Academic literature on the topic 'Nano-porous materials'

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Journal articles on the topic "Nano-porous materials"

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Blin, Jean-Luc, Marie-José Stébé, and Bénédicte Lebeau. "Hybrid/porous materials obtained from nano-emulsions." Current Opinion in Colloid & Interface Science 25 (October 2016): 75–82. http://dx.doi.org/10.1016/j.cocis.2016.07.002.

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Zheng, Shuilin, Chunhua Bai, and RuQin Gao. "Preparation and Photocatalytic Property ofTiO2/Diatomite-Based Porous Ceramics Composite Materials." International Journal of Photoenergy 2012 (2012): 1–4. http://dx.doi.org/10.1155/2012/264186.

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The diatomite-based porous ceramics was made by low-temperature sintering. Then the nano-TiO2/diatomite-based porous ceramics composite materials were prepared by hydrolysis deposition method with titanium tetrachloride as the precursor ofTiO2and diatomite-based porous as the supporting body of the nano-TiO2. The structure and microscopic appearance of nano-TiO2/diatomite-based porous ceramics composite materials was characterized by XRD and SEM. The photocatalytic property of the composite was investigated by the degradation of malachite green. Results showed that, after calcination at550°C,TiO2thin film loaded on the diatomite-based porous ceramics is anataseTiO2and average grain size ofTiO2is about 10 nm. The degradation ratio of the composite for 5 mg/L malachite green solution reached 86.2% after irradiation for 6 h under ultraviolet.
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Mohd Ibrahim, Mohd Yusak, Putra Jaya Ramadhansyah, Hainin Mohd Rosli, Mohd Haziman Wan Ibrahim, and M. N. Fadzli. "Utilization of Nano Silica as Cement Paste in Mortar and Porous Concrete Pavement." Advanced Materials Research 1113 (July 2015): 135–39. http://dx.doi.org/10.4028/www.scientific.net/amr.1113.135.

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The high percentage of porosity in porous concrete pavement tends to decrease its strength. In concrete industry, nano silica is one of the most popular materials that will improve the properties of cementitious materials. This paper, prepared to review the effect of nano silica in cement paste and mortar related to porous concrete pavement. It was found that, by incorporating nano silica with the right composition in cement paste and mortar, it will improve their mechanical properties. By incorporating nano silica in the mixture, it can be predicted that the strengthening effect of nano silica would be further enhanced in porous concrete because the nano silica improve not only the cement paste, but also the interface between paste and aggregate.
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Huck, Johanna M., Li-Chiang Lin, Adam H. Berger, Mahdi Niknam Shahrak, Richard L. Martin, Abhoyjit S. Bhown, Maciej Haranczyk, Karsten Reuter, and Berend Smit. "Evaluating different classes of porous materials for carbon capture." Energy Environ. Sci. 7, no. 12 (2014): 4132–46. http://dx.doi.org/10.1039/c4ee02636e.

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Li, Chunyang, Yan Liu, Guojun Li, and Ruiming Ren. "Preparation and electrochemical properties of nanostructured porous spherical NiCo2O4 materials." RSC Advances 10, no. 16 (2020): 9438–43. http://dx.doi.org/10.1039/d0ra00259c.

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Zhang, Hong Da, Yue Wang, Li Wei Liu, Hai Tao Feng, Lin Li, Jian Quan Liang, and Wei Sun. "Analysis on the Selection of Low Temperature Resistant Materials for Electric Equipment State Monitoring Device in Cold Areas." Key Engineering Materials 842 (May 2020): 251–56. http://dx.doi.org/10.4028/www.scientific.net/kem.842.251.

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As the important device to perceive the operating state of grid, the condition monitoring device of electric equipment solves such problems as the high rate of false alarm and failure of device caused by the low temperature in winter of cold areas. This paper measures the thermal conductivity of such three kinds of materials as asbestos, rubber and nano porous aerogels in the temperature range of -55°C to +80°C by steady state method, and analyzes the influence of temperature on the thermal conductivity of three materials. According to the result of experiment, the thermal conductivity of nano porous aerogels is the lowest and is affected least by temperature among three kinds of materials. Nano porous aerogels apply to state monitoring device operated in cold areas; and rubber can also be used as thermal insulation material when the operating temperature is generally higher than -20°C.
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Lei, Yong, Wei Chen, Bin Lu, Qin-Fei Ke, and Ya-Ping Guo. "Bioinspired fabrication and lead adsorption property of nano-hydroxyapatite/chitosan porous materials." RSC Advances 5, no. 120 (2015): 98783–95. http://dx.doi.org/10.1039/c5ra17569k.

