Relevant bibliographies by topics / Silicon dioxide matrix

Academic literature on the topic 'Silicon dioxide matrix'

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Published: 4 June 2021
Last updated: 9 February 2022

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Journal articles on the topic "Silicon dioxide matrix"

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Grigor’ev, L. V., and A. V. Mikhaĭlov. "Investigating the energy spectrum of silicon nanoclusters in a silicon dioxide matrix." Journal of Optical Technology 81, no. 10 (October 1, 2014): 616. http://dx.doi.org/10.1364/jot.81.000616.

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Shimizu-Iwayama, T., S. Nakao, K. Saitoh, and N. Itoh. "Photoluminescence from nanoparticles of silicon embedded in an amorphous silicon dioxide matrix." Journal of Physics: Condensed Matter 6, no. 39 (September 26, 1994): L601—L606. http://dx.doi.org/10.1088/0953-8984/6/39/005.

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Ma, Run Bo, Shi Meng Xu, and Jian Hua Du. "Application and Research of Monte Carlo Method on Surface Morphology of Copper Matrix Composites." Advanced Materials Research 791-793 (September 2013): 519–22. http://dx.doi.org/10.4028/www.scientific.net/amr.791-793.519.

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Through the analysis and research on the microstructure and phase diagram of copper matrix composites, by use of collage method to approximate graphite particle and silicon dioxide particle, combined with statistical method analyzing some statistical characteristics of graphite particle and silicon dioxide particle .On the basis of the result that have been get in this paper, microstructure and phase diagram of copper matrix composites was simulated by taking advantage of direct Monte Carlo method.
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Komogortsev, S. V., T. N. Patrusheva, D. A. Balaev, E. A. Denisova, and I. V. Ponomarenko. "Cobalt ferrite nanoparticles in a mesoporous silicon dioxide matrix." Technical Physics Letters 35, no. 10 (October 2009): 882–84. http://dx.doi.org/10.1134/s1063785009100022.

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Xiong, Chao, Weilong Xu, Yu Zhao, Jin Xiao, and Xifang Zhu. "New design graded refractive index antireflection coatings for silicon solar cells." Modern Physics Letters B 31, no. 19-21 (July 27, 2017): 1740028. http://dx.doi.org/10.1142/s0217984917400280.

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Reflectance spectrum of nanoporous silicon dioxide (SiO2) double layer was calculated by using the matrix method. The results were compared with the corresponding spectrum of silicon oxynitride (SiO[Formula: see text]N[Formula: see text])–porous silicon (PS) double layer which deposited on nanostructured black silicon coatings. The nanoporous silicon dioxide (SiO2) double layer deposited on nanostructure black silicon antireflection coating presents a lower reflectance in a broad range of solar spectrum. This research outcome may find a wide application in solar cell industry.
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Qin, Wenzhen, Frederic Vautard, Per Askeland, Junrong Yu, and Lawrence Drzal. "Modifying the carbon fiber–epoxy matrix interphase with silicon dioxide nanoparticles." RSC Advances 5, no. 4 (2015): 2457–65. http://dx.doi.org/10.1039/c4ra11878b.

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Zhang, Ying Chao. "Fabrication of Stearic Acid/Silicon Dioxide Composite Shape-Stabilized Phase Change Materials for Thermal Energy Storage." Applied Mechanics and Materials 521 (February 2014): 609–12. http://dx.doi.org/10.4028/www.scientific.net/amm.521.609.

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Stearic acid/silicon dioxide composite shape-stabilized phase change materials with different mass fraction of stearic acid have been successfully prepared using sol-gel methods. In such an organic/inorganic composite structure, the stearic acid was used as the filling material that is the latent heat storage phase change material (PCM), and the silicon dioxide acted as the matrix material which prevented the leakage of the melted stearic acid. The structure, morphology, thermal properties, thermal conductivity of the composite PCM were determined by X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Scanning electron microscope (SEM) and Differential scanning calorimetry (DSC). The results show that the form-stable composite PCM has the optimal effect, preventing the leakage of stearic acid from the matrix of silicon dioxide, emerges when the composite containing 50% (mass fraction) stearic acid. The latent heat and melting temperature of the corresponding composite PCM is measured as 85.7J/g and 52.2 °C respectively. Meanwhile, the thermal conductivity of the composite PCM could be improved effectively by using silicon dioxide as a supporting material.
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Timoshenko, V. Yu, D. M. Zhigunov, P. K. Kashkarov, O. A. Shalygina, S. A. Teterukov, R. J. Zhang, M. Zacharias, M. Fujii, and Sh Hayashi. "Photoluminescence properties of erbium-doped structures of silicon nanocrystals in silicon dioxide matrix." Journal of Non-Crystalline Solids 352, no. 9-20 (June 2006): 1192–95. http://dx.doi.org/10.1016/j.jnoncrysol.2005.11.119.

