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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"semiconductor nanoparticles"”.
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Studies on semiconductor nanoparticles and polymer nanocomposites
Synthesis of nanometer-sized semiconductor materials using various synthetic methods has been an area of intense activity over the past decade. The emphasis has been mainly on the synthesis of semiconductor particles belonging to II-VI and III-V groups. These particles exhibit an increase in their …
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Synthesis of organically capped and water soluble metal sulfide semiconductor nanoparticles
… organically and water soluble metal sulfide nanoparticles have been successfully synthesized using a hybrid solution based high temperature colloidal route in the presence of organic surfactants as both stabilizers and crystal growth modifiers. The structure and morphology of the as-prepared …
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Laser Vaporization Methods for the Synthesis of Metal and Semiconductor Nanoparticles; Graphene, Doped Graphene and Nanoparticles Supported on Graphene
… methods for the synthesis of metal and semiconductor nanoparticles, graphene, B- and N-doped graphene, and metal and semiconductor nanoparticles supported on graphene. These methods include the Laser Vaporization Controlled Condensation (LVCC) approach, which has been used in this work …
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Räumlich definierte Homo- und Blockcopolymer Nanokomposite
… By carefully controlling the position of the nanoparticles within the composites an ideal charge transport can be achieved. For this application the semiconductor nanoparticles can be coated with a conductive polymer. First experiments with poly-3-hexyl-thiophene coated semiconductor …
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Immobilization of Inorganic Nanoparticles on Responsive Polymer Brushes
… direct and controlled immobilization of metal/semiconductor nanoparticles on macroscopic surfaces has been demonstrated. The employed approach offers the possibility of the organization of a variety of inorganic nanoparticles by irreversible bonding and homogenous distribution on an underlying …
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Forster Resonance Energy Transfer in materials used in Luminescent Solar Concentrators
… between the absorption and emission profiles. Semiconductor nanoparticles have little or no spectral overlap but suffer from low quantum yields. Organic donor-acceptor chromophores have been suggested to solve this problem. The donor part of the molecule absorbs the sun’s radiation and …
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Synthesis and characterization of electronic materials for photovoltaic applications
… points for direct growth of size-controllable semiconductor nanoparticles within the polymer film leading to direct electronic communication between the two materials. The synthesis of CdS, CdSe, Ga₂S₃, CuInS₂, CuInSe₂, CuGaS₂, CuGaSe₂, CuGa[subscript x]In[subscript x]-₁S₂, and CuGa[subscript …
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Development and Application of Explicitly Correlated Wave Function Based Methods for the Investigation of Optical Properties of Semiconductor Nanomaterials
<p>Semiconductor nanoparticles, or quantum dots (QDs), are well known to have very unique optical and electronic properties. These properties can be controlled and tailored as a function of several influential factors, including but not limited to the particle size and shape, effect of composition …
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Development and Application of Effective Stochastic Potential Method for Investigating Temperature-dependent Electronic Properties of Nanomaterials
… the ESP method on various systems, including semiconductor nanoparticles to efficiently obtain temperature-dependent distributions of HOMO-LUMO gap energies, excitation energies, and exciton binding energies comprised of a million samples. For many of the systems studied, calculation of these …
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Synthesis of Cadmium, Lead and Iron Sulfide Thin Films and Nanoparticles
The usefulness and application of semiconductor nanomaterials continue to expand the frontier of research in bringing their benefits via technological applications. Several synthetic methods for the preparation of semiconductor nanoparticles have been established. The design and development of a …
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Energetics and Dynamics in Quantum Confined Semiconductor Nanostructures
<p>The ability to tune the band-gap energies of semiconductor quantum dots, nanoplatelets, and quantum wires, their significant absorption cross sections, and high photoluminescence quantum yields make these nanostructures promising moieties for use in optoelectronic devices, solar concentrators, …
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Template-Controlled Synthesis of Magnetic/Semiconducting Nanoparticles within Amphiphilic Core-Shell Cylindrical Polymer Brushes
… templates for the synthesis of inorganic nanoparticles, because the carboxylic acid groups (or carboxylate groups, after neutralization) in the polymer core can coordinate with various metal ions. The hydrophilic core of polymer brushes, poly(acrylic acid), was neutralized by NaOH and …
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One-dimensional hybrid nanomaterials based on cylindrical polymer brushes
… and nanoreactors for the fabrication of CdSe semiconductor nanowires, due to the coordination ability of PAA with Cd2+ ions. Since the chemical structure of the PAA core was resumed, a double-loading process was carried out to load more CdSe nanoparticles into the CPB. AFM, TEM and UV-Vis …
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Nonaqueous Synthesis of Metal Oxide Nanoparticles and Their Surface Coating
… interesting crystalline metal oxide nanoparticles via high temperature nonaqueous solution processes and the formation of core-shell structure metal oxide composites using some of these nanoparticles as the core with silica, titania or polymer as shell via a modified microemulsion …
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Continuous flow platforms for the synthesis of high-quality semiconductor nanocrystals
Semiconductor nanocrystals are of great interest due to their unique optical and electronic properties that are intermediate between bulk semiconductors and molecules. These nanoparticles find use in various applications ranging from electronics (light emitting diodes, photovoltaics) to …
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Non-metallic nanostructures for light-driven chemistry and catalysis
Since ancient times, nanoparticles have been part of human technology, even if people did not consciously recognize their existence. For example, the Lycurgus Cup and stained-glass windows in churches demonstrate early uses of nanomaterials to reflect and manipulate light for aesthetic purposes. …