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Zhao, Bin Yuan, Rong Bin Li, Jie Xu, Dan Dan Lin, Xian Chang He, Tong Xiang Fan, Di Zhang, and Ke Ao Hu. "CVD Grow of Nano Diamond and Other Carbon Materials on Porous Carbon." Advances in Science and Technology 48 (October 2006): 24–30. http://dx.doi.org/10.4028/www.scientific.net/ast.48.24.

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In this paper, porous carbon was made from biomass derived carbonaceous mesophase and carbonaceous fillers, and further applied as the substrate for CVD grow of nano carbon materials. With the assistance of microwave plasma, the acetone gas was decomposed into carbon and grew on the surface of the porous carbon, which produce ballas diamonds, carbon tubes, nets, petal, and other structures.
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Ding, Kui, Qin Liu, Yakun Bu, Yiyin Huang, Jiangquan Lv, Jing Wu, Syed Comail Abbas, and Yaobing Wang. "Scalable synthesis of nano-sandwich N-doped carbon materials with hierarchical-structure for energy conversion and storage." RSC Advances 6, no. 96 (2016): 93318–24. http://dx.doi.org/10.1039/c6ra12283c.

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In this work, we report the synthesis a series of nano-sandwich porous carbon/graphene/porous carbon nanomaterials with function-oriented hierarchical-structure for applications in microbial fuel cells, supercapacitor and gas storage.
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Guirguis, Albert, James W. Maina, Xiwang Zhang, Luke C. Henderson, Lingxue Kong, Hokyong Shon, and Ludovic F. Dumée. "Applications of nano-porous graphene materials – critical review on performance and challenges." Materials Horizons 7, no. 5 (2020): 1218–45. http://dx.doi.org/10.1039/c9mh01570a.

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Dissertations / Theses on the topic "Nano-porous materials"

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Mohamed, Rozita. "Preparation of nano-structured macro-porous materials." Thesis, University of Newcastle upon Tyne, 2011. http://hdl.handle.net/10443/1317.

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This research reveals a catalyst development towards achieving catalysts with hierarchical porous structures with enhanced mechanical properties by using nano-structured macro-porous PolyHIPE polymer. This work can be divided into two parts: the fabrication and its characterisation of hierarchical metal structure using PHP and other fibre materials; and the fabrication and characterisation of PHP with silica particles and glass wool, further coated with silane material as templates. A catalyst system was successfully fabricated forming a 3D-interconnecting network of pore size, ranging from tens of micrometers and gradually reducing finally to nanometer scale. An electroless deposition flow through method using Ni-B bath solution was performed on the templates and was subsequently heat treated to obtain porous metallic structures, thus providing accessibility for reactants to the surface and for products away from the surface. Meanwhile, silanated templates were produced by surface treatment. This was performed by submerging templates directly into the silanes solution at room temperature (24°C) using a water-ethanol based solution of the silanes. The polymer-metal/alloy or silica functionalized based composite demonstrated a high impact strength. The results showed that not only hierarchical pore structure was formed, but it was also demonstrated that silica particles were totally and uniformly covered/coated by metal deposit and had good adhesion. When used on glass wool, silanation had greatly improved the bond strengths of metal deposits to the templates. SEM micrographs revealed that the formation of cracks were tremendously reduced and exhibited higher bond strengths due to silanated glass surface. It is expected to be more efficient and robust in the case of an enhanced surface area, and most desirable in catalyst applications.
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Cervin, Nicholas. "Porous Cellulose Materials from Nano Fibrillated Cellulose." Licentiate thesis, KTH, Fiberteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104196.