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Hass, Jamie L., Erin M. Garrison, Sarah A. Wicher, Ben Knapp, Nathan Bridges, DN Mcllroy, and Gustavo Arrizabalaga. "Synthetic osteogenic extracellular matrix formed by coated silicon dioxide nanosprings." Journal of Nanobiotechnology 10, no. 1 (2012): 6. http://dx.doi.org/10.1186/1477-3155-10-6.

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Gusev, O. B., A. V. Ershov, D. A. Grachev, B. A. Andreev, and A. N. Yablonskiy. "EFFECT OF SURFACESi--SiDIMERS ON PHOTOLUMINESCENCE OF SILICON NANOCRYSTALS IN THE SILICON DIOXIDE MATRIX." Журнал Экспериментальной и Теоретической Физики 145, no. 5 (2014): 830–37. http://dx.doi.org/10.7868/s0044451014050061.

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Dissertations / Theses on the topic "Silicon dioxide matrix"

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Fedosse, Zornio Clarice. "Ionic liquids as multifuncional additives for poly(methyl methacrylate)-based materials." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI041/document.

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La vaste gamme de combinaisons possibles de cations et anions, ainsi que les excellentes propriétés intrinsèques des liquides ioniques (LIs) peuvent être considérées comme les principaux facteurs qui ont conduit au développement d’une recherche utilisant des LIs comme additifs des matériaux polymère. Ainsi, l'objectif principal de ce travail est d'explorer le rôle de la nature du cation et/ou du anion du LI sur les propriétés des matériaux basées de poly (méthacrylate de méthyle) (PMMA). Dans une première partie, des LIs de type imidazolium et ammonium ont été incorporés au PMMA et des caractérisations morphologiques et structurales ont été effectuées afin de comprendre leur impact sur les propriétés thermiques, viscoélastiques et mécaniques des matériaux résultants. Dans la section suivante, la capacité de ces LIs à base d'imidazolium et d'ammonium en tant qu’agents interfaciaux à la surface de la silice a été évaluée. Sub-micro et nanoparticules de silice, ainsi que les LIs, ont été incorporées dans une matrice de PMMA afin de préparer des composites. L'amélioration des propriétés des matériaux ont été discutées en fonction du degré auquel chaque LI influence la compatibilité entre les particules et la matrice polymère. De plus, ces composites ont été exposés au dioxyde de carbone en état supercritique (scCO2) pour utiliser celui-ci comme agent moussant et ainsi produire des matériaux expansés. Le rôle du LI et des particules de silice pour structurer les matériaux expansés a été analysé. Dans la dernière partie de cette étude, le scCO2 est utilisé comme milieu de réaction pour la modification chimique par greffage de la surface des nanoparticules de silice par des LIs de type imidazolium, contenant également des groupes hydrolysables et différentes chaînes alkyles. Le rôle de la pression et la quantité de LI ajoutées au milieu de réaction, ainsi que la longueur de la chaîne alkyle des LIs se sont avérées essentielles pour contrôler le degré de fonctionnalisation des nanoparticules. Enfin, ces nanoparticules modifiées ont été incorporées dans une matrice PMMA. Des analyses de morphologie ont été utilisées pour évaluer la dispersion des particules dans la matrice et les propriétés physico-chimiques de ces matériaux ont été également étudiées
The large array of cation/anion combinations, and the excellent intrinsic properties of ionic liquids (ILs) open a large range of possibilities in their use as additives to polymer materials. Thus, the main objective of this work is to explore the role of both the cation and anion of a series of ILs on the properties of poly(methyl methacrylate) (PMMA)-based materials. In a first approach, low amounts of imidazolium and ammonium-based ILs were incorporated as additives to PMMA in the molten state. Morphological and structural characterizations were developed in order to understand the impact of the presence of such ILs on the thermal and mechanical properties of the resulting materials. Then, in the following section, the ability of the same imidazolium and ammonium-based ILs as physical modifiers of silica surface was evaluated. In such an approach, ILs were supposed to act as interfacial agents. Sub-micron and nanosize silica particles were used to prepare PMMA composites. Thus, the extents of each IL improve the interfacial interaction between PMMA and silica particles were discussed. In addition, supercritical carbon dioxide (scCO2) was used as foaming agent to produce foamed PMMA-based composites. In such a case, the combined effect of the presence of ILs and silica particles was analyzed regarding the morphology of the foamed structures. In the last section, scCO2 was used as reaction medium, in an environmental friendly approach, to chemically modify silica nanoparticles using a series of imidazolium IL-functionalized silanes (with different alkyl chain lengths). Thermogravimetric analysis (TGA) was used to highlight the effect of the working pressure and the content of such ILs in the reaction medium. The effect of the alkyl chain length on the grafting density of the resulting nanoparticles was also discussed. Finally, novel PMMA-based nanocomposites were prepared by the incorporation of such grafted nanoparticles. Transmission electron microscopy (TEM) and small-angle neutron scattering (SANS) analyses were used to evaluate the state of dispersion of the particles into the polymer matrix. Moreover, the thermal, rheological and mechanical properties of the materials were studied
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Teng, Sheng-Han, and 鄧聖瀚. "Simulations for dopants distribution of boron-doped silicon nanocrystal embedded in amorphous silicon dioxide matrix." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/cx37z3.

