y seguido por XAS de manera detallada. El objetivo principal del trabajo actual es demostrar que tanto XANES como EXAFS pueden proporcionar información valiosa y, en cierto punto, innovadora durante el control de especies metálicas (en términos de tipo y tamaño de las especies). Aprovechando los procedimientos de análisis inusuales, como el análisis de los cumulantes, el ajuste de la parte imaginaria de la transformada de Fourier y otros, es posible obtener información refinada sobre los sistemas investigados. En la sección de introducción, se proporciona una compilación de estudios en los que se ha utilizado XAS como técnica importante para caracterizar especies metálicas en materiales porosos. Conscientes de que las personas pueden usar dicha introducción como base para estudios más complejos en el futuro, la discusión se ha dirigido tentativamente hacia este objetivo. El capítulo 4 se centra en el estudio de la influencia de los precursores de paladio y la naturaleza del soporte en las nanopartículas resultantes. El proceso de activación completo, es decir, la transformación precursor --> nanopartícula, ha sido seguido por XAS in situ. El análisis estuvo compuesto por el punto de partida (material impregnado), calcinación en flujo de O2 y reducción posterior con H2. La consecuencia del uso de diferentes precursores metálicos y soportes se ha discutido en términos del número de coordinación promedio obtenido a partir del análisis de datos de EXAFS, que fue respaldado por técnicas de caracterización de laboratorio. El capítulo 5 está dedicado al estudio de la agrupación de plata durante y después de los tratamientos de activación utilizando zeolitas de poro pequeño intercambiadas con plata como precursores y nanocontenedores. Se ha estudiado la influencia de la estructura y la composición química de los materiales basados en plata sobre las especies metálicas formadas en diferentes condiciones de agrupamiento y redispersión del metal (calcinación usando atmósferas distintas, reducción en H2, redispersión en O2) utilizando métodos de caracterización in situ o ex situ. Después, se discuten las consecuencias catalíticas de las zeolitas que contienen Ag en la reacción de SCO-NH3. En esta sección, la combinación de XAS in situ con varias técnicas de laboratorio ha demostrado ser fundamental para un completo entendimiento del trabajo. Finalmente, una lista de proyectos desarrollados en paralelo a esta tesis se proporciona al final de este documento.
The aim of this thesis is to study the clustering and growth of metallic species either confined or supported in porous materials by in situ X-ray absorption spectroscopy. To accomplish this task, palladium and silver species were introduced into porous materials (¿-alumina, activated carbon and zeolites) by wetness impregnation and ion-exchange methods, respectively. Then, the clustering of these metallic species was controlled by activation treatments in different atmospheres (inert, oxidative and reductive) and followed by XAS in a comprehensive way. The principal goal of current work is to demonstrate that both XANES and EXAFS can provide valuable and, at certain point, innovative information during tuning of metallic species (in terms of type and size). Taking advantage of unusual analysis procedures, such as cumulant approach, fitting of imaginary part of Fourier transform and others, it is possible to obtain refined information about the investigated systems. In the introduction section, a compilation of studies in which XAS was used as important technique to characterize metallic species in porous materials is provided. Conscious that people can use such introduction as a basis for more complex studies in the future, the discussion has been tentatively directed toward this goal. The chapter 4 is focused on the study of the influence of palladium precursors and the nature of support on the resultant nanoparticles. The whole activation process, i.e. the transformation precursor --> nanoparticle, was followed in situ by XAS. The analysis pathway was composed by the starting point (as-impregnated), calcination in O2 flow and posterior reduction with H2. The consequence of using distinct metal precursors and supports were discussed in terms of average coordination number obtained from EXAFS data analysis, which was co-supported by laboratory characterization techniques. The chapter 5 is dedicated to the study