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In the first part of this work a novel type of low-density, sponge-like material for the separation of mixtures of oil and water has been prepared by vapour deposition of hydrophobic silanes on ultra-porous nanocellulose aerogels. To achieve this, a highly porous (> 99 %) nanocellulose aerogel with high structural flexibility and robustness is first formed by freeze-drying an aqueous dispersion of the nanocellulose. The density, pore size distribution and wetting properties of the aerogel can be tuned by selecting the concentration of the nanocellulose dispersion before freeze-drying. The hydrophobic light-weight aerogels are almost instantly filled with the oil phase when they selectively absorb oil from water, with a capacity to absorb up to 45 times their own weight. The oil can also be drained from the aerogel and the aerogel can then be subjected to a second absorption cycle.In the second part of the work a novel, lightweight and strong porous cellulose material has been prepared by drying aqueous foams stabilized with surface-modified NanoFibrillated Cellulose (NFC). Confocal microscopy and high-speed video imaging show that the long-term stability of the wet foams can be attributed to the octylamine-coated, rod-shaped NFC nanoparticles residing at the air-liquid interface which prevent the air bubbles from collapsing or coalescing. Careful removal of the water yields a porous cellulose-based material with a porosity of 98 % and a density of 30 mg cm-3. These porous cellulose materials have a higher Young’s modulus than other cellulose materials made by freeze drying and a compressive energy absorption of 56 kJ m-3 at 80 % strain. Measurements with an autoporosimeter reveal that most pores are in the range of 300 to 500 μm.

QC 20121107

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Traum, Matthew J. (Matthew Jason) 1977. "Latent heat fluxes through nano-engineered porous materials." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40361.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.
Vita.
Includes bibliographical references (p. 201-206).
Micro- and nano-scale truss architectures provide mechanical strength, light weight, and breatheability in polymer barriers. Liquid evaporation and transport of resulting vapor through truss voids (pores) cools surfaces covered by the barriers, suggesting the possibility for simultaneous protection of humans from mechanical and thermal stresses. Design of real systems employing this technique requires quantitative understanding of vapor transport within the truss pores and accompanying latent heat lift under ambient temperature and pressure. One application is desert Soldier protection. Need exists to clarify whether smaller pore diameters affect surface cooling and water vapor transport owing to fluid rarefaction or surface interactions. Contrasting previous studies where pressure within capillaries of fixed diameter was modulated, in this thesis Knudsen Number (Kn) was systematically varied by changing pore diameter at constant pressure (one atmosphere). Cooling efficacy was assessed for porous membranes with pore diameters ranging from 39 to 14,400 nm, varied in regular increments. Evaporative cooling experiments simulated combined daytime desert solar and metabolic thermal load on humans by heating an evaporation chamber partially filled with liquid water and capped with a porous membrane.
(cont.) Hot, dry gas was swept over the membrane, simulating desert ambient conditions. By continuously weighing the entire evaporation apparatus, intrinsic pore diffusion coefficients for dilute water vapor in air were deduced for each membrane by correcting for upstream and downstream boundary layer mass transfer resistances. Pore diameter impact on evaporative cooling of an underlying surface by water vapor transport across two types of porous polymer membranes with micro/nano-scale truss architecture was quantified. This research showed that transition diffusion regime theory predicted observed transport rates to better than + 35% for pore diameters between 14,400 nm and 60 nm (0.01 < Kn < 3). Despite low membrane porosity, substantial Fractional Accomplished Cooling (up to 60% maximum achievable) was demonstrated via latent heat transport. The absolute magnitude of achieved surface cooling was 3.7 K to 14.0 K. An engineering design correlation was developed linking latent heat transport at various Knudsen Numbers (pore diameters) to evaporative cooling efficacy. Results of this research inform design of porous mechanical barriers that permit evaporative cooling of underlying surfaces.
by Matthew J. Tram.
Ph.D.
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Burt, Luke Anthony. "Synthesis and characterisation of novel functional phthalocyanine nano-porous materials." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31347.