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碩士
國立交通大學
電子工程學系 電子研究所
103
The renewable solar energy has increased 40% every year in the past decade, as carbon emission reduction is becoming the common goal for fighting global climate change. Because of abundant materials and mature fabrication techniques, silicon-based solar cells still dominate 90% of the global photovoltaics market nowadays. The third-generation solar cells are being extensively developed in order to reduce the cost per watt. One of such underdeveloped solar cells consists of silicon quantum dots (Si QDs) embedded in a dielectric matrix, which have the Si-based advantages and follow the well-known QD fabrication process. Moreover, the Si QD band gap can be tuned by varying the nanocrystal sizes due to the quantum confinements. That is, the silicon nanocrystals with different sizes can absorb a wide range of solar spectra, and consequently the optical absorption coefficient is enhanced in such a QD design. Besides, one can further add dopants to improve the current transport. In fact, experimentalists have obtained both better carrier transport efficiency and higher open-circuit voltage by doping the Si QD solar cells. This work mainly focuses on two interests. First, experimentalists can roughly distinguish the silicon nanocrystals from its amorphous silicon-dioxide matrix in TEM images, but the atomistic details of their interface still remain unclear. Second, although better efficiency of solar cells is observed by adding dopants, one has no idea how dopants distribute in the solar cells. Both properties are important for further revealing the mechanism of efficiency improvements by quantum dots and dopants. We start by building spherical silicon nanoclusters (diameters 4, 6, 8 nm) embedded in the amorphous silicon dioxide matrix, where each silicon nanocluster contains a crystalline seed (diameter 2 nm) at its center, surrounded by an amorphous shell. We simulate such a structure by molecular dynamics under the experimental annealing temperature 1100 °C. We find that, after annealing simulation, the crystalline core grows, and the outer shell becomes a bilayer of amorphous silicon and silicon-rich oxide. We also dope the silicon nanoclusters (diameter 8 nm) with different numbers of boron atoms. We simulate such a doped system again under the experimental temperature. We find that the boron atoms hardly displace at all in both the crystalline silicon region and the silicon dioxide matrix, but significantly migrate within the bilayer shell of amorphous silicon and silicon-rich oxide. Finally, we have also done some preliminary calculations for preparing future electronic-transport study by the non-equilibrium Green’s function within the framework of density functional theory. In summary, we study the Si QD solar cells by molecular dynamics simulation to understand the microscopic mechanisms of the system. We expect that such understandings will help further improvements of the Si QD-based solar cells, and may eventually have impacts on future solar-energy industry.
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Fangsuwannarak, Thipwan Photovoltaic &amp Renewable Energy Engineering UNSW. "Electronic and optical characterisations of silicon quantum dots and its applications in solar cells." 2007. http://handle.unsw.edu.au/1959.4/44340.