of silver clustering during and after activation treatments using Ag-containing small-pore zeolites as precursors and nanocontainers. The influence of framework structure and chemical composition of Ag-based materials on formed Ag species at different clustering and metal redispersion conditions (calcination using distinct atmospheres, reduction in H2, redispersion in O2) were studied using either in situ or ex situ characterization methods. After, the catalytic consequences of tuned Ag-containing zeolites in SCO-NH3 are discussed. In this section, the combination of in situ XAS with several laboratory techniques proved to be pivotal to have a full picture of the investigated system. Finally, a list of projects developed in parallel to this thesis is provided at the end of this document.
L'objectiu d'aquesta tesi és estudiar l'agrupació i el creixement d'espècies metàl·liques confinades o suportades en materials porosos mitjançant espectroscòpia d'absorció de raigs X in situ. Per a això, les espècies de pal·ladi i plata s'han introduït en materials porosos (¿-alúmina, carbó activat i zeolites) per mitjà de la impregnació via humida i mètodes d'intercanvi iònic, respectivament. Una vegada preparats els materials, l'agrupament de les espècies metàl·liques s'ha controlat fent ús de tractaments d'activació en diferents atmosferes (inert, oxidant i reductora) s'ha estudiat exhaustivament per XAS. L'objectiu principal del treball és demostrar que tant el XANES com l'EXAFS proporcionen informació rellevant i, en certa manera, innovadora per al control d'espècies metàl·liques (en termes de tipus i grandària d'aquestes espècies). Fent ús de procediments de tractament de dades no molt habituals com l'anàlisi de cumulants, l'ajust de la part imaginària de la transformada de Fourier i altres, és possible obtenir informació detallada sobre els sistemes estudiats. En l'apartat de la introducció, es proporciona una recopilació d'estudis en els quals s'ha utilitzat XAS com a tècnica principal per a caracteritzar les anomenades espècies metàl·liques en materials porosos. Aquesta introducció ha estat redactada per a que puga servir com a punt de partida per a futurs estudis que requereixen la utilització de XAS per a la caracterització de les espècies metàl·liques presents en els catalitzadors. El capítol 4 es centra en l'estudi de la influència dels precursors de pal·ladi i la naturalesa del suport front a les nanopartícules resultants. El procés d'activació, és a dir, la transformació precursor --> nanopartícula, ha sigut estudiat per XAS in situ. L'anàlisi per XAS va comprendre els següents passos: punt de partida (material impregnat), calcinació en flux d'O2 i reducció posterior amb H2. La utilització de diferents precursors i suports metàl·lics ha permès dur a terme una discussió, referent al nombre de coordinació mitjà obtingut a partir de l'anàlisi de dades de la zona EXAFS, que ha estat recolzat per altres tècniques de caracterització. El capítol 5 s'ha dedicat a l'estudi de l'agrupació de plata intercanviada en els catalitzadors durant i després dels tractaments d'activació. S'han utilitzat zeolites de porus xicotet, com la CHA i RHO, intercanviades amb plata. L'estudi de la influència de l'estructura zeolítica i la composició química dels materials enfront dels diferents tractaments d'activació (calcinació utilitzant diferents atmosferes, reducció en presència d'H2, re-dispersió en atmosfera d'O2) es va realitzar fent ús de mètodes de caracterització in situ o ex situ. A continuació, es discuteix la influència d'aquestes espècies metàl·liques formades, utilitzant els diferents mètodes d'activació, per a la reacció d'SCO-NH3. En aquest sentit, s'ha demostrat que la combinació de XAS in situ amb diverses tècniques habituals de laboratori és fonamental per al desenvolupament d'aquest treball. Finalment, es presenta una llista de projectes, en els quals també s'ha treballat paral·lelament, on s'ha utilitzat XAS com a tècnica de caracterització.
Wittee Lopes, C. (2018). Characterization of metallic species on porous materials by in situ XAS [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/107953
TESIS
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Karumuri, Anil Kumar. "Hierarchical Porous Structures Functionalized with Silver Nanoparticles: Adaptation for Antibacterial Applications." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1401792088.