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This project was focused on the synthesis of novel phthalocyanines for the construction of porous molecular crystals that incorporate the desirable properties associated with phthalocyanine complexes. Conventional phthalocyanines are relatively insoluble, therefore, remain difficult to process, characterise and effectively crystallise. To counteract this problem, bulky 2,6-di-iso-propylphenoxy substituents were placed around the aromatic core of the phthalocyanine macrocycle and proved to successfully inhibit the co-facial aggregation which limits their solubility. These bulky groups also direct the crystallisation of the phthalocyanine macrocycle inducing a cubic packing arrangement with significant accessible solvent filled voids. The aim of this work was the modification of this 2,6-di-isopropylphenoxy substituted phthalocyanine to enhance the magnetic and catalytic properties and demonstrate its suitability as a platform for creating iso-reticular systems with increased functionality. It was anticipated that mixed double decker complexes of this derivative and another phthalocyanine macrocycle would form crystals with the same cubic spatial arrangement, while maintaining their high catalytic activity or single molecular magnetism behaviour. Firstly, a larger number of transition metals along with some lanthanide metals have been incorporated within this substituted phthalocyanine, extending the previous work on this system. Furthermore, the corresponding contracted macrocycle boron subphthalocyanine was also investigated. While the 2,6-diisopropylphenyl substituents did not greatly affect the electronic properties of the subphthalocyanine, the solid state properties of the material proved interesting. The lanthanide phthalocyanine complexes were further employed in the preparation of lanthanide double decker phthalocyanines that possess single molecule magnetic properties. While retaining this desired property, they also crystallised to produce clathrates with large solvent filled voids. A different double decker complex which contained two iron metal centres bridged by a single nitrogen atom was also prepared from the octa substituted 2,6-di-iso-propylphenoxy phthalocyanine and an unsubstituted phthalocyanine. This nitrido bridged di-iron phthalocyanine complex displayed similar catalytic activity to previously reported systems of this kind and crystallised to afford cubic crystals with large solvent filled voids. These were shown to be accessible by both solvent and ligand exchange. Suitable bidentate ligands for structural stabilisation could be also incorporated. Finally, the preparation of an alternatively substituted phthalocyanine for the construction of a potential porous molecular crystal was studied. By synthesising a hexamethylindan substituted phthalonitrile, it was possible to obtain a soluble phthalocyanine that crystallised to give a clathrate that contained large one-dimensional voids.
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Kodumuri, Pradeep. "IN-SITU GROWTH OF POROUS ALUMINO-SILICATES AND FABRICATION OF NANO-POROUS MEMBRANES." Cleveland State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=csu1243304850.

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Cheng, Chuan, and 程川. "Electro-chemo-mechanics of anodic porous alumina nano-honeycombs: self-ordered growth and actuation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50899582.

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Self-ordered anodic porous alumina with a nano-honeycomb structure has recently been extensively used as templates for the synthesis of various nanomaterials for diverse applications. However, due to the insufficient knowledge on the combined electro-chemo-mechanical processes, the formation mechanism of self-ordering has been under debate for decades without clear conclusions. Also, fast fabrication of highly self-ordered and mechanically stable anodic porous alumina is still a challenge. Furthermore, the actuation behavior of anodic porous alumina upon external mechanical and electrical triggering in an electrochemical cell has not been exploited. In this work, firstly, we investigated the self-ordering mechanism by establishing a kinetics model involving the Laplacian electric potential distribution and a continuity equation for current density within the oxide body. Current densities governed by the Cabrera-Mott equation are formed by ion migration within the oxide as well as across the interfaces. The pore channel growth, due to electric-field-assisted reactions, is governed by Faraday’s law. Real-time evolution of pre-patterned pore channel growth was simulated in two-dimensional cases by finite element method. The simulations revealed a parameter domain within which pre-patterned pore channels will continue to grow in a stable manner during the subsequent anodization if the pre-patterns are commensurate with the self-ordered configurations, or these are driven into stable if the pre-patterns do not initially match the self-ordered configurations. This was verified in experimentally observed pore channel growth under the guidance of pre-patterns made by focused-ion-beam milling. Furthermore, the simulations revealed that ionization reaction on (001) oriented Al grain is relatively easier than that on (101) grain, which results in stable and unstable pore channel growth on (001) and (101) Al grains, respectively, both of which were observed from the simulations and experiments. Secondly, a scheme on quantitative evaluation of self-ordering qualities in anodic porous alumina has been developed, based on which we systematically searched the optimum self-ordering conditions, by varying the key anodization factors, including substrate grain orientation, electrolyte concentration, temperature, voltage, and time. A high acid concentration and high temperature anodization method was found. Compared with conventional methods, the present method can realize fast formation of highly self-ordered, and mechanically stable anodic porous alumina under a continuous range of anodization voltage with tunable interpore distances. Thirdly, reversible bending was found in anodic porous alumina-Al composites upon cyclic electric actuation, as directly observed by an optical microscope and detected by in situ nanoindentation. The bending is thought to be the result of charge-induced surface stresses in the nanoporous alumina. The results suggest a new type of composite materials for applications as micro-scale actuators to transform electrical energy into mechanical energy. Furthermore, the composite exhibits significant softening during in situ nanoindentation when the estimated maximum stress underneath the indenter is exerted on the metal/oxide interface. Softening was further verified by in situ microindentation. Electron microscopy examination indicated that the softening is due to a combination of high compression stress and electric field acting near the interface, which enhance ionization reaction and cause the interface to move faster into the substrate.
published_or_final_version
Mechanical Engineering
Doctoral
Doctor of Philosophy
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Greco, Pier Paolo. "Development of novel polymeric and composite nano-structured micro-porous materials for impact resistance applications." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2517.