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In this thesis, the structural, optical and electrical properties of crystalline silicon quantum dots (SiQDs) are examined for application to silicon based tandem cells. The approach has been to concentrate on all silicon devices by taking advantage of quantum confinement in low-dimensional Si. RF magnetron co-sputtering provided the capability of creating superlattice structures in conjunction with high temperature annealing, to form Si nanocrystals in an oxide matrix. Structural techniques, including Fourier transform infrared spectroscopy (FTIR), micro-Raman spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), and Secondary ion mass spectroscopy (SIM) were employed to gather structural information about the SiQD/SiO2 SLs. The result combine presents that the packing density of Si QDs, correlated to the oxygen content of the silicon rich oxide layer can be control independently. The effect of Si nanocrystallite density on Raman scattering is investigated. The preliminary results present that a decrease in the oxygen content (x) results in an increased sharpness of the Strokes-mode peak of nanocrystalline Si, attributed to an increase in the proportion of crystalline Si because of the increased number of SiQDs. However the influence of the surface region on the crystallite core intensity scattering becomes dominant, when SiQD size diameter is very small (less than 3 nm). The present work shows that a decrease in x-content leading to an increase of the SiQD concentration, initially results in the enhancement of the lateral conductivity in the SiQD superlattice material. In this work, the Al contacting scheme, using a prolonged heat treatment technique at elevated temperature less than the eutectic point of Al and Si (577C) has been successfully applied to making Ohmic contacts on both SiQD SLs in oxide and nitride matrices. Activation energy (Ea) of SiQDs, extracted from a linear Arrhenius plot is investigated in the present work in order to expand the understanding of engineering electrical injection in laterally active paths. It is found that a lower barrier height of dielectric matrix influences to the lateral electron transport of the SiQDs in such dielectric matrix. PL results confirm that the band gap of surface oxidized SiQDs widens due to quantum confinement. The present results reveal that the strong peak (Q-peak) due to quantum confinement is more effective in the emission with increasing SiQD concentration. The surface oxide is believed to play an important role in the reduction of SiQD luminescence due to a trapped exiciton. It is concluded that SiQDs surface oxide accompanied by a SiO2 matrix may not provide a good passivation in very small SiQD size. However the energy band gap and conductivity of the SiQDs are tunablity, in the optimum range of SiQD size and concentration. This observation may be important for future nanoelectronics applications.
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Book chapters on the topic "Silicon dioxide matrix"

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Tyschenko, I. E., A. B. Talochkin, E. N. Vandyshev, A. G. Cherkov, and Andrzej Misiuk. "The Properties of Hydrostatically Strained Ge and Si Nanocrystals in Silicon Dioxide Matrix." In Solid State Phenomena, 39–44. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/3-908451-13-2.39.

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TURISHCHEV, S. Yu, E. V. PARINOVA, F. KRONAST, R. OVSYANNIKOV, N. V. MALASHCHENOK, E. A. STRELTSOV, D. K. IVANOV, A. V. MAZANIK, and A. K. FEDOTOV. "NICKEL RODS ARRAYS IN A SILICON DIOXIDE MATRIX: A SYNCHROTRON SPECTROMICROSCOPY STUDY." In Physics, Chemistry and Applications of Nanostructures, 115–18. WORLD SCIENTIFIC, 2015. http://dx.doi.org/10.1142/9789814696524_0029.

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Conference papers on the topic "Silicon dioxide matrix"

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Teo, Han Wei, Yun Wang, Zhi Qiang Mo, and Si Ping Zhao. "Time-of-Flight Secondary Ion Mass Spectrometry profiling for arsenic in silicon dioxide matrix." In 2016 IEEE 23rd International Symposium on the Physical and Failure Analysis of Integrated Circuits (IPFA). IEEE, 2016. http://dx.doi.org/10.1109/ipfa.2016.7564258.

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Ankegowda, Naveen, S. A. Mohan Krishna, and B. S. Nithyananda. "Characterization Of Mechanical And Tribological Behaviour Of Aluminium-Silicon Carbide-Titanium Dioxide Hybrid Metal Matrix Composites(MMC)." In Third International Conference on Current Trends in Engineering Science and Technology ICCTEST-2017. Grenze Scientific Society, 2017. http://dx.doi.org/10.21647/icctest/2017/49067.

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Nagarajan, Vijaisri, Valery Ponyavin, Yitung Chen, Milton E. Vernon, Paul Pickard, and Anthony Hechanova. "CFD Modeling of Bayonet Type High Temperature Heat Exchanger and Chemical Decomposer With Different Packed Bed Designs." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42465.