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Vijwani, Hema. "HIGHLY ACTIVE POROUS CATALYSTS FABRICATED BY ATTACHMENT OF PALLADIUM NANOPARTICLES ON HIERARCHICAL CARBON STRUCTURES." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1310438347.

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Young, Allison Patricia. "Using Lattice Engineering and Porous Materials Gating to Control Activity and Stability in Heterogeneous Catalysis." Thesis, Boston College, 2018. http://hdl.handle.net/2345/bc-ir:108207.

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Thesis advisor: Chia-Kuang Tsung
Heterogeneous catalysis is a critical field for chemical industry processes, energy applications, and transportation, to name a few. In all avenues, control over the activity and selectivity towards specific products are of extreme importance. Generally, two separate methods can be utilized for controlling the active surface areas; a below and above the surface approach. In this dissertation, both approaches will be addressed, first starting with controlling the active sites from a below approach and moving towards control through sieving and gating effects above the surface. For the first part half, the control of the product selectivity is controlled by finely tuning the atomic structures of nanoparticle catalysts, mainly Au-Pd, Pd-Ni-Pt, and Pd Ni3Pt octahedral and cubic nanoparticle catalysts. Through these shaped core-shell, occasionally referred to as core@shell, particles the shape is maintained in order to expose and study certain crystal facets in order to obtain a more open or closed series of active sites. With the core shell particles, the interior core particle (Au and Pd) is used for the overall shape but also to expansively/compressively strain the outer shell layer. By straining the surface, the surface electronic structure is altered, by raising or lowering the d-band structure, allowing for reactants to adsorb more or less strongly as well as adsorb on different surface sites. For the below the surface projects, the synthesized nanoparticle catalyst are used for electrochemical oxidation reactions, such as ethanol and methanol oxidation, in order to study the effect of the core and shell layers on initial activity, metal migration during cycling, as well as particle stability and activity using different crystal structures. In particular, the use of core shell, alloyed, and intermetallic (ordered alloys) particles are studied in more detail. In the second half of this dissertation, control of the selectivity will be explored from the top down approach; in particular the use of metal organic framework (MOF) will be utilized. MOF, with its inherent size selective properties due to caging effects from the chosen linkers and nodes, is used to coat the surface of catalysts for gas, liquid, and electrochemical catalysis. By using nanoparticle catalyst, the use of MOF, more explicitly the robust zirconium based UiO-66, as a crystalline capping agent is first explored. By incorporating both the nanoparticle and UiO-66 amino functionalized precursors in the synthesis, the nanoparticles are formed first and followed by coating in UiO-66-NH2, where the amino group acts as an anchor, completely coating the particles. The full coating is tested through size selective alkene hydrogenations with the NP surface further tested by liquid phase selective aldehyde hydrogenations; the UiO-66-NH2 pores help to guide the reactant molecule in a particular orientation for the carbonyl to interact rather than the unsaturated C=C bond. This approach is taken for more complex hybrid structures for electrochemical proton exchange membrane fuel cell (PEMFC) conditions. Through the gating effects, the UiO-66 blocks the Pt surface active sites from poisonous sulfonate groups off of the ionomer membrane while simultaneously preventing aggregation and leaching of Pt atoms during electrochemical working conditions
Thesis (PhD) — Boston College, 2018
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Chemistry
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Kim, Sanghoon. "Designing Stimuli-Responsive Porous Silica Materials using Solid Lipid Nanoparticles (SLN) and Magneto-responsive Surfactants for Delivery of Curcumin." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0132/document.

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Ce travail a consisté à préparer des matériaux silicatés poreux à caractère stimuli-sensible à base de nanoparticules lipidiques solides (SLN) et de tensioactifs magnétiques. Plusieurs systèmes à base de tensioactifs ont été utilisés afin de synthétiser des matériaux silicatés à porosité contrôlée en utilisant des méthodes décrites dans la littérature ou mises au point au laboratoire. De différents caractères stimuli-sensible ont été introduits dans les matériaux silicatés poreux en fonction de système utilisé: les nanoparticules lipidiques solides (SLN) pour les matériaux sensible au pH et les tensioactifs magnétiques pour les matériaux sensible au champ magnétique. Premièrement, les matériaux à base de nanoparticules lipidiques solides (SLN) ont été utilisés pour la vectorisation d’un principe actif, la curcumine. La libération de la curcumine a été contrôlée en fonction de pH. Un revêtement sur la surface silice a été également employé pour mieux contrôler la libération de la curcumine. D’autre part, la sensibilité au champ magnétique a été introduite dans des silices mésoporeuses en utilisant des tensioactifs magnétiques. Leurs propriétés d’auto-assemblage (i.e. micelles, vésicules) ont été mise en évidence. Ainsi, la synthèse de matériaux silicatés poreux à caractère magnétique-sensible a été effectuées en utilisant ces tensioactifs. Enfin, les SLN magnétiques ont été préparés en combinant les SLN avec un tensioactif magnétique, qui ont été servi pour la synthèse de catalyseur à base de la silice méso-macroporeuse dopée en nanoparticules d’oxyde de fer
This work is to prepare stimuli-responsive porous silica materials based on solid lipid nanoparticles (SLN) and magnetic surfactants. To develop this study, several surfactants systems were used to synthesize silica materials with controlled porosity via protocols described in the literature or developed in the laboratory. Different stimuli-responsive characters were introduced in porous silica materials as a function of system used: solid lipid nanoparticles (SLN) for pH-sensitive and magnetic-sensitive surfactants for magnetic silica materials. First, the materials synthesized with solid lipid nanoparticles (SLN) were used for the delivery of an anti-carcinogenic drug, curcumin. A coating method on silica surface was also used to better control the release of curcumin. Secondly, the responsiveness to the magnetic field was introduced in silica materials using the magnetic surfactants. Their self-assembly properties (i.e. micelles, vesicles) were studied and their applications in the synthesis of magnetic porous silica materials were investigated. Finally, the magnetic solid lipid nanoparticles have been prepared by combining SLN with magnetic surfactants, which have been used for the synthesis of meso-macroporous silica catalyst encapsulating iron oxide nanoparticles
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Marszewski, Michal. "Development of highly porous crystalline titania photocatalysts." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1476281107453411.