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Impact resistant materials (IRMs) are widely used in the automotive and packaging industry. Their main purpose is the protection of the transported occupants or goods. Cellular materials as well as structures combine lightness with large deformation under load. The energy absorption mechanism is provided by limiting the peak load and ensuring the elastic deformation of the IRMs. Polymeric foams are largely used as IRMs due to their cellular structure. Prediction of the foam properties in terms of Young’s Modulus (Elastic Modulus) and the onset of Plateau Region can be related to the foam density and the mechanical properties of the bulk material (Gibson and Ashby model). The structure of the foam is only partly accounted for in the Gibson and Ashby model in terms of material density. However, it is possible to produce cellular materials with the same density but very different internal architectures. This cannot easily be exploited in conventional polymer foams but the processing of High Internal Phase Emulsion (PolyHIPE) and its polymerisation route to produce PolyHIPE Polymers (PHPs) can produce materials with very different structures. Experiments have revealed that the PHPs properties are dictated by their detailed structure. Elastic PHPs with: 1) varying ratio of polymerizable oil phase with respect to aqueous phase and 2) varying mixing time/energy input were produced and tested by mechanical compression at different temperatures and strain rates. The elastic modulus increases with a quadratic law as a function of the polymerizable oil phase content of the HIPE when the mixing time is the same, as predicted by the model. The Specific Absorption Energy (SAE), represented by the area under the stress-strain curve, increases in a similar way. Increasing mixing time on HIPE has the effect of modifying the cellular structure. Smaller pores and narrower distribution of pores are observed. Such features are consistent for any set of PHPs densities and represent a design tool when some specific mechanical characteristics are prescribed. The assessment of process-structure-properties relationships was performed by combining the mechanical response of the various PHPs with the imaging of their structure by Scanning Electron Microscopy. The properties of PHPs were benchmarked with reference to two commercially available products. One material is characterised by a porous structure with a relatively high Young’s Modulus while the other by a non-porous and composite-like solid structure with lower elastic modulus. The properties of the PHPs can be engineered to shift from a foam-like material to a composite-like through the processing parameters which in turn modify the material porous structure. The temperature has very limited effect on the PHPs material unlike for the reference commercial materials. The enhancement of properties (increasing Elastic Modulus and SAE) induced by changing the processing route are remarkable for such a class of porous materials. When plotted on a Modulus-Density chart, the PHPs fill an existing material-chart gap, representing a new class of materials and opening new possibilities as IRMs.
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Kirstein, Johanna, Christophe Jung, Christian Hellriegel, and Christoph Bräuchle. "Single molecule spectroscopy: translational and rotational diffusion of single fluorescent dyes in nano-structured porous materials." Diffusion fundamentals 2 (2005) 94, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14431.

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Daniel, Hedbom. "Linker substitution in ZIF-8 and its effect on the selective uptake of the greenhouse gases CH4, CO2 and SF6." Thesis, Uppsala universitet, Nanoteknologi och funktionella material, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-434657.