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The present work is concerned with use of bayonet type high temperature heat exchanger as silicon carbide integrated decomposer (SID) which produces sulfuric acid decomposition product - sulfur dioxide. The product can be used within the sulfur iodine thermo-chemical cycle portion of the hydrogen production process. The chemical decomposition occurs in packed bed area of the decomposer. The engineering design of the packed bed is very much influenced by the structure of the packing matrix, which is governed by the shape, dimensions and the loading of the constituent particles. Optimum design of catalyst pellet in terms of shape configuration, packing method and available surface area can promote catalytic activity and the prevailing transport properties of the system. Knowledge of the underlying factors should enable designers to engineer the optimum design for a given system with prescribed conditions. The investigations of fluid flow and the arrangement of cylindrical and spherical pellets in packed bed are presented in the paper.
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Malcolm, Nathan, Alex J. Heltzel, Li Shi, and John R. Howell. "Simulation of Charge Density and Field Distribution of a Gold Nanoparticle Tip-Terminated Scanning Nanowire Waveguide for Molecular Imaging." In ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/ht2009-88351.

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A Finite Difference Time Domain (FDTD) simulation is employed to calculate electromagnetic field and charge density distributions at the junction between a gold nanoparticle (NP) tip of a scanning ZnO nanowire and gold NP bio-markers. This three-dimensional simulation calculates the magnetic and electric field components in a large matrix of Yee cells by solving Maxwell’s curl equations. An absorbing boundary condition is included to eliminate reflection back into the simulation chamber. In the specific simulations considered here, a laser pulse of single wavelength is incident on the backside of a transparent silicon dioxide micro-cantilever, and coupled into a ZnO nanowire grown from an opening on a metal coating of the front side of the cantilever. The simulation results reveal local field enhancement between the gold NP tip of the nanowire and only one of three 20 nm gold NPs with a 28 nm empty spacing between two adjacent NPs. The charge density distributions in the gold tip and the gold NP are calculated and correlated with the local field enhancement, which makes the gold tip of the scanning nanowire waveguide attractive for use in imaging gold NP bio-labels on cell membranes.
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Escobar, Mariano Martin, Adrián Di Paolo, and Analía Vazquez. "Carbon Dioxide Uptake by Concrete Modified With Carbon Nanotube." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-11475.

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CO2 emission from fossil fuel fired power plants contributed 30% of global emissions in 1990. In the same year, the cement industry contributed about 5% of the total. According to Kyoto Protocol, a tremendous effort is required to reduce the carbon dioxide emission. One potential technology in CO2 mitigation responses is the use of concrete products as carbon sink through the early age fast curing. The cement compounds C3S and C2S are instantaneously carbonized into calcium carbonate and silica gel, once cement is mixed with water and exposed to the carbon dioxide gas. The objective of this work is to evaluate the effect of adding carbon nanotubes in cement paste matrix on the capacity as CO2 sink. Adiabatic temperature was determined for different carbon nanotubos content on the cement paste. The microstructure was studied by scanning electronic microscopy. The calcium carbonate and calcium hydroxide content were determined by a thermogravimetric analysis. The storage modulus was measured for the specimens of cement paste before and after the immersion in CO2. Carbon nanotubes act as nuclear agent of the calcium carbonate and increase the maximum temperature and decrease the time of hydration. The incorporation of carbon nanotubes to Portland cement paste could modify the transport properties of the matrix. In fact, it was shown that interfacial interactions between the hydration products and multi-walled carbon nanotubes occur; and it was observed the insertion of multi-walled carbon nanotubes between the hydration products.
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Debliquy, Marc, Antonio Bueno, Christophe Caucheteur, Patrice Megret, Marie-Georges Olivier, Driss Lahem, and Marcel Bouvet. "Nitrogen dioxide sensor based on optical fiber coated with a porous silica matrix incorporating lutetium bisphthalocyanine." In 2013 Seventh International Conference on Sensing Technology (ICST). IEEE, 2013. http://dx.doi.org/10.1109/icsenst.2013.6727734.

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Lo, Yu-Lung, and Chen-Shane Chu. "Highly sensitive and linear optical fiber carbon dioxide sensor based on sol-gel matrix doped with silica particles and HPTS." In 20th International Conference on Optical Fibre Sensors, edited by Julian D. C. Jones. SPIE, 2009. http://dx.doi.org/10.1117/12.833521.

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Reports on the topic "Silicon dioxide matrix"

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Babic, Davorin, Raphael Tsu, and Richard F. Greene. Ground-State Energies of One- and Two-Electron Silicon Dots in an Amorphous Silicon Dioxide Matrix. Fort Belvoir, VA: Defense Technical Information Center, June 1992. http://dx.doi.org/10.21236/ada271027.

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