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May, Masnou Anna. "Insights into nanomaterials: from surfactant systems to meso/macroporous materials and nanoparticles." Doctoral thesis, Universitat de Barcelona, 2014. http://hdl.handle.net/10803/285940.

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Nanomaterials have structured components with at least one dimension of less than 100 nm. Their novel properties stem from their nanoscale dimensions and increased relative surface area, and they have a wide range of applications in several key fields, including medicine. In this thesis we focus on meso- and meso/macroporous silica materials and nanoparticle. We examine how the properties of nanomaterials are influenced by the experimental conditions used in their synthesis. We then explore the possibility of tailoring such properties by varying the parameters in the process of manufacture. To this end we prepared a range of materials, including mesoporous silica, meso/macroporous silica, silica porous spheres and silica nanoparticles and studied their properties. We also examined the micellar solutions and emulsions that are used in the synthesis of these materials, their micellar and droplet size, the phase behavior of the surfactant systems involved in the synthesis, the stability and rheological behavior of the emulsions and the scale up parameters for their preparation at different scales. The synthesis and characterization techniques include rheology, optical microscopy, nitrogen adsorption-desorption, X-ray scattering (SAXS and XRD), transmission and scattering electron microscopy (TEM and SEM), dynamic light scattering (DLS), zeta potential and thromboelastography, among others. In the first study we examined water-in-oil emulsions with a liquid crystal phase as continuous phase. These systems are stable and highly elastic. Their microstructure is discussed by fitting the data with several rheological models. These systems are also compared with water-in-oil emulsions with a micellar phase in the continuous phase, and as a function of surfactant concentration and volume fraction of dispersed phase. In the second study, the process variables that have a significant effect on the properties of the emulsions are identified, including stirring rate, dispersed phase addition flow rate, surfactant concentration and scale up. Droplet size and rheological properties are considered as response variables. Stirring rate is the parameter that most influences the emulsion properties, followed by surfactant concentration. Vessel size is also important. To study the scale up, emulsions were prepared at three scales with geometric similarity and we identified the parameters that must be kept constant to obtain the same emulsion in the three scales, i.e. emulsions with the same droplet size, viscosity, yield stress, viscoelastic parameters and stability. The scale invariants take into account the stirring rate (N) and the scale (D, impeller diameter). The third study focuses on the preparation of meso and meso/macroporous materials. Bimodal mesoporous materials with an ordered hexagonal structure and two interconnected networks are prepared from a mixture of two surfactants, one hydrogenated and the other fluorinated, through the cooperative templating mechanism, using tetramethyl orthosilicate as silica source. The synthesis of ordered mesoporous materials from a novel surfactant consisting of a modified block copolymer with amino-groups on the ends (Jeffamine) is also studied. In this case, the best ordering of the mesopores is obtained at low temperature. In both studies, the surfactant phase behavior, and the structural properties of both surfactants and materials are determined, and the experimental conditions (pH, temperature, agitation) are optimized. Macroporous materials are then prepared from the oil-in-water emulsions stabilized with modified Jeffamine and using decane as organic phase, through the emulsion templating mechanism. Finally, mesoporous silica spheres are prepared from highly concentrated water-in-oil emulsions. The last study focuses on the synthesis and applications of silica nanoparticles. The process variables that have a direct effect on the size are identified, like the silica source concentration and the pH. The growth mechanism of these particles is studied through turbidimetry and explained in terms of nuclei formation and aggregation of the hydrolyzed species. The clotting properties of the particles are analyzed, in order to use these particles as a scaffold for further functionalization and application in the control of internal hemorrhages. First, the particles are functionalized to reduce the clotting activity, in order to avoid the formation of unwanted clots. Amino-functionalization and PEGylation are analyzed in this case. Second, functionalization with polyphosphate chains is studied in order to enhance the clotting activity, not only in normal conditions, but also under coagulopathy and hypothermia.
Els nanomaterials són materials amb propietats morfològiques entre 1 i 100 nm en almenys una direcció. En aquesta tesi s'estudien els materials meso- i meso/macroporosos de sílice, que tenen porus en aquestes dimensions, i nanopartícules, la grandària de les quals es troba també en aquest rang. En una primera fase s'estudien els sistemes tensioactius, com les solucions micel·lars i les emulsions, que s'usen per a la síntesi d’aquests materials. El primer estudi consta de l’anàlisi de les emulsions formades amb cristall líquid a la fase contínua. La microestructura d'aquests sistemes s'estudia amb diversos models reològics. També es comparen amb sistemes amb fase micel·lar en la fase contínua i a diferents concentracions de tensioactiu i fase dispersa. En un segon estudi es determinen les variables de procés que tenen un efecte significatiu sobre les propietats de les emulsions. Com a variables de resposta s'usen la mida de gota i les propietats reològiques. També s'estudia l'escalat en la preparació de les emulsions altament concentrades i es determinen els invariants d’escala. El tercer estudi se centra en la preparació de materials meso i meso/macroporosos. Es sintetitza un material amb mesoporus bimodals i estructura hexagonal ordenada a partir d'una barreja de dos tensioactius, i la síntesi de materials mesoporosos ordenats a partir d'uns tensioactius amb grups amino. També es preparen materials amb macroporus a partir d'emulsions formades amb aquest tensioactiu i, en última instància, es preparen esferes mesoporoses de sílice a partir d'emulsions aigua-en-oli altament concentrades. L'últim estudi se centra en la síntesi de nanopartícules de sílice, en les variables de procés que tenen un efecte directe sobre la mida obtinguda, i en l'aplicació d'aquestes nanopartícules en la coagulació de la sang per controlar hemorràgies internes. S'estudien les propietats de coagulació i es funcionalitzen amb agents que acceleren o disminueixen aquesta activitat. Les tècniques de síntesi i caracterització inclouen reologia, microscòpia òptica, adsorció-desorció de nitrogen, dispersió de raigs X, microscòpia electrònica de transmissió i de rastreig (TEM i SEM) i potencial zeta, entre altres.
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DePuccio, Daniel P. "Investigating The Influence Of Gold Nanoparticles On The Photocatalytic And Catalytic Reactivity Of Porous Tungsten Oxide Microparticles." ScholarWorks @ UVM, 2016. http://scholarworks.uvm.edu/graddis/641.