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In this master thesis project, attempts were made to synthesize, pore size tailor, and characterize ZIF-8 and several mixed-linker ZIF structures to improve capture of the greenhouse gasses CH4, CO2, and SF6. Three experimental linkers, 2-methylbenzimidazole, 2-aminobenzimidazole, and 5-nitrobenzimidazole were chosen to gradually substitute 2-methylimidazole as the linker in ZIF-8.  This substitution was intended to gradually reduce pore sizes and possibly adding functionality to the apertures present in ZIF-8 (three different series). The methods of synthesis were first evaluated by performance and modified. Three series of ZIF-hybrids were then synthesized and characterized using PXRD, FTIR, 1HNMR, SEM, extensive sorption measurements, and subsequent modeling to evaluate any success tailoring the hybrid ZIF apertures to increase gas sorption. After modifying synthesis conditions, the undertaking was deemed a success as all three linkers were possible to incorporate to some degree. Hybrid ZIFs were mostly XRD-crystalline. The cleaning process was deemed sufficient. Linker incorporation was not complete but increased with the added linker. Sodalite topology was confirmed in ZIF-8 samples and confirmed as modified in hybrid ZIFs. The hybrid ZIFs did indeed show altered sorption results and surprisingly promising results regarding gas selectivity (favoring sorption of one gas over that of another).
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Ruan, Juanfang. "Development of electron microscopy towards nano-structured porous materials : focus on novel zeolites from layered silicates and chiral mesoporous nanotubes /." Stockholm : Department of Physical, Inorganic and Structural Chemistry, Stockholm university, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7439.

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Books on the topic "Nano-porous materials"

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Meeting, on Mesoporous Crystals and Related Nano-Structured Materials (2004 Stockholm Sweden). Mesoporous crystals and related nano-structured materials: Proceedings of the Meeting on Mesoporous Crystals and Related Nano-Structured Materials, Stockholm, Sweden, 1-5 June 2004. Amsterdam, The Netherlands: Elsevier, 2004.

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Terasaki, Osamu. Mesoporous Crystals and Related Nano-Structured Materials, Volume 148: Proceedings of the Meeting on Mesoporous Crystals and Related Nano-Structured Materials, ... (Studies in Surface Science and Catalysis). Elsevier Science, 2004.

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Book chapters on the topic "Nano-porous materials"

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Verdier, M., K. Termentzidis, and D. Lacroix. "Modeling Thermal Transport in Nano-Porous Semiconductors." In Submicron Porous Materials, 253–84. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53035-2_9.

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Xu, Feng Lan, Yu Bao Li, Jimei Han, and Guo Yu Lv. "Biodegradable Porous Nano-Hydroxyapatite/Alginate Scaffold." In Materials Science Forum, 189–92. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-966-0.189.

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Shi, Kaihang, Erik E. Santiso, and Keith E. Gubbins. "Current Advances in Characterization of Nano-porous Materials: Pore Size Distribution and Surface Area." In Porous Materials, 315–40. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65991-2_12.

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Cheng, Lin, Yu Bao Li, Yi Zuo, Gang Zhou, Hua Nan Wang, and Ming Bo Wang. "Preparation of Nano-Hydroxyapatite/Polyamide6 Composite Porous Scaffold for Bone Tissue Engineering." In Materials Science Forum, 793–96. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-431-6.793.

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Lee, Seung Hun, Eun A. Lee, Hae Jin Hwang, Ji Woong Moon, In Sub Han, and Sang Kuk Woo. "Solvents Effects on Physicochemical Properties of Nano-Porous Silica Aerogels Prepared by Ambient Pressure Drying Method." In Materials Science Forum, 910–13. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-995-4.910.

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Zhao, Bin Yuan, Rong Bin Li, Jie Xu, Dan Dan Lin, Xian Chang He, Tong Xiang Fan, Di Zhang, and Keao Hu. "CVD Grow of Nano Diamond and Other Carbon Materials on Porous Carbon." In Advances in Science and Technology, 24–30. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908158-04-4.24.

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Wang, Can, Gaimei Zhang, Xiaoli Song, Qiang Chen, and Jingting Zhang. "Synthesis and Characterization of Nano-Porous Oxidized Silica Film with Low Dielectric Constant." In Advanced Graphic Communications, Packaging Technology and Materials, 769–75. Singapore: Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-10-0072-0_95.