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Tungsten oxide (WO3) is a semiconducting transition metal oxide with interesting electronic, structural, and chemical properties that have been exploited in applications including catalysis, gas sensing, electrochromic displays, and solar energy conversion. Nanocrystalline WO3 can absorb visible light to catalyze heterogeneous photooxidation reactions. Also, the acidity of the WO3 surface makes this oxide a good thermal catalyst in the dehydration of alcohols to various industrially relevant chemicals. This dissertation explores the photocatalytic and thermal catalytic reactivity of nanocrystalline porous WO3 microparticles. Furthermore, investigations into the changes in WO3 reactivity are carried out after modifying the porous WO3 particles with gold nanoparticles (Au NPs). On their own, Au NPs are an important class of materials that have had a large impact in many fields such as catalysis, biomedical imaging, and drug delivery. When combined with WO3, however, their influence as part of a composite Au/WO3 catalyst has not been widely studied. Porous WO3 microparticles were first prepared using mesoporous silica (SiO2) spheres as hard templates and the physical properties of these materials were fully characterized. A facile sonochemical method was used to deposit Au NPs on the WO3 surface. Using methylene blue (MB) as a photocatalytic probe, the reaction products and the catalytic activity of WO3 and Au/WO3 catalysts were compared. Composite Au/WO3 photocatalysts exhibited significantly greater rates of MB degradation compared to pure WO3. Interestingly, the observed mechanism of MB degradation was not vastly different between the two types of catalysts. The gas-phase photocatalytic oxidation of methanol (MeOH) was studied to further understand the role of WO3 and Au NPs in these photocatalysts. Porous WO3 showed greater photooxidation rates compared to bulk WO3 because of its increased active surface area. Pure WO3 and Au NPs on porous SiO2 (SiO2-Au) were both active MeOH photooxidation catalysts and were highly selective to formaldehyde (HCHO) and methyl formate (MF), respectively. Two different mechanisms, namely band gap excitation of WO3 and surface plasmon resonance (SPR) on Au NPs, were responsible for this result. Again, the Au/WO3 composite catalysts showed greater photocatalytic activity than WO3, which increased with Au loading. This high activity led to the complete photooxidation of MeOH to carbon dioxide (CO2) over Au/WO3 catalysts. Finally, the thermal catalytic transformation of MeOH under aerobic conditions was carried out to further characterize the acid and redox active sites of WO3 and Au/WO3 catalysts. Pure WO3 was highly selective for MeOH dehydration to dimethyl ether (DME), whereas Au/WO3 showed increased oxidation selectivity to products such as HCHO, FM, and COx. The Au NPs increased the reducibility of the WO3 species, which made surface oxygen atoms more labile and reactive towards MeOH. Also, the WO3 facilitated the formation of cationic Au (Au δ+) species. This combination of effects created through a strong Au/WO3 interaction increased the activity of WO3 species, but it decreased the activity of the Au NPs.
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Dedecker, Kevin. "Multifunctional Hybrid materials for the capture and detection of volatile organic Compounds : Application to the preservation of cultural heritage objects." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLV003.