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Zheng, Hua De, Ying Jun Wang, Chun Rong Yang, Xiao Feng Chen, and Na Ru Zhao. "Investigation on the Porous Biomaterial for Bone Reconstruction with Addition of Bio-Mimetic Nano-Sized Inorganic Particles." In Key Engineering Materials, 1534–37. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-410-3.1534.

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Muto, Shunsuke, A. V. Vasin, Yukari Ishikawa, Noriyoshi Shibata, Jarno Salonen, and Vesa Pekka Lehto. "Nano-Order Structural Analysis of White Light-Emitting Silicon Oxide Prepared by Successive Thermal Carbonization/Oxidation of the Porous Silicon." In Materials Science Forum, 1127–30. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-462-6.1127.

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Akay, G., M. A. Bokhari, V. J. Byron, and M. Dogru. "Development of Nano-Structured Micro-Porous Materials and their Application in Bioprocess-Chemical Process Intensification and Tissue Engineering." In Chemical Engineering, 171–97. Chichester, UK: John Wiley & Sons, Ltd, 2005. http://dx.doi.org/10.1002/0470025018.ch7.

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Conference papers on the topic "Nano-porous materials"

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Gupta, D., P. B. Barman, and S. K. Hazra. "Hydrogen response of porous palladium nano-films." In ADVANCED MATERIALS AND RADIATION PHYSICS (AMRP-2015): 4th National Conference on Advanced Materials and Radiation Physics. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4929217.

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du Plessis, Monuko. "Integrated Porous Silicon Nano-Explosive Devices." In 2006 International Workshop and Tutorials on Electron Devices and Materials. 7th Annual. IEEE, 2006. http://dx.doi.org/10.1109/sibedm.2006.231990.

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Zhou, Yingke. "Design and electrochemical performance of nano-micro structured porous materials." In Nano-Micro Conference 2017. London: Nature Research Society, 2017. http://dx.doi.org/10.11605/cp.nmc2017.01021.

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Lin, Jia-Chuan, Wei-Chih Tsai, Meng-Kai Hsu, Hsi-Ting Hou, and Yi-Hung Chen. "Thermal sensors based on nano porous silicon." In SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, edited by Vijay K. Varadan. SPIE, 2010. http://dx.doi.org/10.1117/12.853184.

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Fakhri, Makram A., Basam G. Rashid, Najwan H. Numan, Ban A. Bader, Farah G. Khalid, Thoalfiqar A. Zaker, and Evan T. Salim. "Synthesis of nano porous silicon heterostructures for optoelectronic applications." In 4TH ELECTRONIC AND GREEN MATERIALS INTERNATIONAL CONFERENCE 2018 (EGM 2018). Author(s), 2018. http://dx.doi.org/10.1063/1.5080829.

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Hyunwoo Lee, Eunjoo Lee, and Soohong Lee. "Investigation of nano-porous silicon antireflection coatings for crystalline silicon solar cells." In 2006 IEEE Nanotechnology Materials and Devices Conference. IEEE, 2006. http://dx.doi.org/10.1109/nmdc.2006.4388757.

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Eunjoo Lee and Soohong Lee. "Characterization and properties of a textured silicon surface with nano-porous layer." In 2006 IEEE Nanotechnology Materials and Devices Conference. IEEE, 2006. http://dx.doi.org/10.1109/nmdc.2006.4388801.

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Miyazaki, Koji. "Heat Conduction in a Nano-Porous Material and Its Application." In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2011. http://dx.doi.org/10.1115/icnmm2011-58293.