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Lors de leur stockage ou de leur exposition, les objets du patrimoine sont soumis à des processus physico-chimiques d’altération liés à leur environnement et en particulier à l’action de polluants primaires (e.g. dioxyde de soufre, oxydes d’azote), secondaires (ozone) ou de composés organiques volatils (COVs). Il a été démontré que ces gaz/vapeurs se comportent comme des agents d’hydrolyse et d’oxydation. L’acide acétique fait partie des COVs ayant un impact considérable et reconnu dans la conservation des objets du patrimoine en particulier des films photographiques. En vue de lutter contre ses effets délétères, ce projet de thèse s’est focalisé sur la conception de nouveaux matériaux poreux hybrides multifonctionnels appelés « Metal-Organic Frameworks » (MOFs) pour la capture sélective de l’acide acétique en présence d’humidité (40% humidité relative) et à température ambiante. Les remarquables propriétés d’adsorption (sensibilité, sélectivité et capacité) et la grande versatilité des MOFs (balance hydrophile/hydrophobe, taille/forme des pores,…) ont été utilisés pour préconcentrer de façon sélective l’acide acétique en milieu humide. Les matériaux les plus performants ont ensuite été préparés sous forme de nanoparticules pour l’élaboration de films minces de qualité optique afin d’en étudier les propriétés d’adsorption et de co-adsorption (acide acétique/eau) par ellipsométrie. L’incorporation de nanoparticules métalliques plasmoniques a ensuite été effectuée afin de concevoir un capteur colorimétrique. L’objectif final de ce travail est de concevoir un nouveau type d’adsorbant caractérisé par une capacité et une sélectivité d’adsorption élevée et dont on pourrait aisément déterminer le niveau de saturation en acide acétique afin d’anticiper son remplacement et ainsi assurer la préservation des objets stockés et exposés dans les musées
During their storage or their exhibition, the cultural heritage objects undergo physicochemical alteration processes related to their environment and in particular to the action of primary (e.g. sulfur dioxide, nitric oxides), secondary (ozone) pollutants or Volatile Organic Compounds (VOCs). It has been demonstrated that these gases/vapors are involved in hydrolysis and oxidation reactions. Among the most common VOCs encountered in museums, Acetic acid has a significant and recognized role in the deterioration of cultural heritage objects such as photographic films. In order to face this issue, this Ph.D. thesis focused on the design of new porous multifunctional hybrid materials denoted « Metal-Organic Frameworks » (MOFs) for the selective capture of acetic acid in the presence of moisture (40% relative humidity) and at room temperature. The remarkable adsorption properties (sensitivity, selectivity and capacity) and the great versatility of MOFs (hydrophicity/hydrophobicity balance, size/shape of pores,…) were used to preconcentrate selectively the acetic acid in humid conditions. The most performing materials were then prepared as nanoparticles and then used for the elaboration of high optical quality thin films in order to study the coadsorption (acetic acid/water) properties of MOFs by ellipsometry. The incorporation of plasmonic metal nanoparticles was then carried out in order to design a colorimetric sensor. The final objective is to devise a novel type of adsorbent that integrates a high VOC adsorption capacity and selectivity under humid conditions and an easy on-line monitoring of their saturation capacityin order to anticipate its replacement and therefore ensure the preservation of the stored and exhibited objects in museums
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Books on the topic "Porous materials. Fullerenes. Nanoparticles"

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1943-, Schwarz James A., and Contescu Cristian I. 1948-, eds. Surfaces of nanoparticles and porous materials. New York: Marcel Dekker, 1999.

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Surfaces of Nanoparticles and Porous Materials. New York: Marcel Dekker, Inc., 2003.

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Schirarz, James, and Cristian Contescu, eds. Surfaces of Nanoparticles and Porous Materials. CRC Press, 1999. http://dx.doi.org/10.1201/9780824746681.

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A, Duncan Michael, ed. Cluster materials. Stamford, CT: JAI Press, Inc., 1998.

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Khilar, Kartic C. Migration of fines in porous media. 1998.

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Book chapters on the topic "Porous materials. Fullerenes. Nanoparticles"

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Okubo, T., and M. Matsukata. "Porous Materials Controlled in Shape." In Morphology Control of Materials and Nanoparticles, 113–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08863-0_5.