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In this study we introduce our numerical and experimental works for the thermal conductivity reduction by using a porous material. Recently thermal conductivity reduction has been one of the key technologies to enhance the figure of merit (ZT) of a thermoelectric material. We carry out numerical calculations of heat conduction in porous materials, such as, phonon Boltzmann transport (BTE), molecular dynamics simulations (MD), in order to investigate the mechanism of the thermal conductivity reduction of a porous material. In the BTE, we applied the periodic boundary conditions with constant heat flux to calculate the effective thermal conductivity of porous materials. In the MD simulation, we calculated phonon properties of Si by using the Stillinger-Weber potential at constant temperature with periodic boundary conditions in the x,y and z directions. Phonon dispersion curves of single crystal of Si calculated from MD results by time-space 2D FFT are agreed well with reference data. Moreover, the effects of nano-porous structures on both the phonon group velocity and the phonon density of states (DOS) are discussed. At last, we made a porous p-type Bi2Te3 by using self-assembly. The average diameter of the holes was 20 nm, and the average pitch of the hexagonally arranged holes was 50 nm. The measured cross-plane thermal conductivity is 0.25W/(m·K). The thermal conductivity of the thin film is extremely lower than that of the bulk material without any major decrease in the electrical conductivity. The figure of merit of Bi0.4Te3Sb1.6 is enhanced to 1.8 at room temperature (300K) by the formation of a porous thin film.
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Han, Bai, Xuesong Lv, Xin Gao, and Jianyu Wang. "Study on the effect of nano porous structure on the conductivity current of LDPE/SiO2 nano-composites." In 2018 12th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2018. http://dx.doi.org/10.1109/icpadm.2018.8401196.

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Prasher, Ravi, and David Song. "Microscopic Effective Medium Model for Thermal Conductivity of Two Dimensional Nano-Porous and Micro-Porous Media." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72115.

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Two-dimensional Nano-porous (NP) and micro-porous (MP) materials are currently used in a variety of applications which require the knowledge of the thermal conductivity (k). In NP and MP materials, two pertinent length scales determine the phonon thermal conductivity: 1) the ratio of inter-pore distance, δ, and the mean free path (m.f.p.) of phonons, 1, 2) the ratio of the pore diameter, d, and the m.f.p. of phonons. This is schematically shown in Fig. 1. In the traditional diffusion-approximation (macroscopic models) based models (1 ≪ d, δ) for the thermal conductivity of porous materials, the effective thermal conductivity, keff, of the porous material for a given shape of the pores and direction of the heat flow is only a function of the volume fraction (φ) of the pores. Therefore, in the diffusion approximation, keff can be written as keff=kmf(φ)(1) where km is the thermal conductivity of the host medium. Our focus is on cylindrical pores. We only consider the heat flow in the transverse direction as shown in Fig. 1a. For example, if φ &lt;40%, Maxwell-Garnett effective medium model (MG EMM) can be used. f(φ) for MG EMM is given by f(φ)=1−φ1+φ(2) Experimental data on two-dimensional micro-porous silicon made of cylindrical pores have shown that the macroscopic model given by Eq. (1) grossly over predicts keff of the porous materials. In MP and NP materials, the phonon transport is ballistic in nature because of the dominant scattering of phonons from the pore boundaries. Ballistic transport becomes dominant when m.f.p is comparable to or larger than d and δ. In this regime, the Boltzmann Transport Equation (BTE) must be solved without invoking the diffusion approximation. Solving the BTE for such a complex network of pores is a challenging task, and a few previous works exist where BTE was solved numerically under various simplifying assumptions regarding the geometry and the arrangement of the pores. Both of these investigations assumed rectangular pores for two-dimensional composite or cubical pores for three-dimensional composites; however, in reality, these pores are never so simple in their geometry. Typically, these pores are cylindrical in shape for two-dimensional composites and nearly spherical in shape for three-dimensional composites. The solution of BTE for the multitude of non-planar pores, although achievable, will be a very tedious task.
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Reports on the topic "Nano-porous materials"

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Kriven, Waltraud M. Instrumentation for Nano-porous, Nano-particulate Geopolymeric Materials Research. Fort Belvoir, VA: Defense Technical Information Center, November 2008. http://dx.doi.org/10.21236/ada589783.

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Kriven, Waltraud M. Instrumentation for Nano-porous, Nano-particulate Geopolymeric Materials Research. Fort Belvoir, VA: Defense Technical Information Center, November 2008. http://dx.doi.org/10.21236/ada580696.

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Schmidt, Jordan. Enabling Technologies for High-Throughput Screening of Nano-Porous Materials: Collaboration with the Nanoporous Materials Genome Center. Office of Scientific and Technical Information (OSTI), January 2016. http://dx.doi.org/10.2172/1235485.

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