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Rysiakiewicz-Pasek, E., R. Poprawski, A. Ciżman, and A. Sieradzki. "Nanocomposite Materials – Ferroelectric Nanoparticles Incorporated into Porous Matrix." In NATO Science for Peace and Security Series B: Physics and Biophysics, 171–81. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4119-5_16.

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Caldas, M. J. "Si Nanoparticles as a Model for Porous Si." In Computer Simulation of Materials at Atomic Level, 641–63. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527603107.ch31.

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Zong, Rui Long, Ji Zhou, Shi Kao Shi, and Long Tu Li. "Synthesis and Optical Properties of Metal Nanoparticles Embedded in Porous Anodic Alumina Oxide." In Materials Science Forum, 4093–96. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-960-1.4093.

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Zahmakiran, Mehmet, and Saim Özkar. "CHAPTER 3. Preparation of Metal Nanoparticles Stabilized by the Framework of Porous Materials." In Green Chemistry Series, 34–66. Cambridge: Royal Society of Chemistry, 2012. http://dx.doi.org/10.1039/9781849735469-00034.

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Manjooran, Navin J., and Gary R. Pickrell. "A Theoritical and Mathematical Basis Towards Dispersing Nanoparticles and Biological Agents in a Non Polar Solvent for Fabricating Porous Materials." In Advances in Bioceramics and Biocomposites II, Ceramic Engineering and Science Proceedings, Volume 27, Issue 6, 87–94. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470291351.ch8.

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Silva, Camila Ramos da, Martin Wallau, Ernesto A. Urquieta-González, Eduardo Prado Baston, and Rita Karolinny Chaves de Lima. "Porous carbons cast from meso- or nonporous silica nanoparticles." In Recent Progress in Mesostructured Materials - Proceedings of the 5th International Mesostructured Materials Symposium (IMMS2006), Shanghai, P.R. China, August 5-7, 2006, 377–80. Elsevier, 2007. http://dx.doi.org/10.1016/s0167-2991(07)80339-9.

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"Hybrid Materials based on Silica Nanostructures for Biomedical Scaffolds (Bone Regeneration) and Drug Delivery." In Materials Research Foundations, 103–20. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901076-4.

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Silica nanoparticles with nanoporous nature are introduced as thermally and chemically stable nanomaterials with controllable porosity and morphology. The nanoparticles can be divided into three groups: microporous, mesoporous, and macroporous based on the porous size. The use of these materials for different applications is associated with their unique properties as disinfectants. This chapter discusses different synthesis methodologies to prepare well-dispersed mesoporous silica nanoparticles (MSNs) and hollow silica nanoparticles (HSNs) with tunable dimensions ranging from a few to hundreds of nanometers of different mesostructures. Several good characteristics of the MSNs, best biocompatibility and low toxicity, are proposed as the basis of the carrier for the controlled release of drugs, genes into living cells and bone regeneration.
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Liu, Jiajia, and X. S. Zhao. "Glucose hydrogenation over Ru nanoparticles embedded in templated porous carbon." In Zeolites and related materials: Trends, targets and challenges, Proceedings of the 4th International FEZA Conference, 1315–18. Elsevier, 2008. http://dx.doi.org/10.1016/s0167-2991(08)80131-0.

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Koshevoi, Veniamin, Anton Belorus, Ilya Pleshanov, Anton Timchenko, Roman Denisenko, Daniyar Sherimov, and Ekaterina Vodkailo. "Study of Composite Structures Based on a Porous Silicon Matrix and Nanoparticles Ag/Zno Used as Non-Invasive Highly Sensitive Biosensor Devices." In Composite Materials. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.92850.

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In this work composite structures based on a porous silicon were obtained and studied. Porous matrices were formed by electrochemical etching in aqueous solutions of hydrofluoric acid. Based on the obtained substrates, por-silicon (Si)/silver (Ag) and por-Si/zinc oxide (ZnO) composite structures were formed. These composites were functionalized by various methods (electro (E)-, thermo (T)-, electrothermal exposure) as a result of which the structures were modified. When studying the samples by scanning electron microscopy (SEM), it was concluded that silver nanoparticles actively diffused into the pores under these technological modes of functionalization. The por-Si/Ag and por-Si/ZnO composite structures were also studied using the following methods: infrared (IR) spectroscopy and Raman ultrasoft X-ray emission spectroscopy. Also, the photoluminescent characteristics of the samples were studied. Based on the obtained results, it was concluded that functionalization methods actively change the phase composition of structures and the optical properties of composites.
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Conference papers on the topic "Porous materials. Fullerenes. Nanoparticles"

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Rapoport, L., N. Fleischer, and R. Tenne. "Tribological Applications of WS2 (MOS2) Inorganic Fullerene-Like Nanoparticles as Solid Lubrication." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63173.

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Fullerene-like WS2 (MoS2) nanoparticles (IF) have been studied in the past [1–3] Their efficacy as additives for lubrication fluids has been demonstrated. [4–5] Recently, IF-WS2 nanoparticles were confined inside a porous and densified bronze-graphite matrix, prepared by powder metallurgy (PM) technique. Substantial reduction in both friction and wear, and an increase in the critical load were observed [6]. New applications of IF nanopartcles as development of polymer nanocomposites, burnishing and friction of ceramic materials under severe contact conditions are presented in this work.
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Ozawa, Masaki. "Spiral carbon nanoparticles." In NANONETWORK MATERIALS: Fullerenes, Nanotubes, and Related Systems. AIP, 2001. http://dx.doi.org/10.1063/1.1420164.

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Kanzow, H., A. Ding, H. Sauer, T. Belz, and R. Schlögl. "Chains of carbon nanoparticles from the interaction of fullerenes with thin metal films." In ELECTRONIC PROPERTIES OF NOVEL MATERIALS--SCIENCE AND TECHNOLOGY OF MOLECULAR NANOSTRUCTURES. ASCE, 1999. http://dx.doi.org/10.1063/1.59783.

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Hartono, Sandy Budi, Lannie Hadisoewignyo, Wenny Irawaty, Luciana Trisna, and Robby Wijaya. "Porous silica nanoparticles as carrier for curcumin delivery." In PROCEEDINGS OF THE 3RD INTERNATIONAL CONFERENCE ON MATERIALS AND METALLURGICAL ENGINEERING AND TECHNOLOGY (ICOMMET 2017) : Advancing Innovation in Materials Science, Technology and Applications for Sustainable Future. Author(s), 2018. http://dx.doi.org/10.1063/1.5030229.

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Chebodaeva, V., M. Sedelnikova, S. Gnedenkov, S. Sinebryukhov, V. Egorkin, and Yu Sharkeev. "Characterization of the porous micro-arc coatings containing boehmite nanoparticles." In PROCEEDINGS OF THE ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES. Author(s), 2018. http://dx.doi.org/10.1063/1.5083290.

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Yousif, Ali A., Alwan M. Alwan, and Husam R. Abed. "Optimizing of macro porous silicon morphology for creation of SnO2/CuO nanoparticles." In 2ND INTERNATIONAL CONFERENCE ON MATERIALS ENGINEERING & SCIENCE (IConMEAS 2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0000150.

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Kondo, Toshiaki, Kazuyuki Nishio, and Hideki Masuda. "Surface-enhanced Raman scattering in three-dimensional ordered Au nanoparticles in anodic porous alumina matrix." In Smart Nano-Micro Materials and Devices, edited by Saulius Juodkazis and Min Gu. SPIE, 2011. http://dx.doi.org/10.1117/12.903240.

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Kumar, Vipin, P. D. Sahare, S. K. Tripathi, Keya Dharamvir, Ranjan Kumar, and G. S. S. Saini. "Photoluminescence of Cu doped sponge-like porous ZnO nanoparticles synthesized via chemical route." In INTERNATIONAL CONFERENCE ON ADVANCES IN CONDENSED AND NANO MATERIALS (ICACNM-2011). AIP, 2011. http://dx.doi.org/10.1063/1.3653610.

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Başak, F. K., and E. Kayahan. "Synthesis of nanoparticles by laser ablation from heat-treated porous silicon for biomedical applications." In PROCEEDINGS OF THE 10TH INTERNATIONAL ADVANCES IN APPLIED PHYSICS AND MATERIALS SCIENCE CONGRESS & EXHIBITION. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0058277.

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T, Petrov, I. Markova Deneva, Chauvet O, and Denev I. "Synthesis and Study of Porous Carbon Foam/Cu (Cu-Sn) Nanoparticles Composites for Electrode Materials." In 9th International Conference on Multi-Material Micro Manufacture. Singapore: Research Publishing Services, 2012. http://dx.doi.org/10.3850/978-981-07-3353-7_266.

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Reports on the topic "Porous materials. Fullerenes. Nanoparticles"

1

Author, Not Given. Preparation of monolithic porous carbon materials using controlled functionalization of fullerenes. Office of Scientific and Technical Information (OSTI), March 1996. http://dx.doi.org/10.2172/10129817.

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