Global ETD Search
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 20 of 37 for “"Organic-inorganic hybrid"”.
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UV-curable organic-inorganic hybrid polyurethane coating
<p>This thesis explored a series of organic-inorganic hybrid polyurethane oligomers with varying molecular weights and functional groups (acrylate and/or silane) that were cured with a single ultraviolet (UV) trigger but two photo-initiators. Upon UV irradiation, the free-radical initiator …
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Organic-inorganic hybrid materials: new functionalised polyoxotungstates
… functionalisation via covalent grafting of organic groups onto the polyoxometalate clusters is less investigated and provides a method of fine tuning the properties of these materials towards desired applications. Polyoxotungstates (polyoxometalates with tungsten as the metal) are …
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Device Physics of Organic-Inorganic Hybrid Perovskite Semiconductors
… is mitigated by modifying the electrode with organic interlayers, leading to the demonstration of single crystal perovskite transistors with the highest reported mobilities of up to 15cm²/Vs at low temperatures. Subsequently, the research tackles challenges related to low mobility, high trap …
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Design, Fabrication and Applications of Organic-Inorganic Hybrid Systems
… way to the fabrication of nano to micro scale organic-inorganic hybrid particles was demonstrated. A well known “template-assisted approach” was chosen for the preparation of these hybrid particles, in which the inorganic material of interest is templated against the template particles. A …
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Organic-inorganic hybrid materials for arsenic adsorption : surface complexation and intraparticle diffusion
… arsenic adsorbents that have been developed, organic-inorganic hybrid materials are promising candidates due to the merits of their high arsenic affinity of the selected inorganic portion and high designability and moldability of the organic portion. Currently, the most successful …
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Synthesis and surface modification of nanorods for investigation into organic-inorganic hybrid materials
… towards the synthesis of a new kind of giant hybrid liquid crystal consisting of organic semiconductor molecules surrounding an inorganic semiconductor with a nanorod shape with the potential for use in photovoltaic solar cells. It is intended that such materials will combine the good …
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Novel chiral liquid crystal organic-inorganic hybrid nanoparticle systems : Design, synthesis and investigation
A first step is taken towards the validation of organic synthesis techniques. Small molecular organic compounds were prepared as intermediates for the liquid crystal materials which exhibit room temperature cholesteric mesophases. These cholesterol based materials were then attached to …
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Studies of Conjugated Small Molecules, Polymers and Organic-Inorganic Hybrid Materials for Photovoltaic Applications
… namely polyoxometalate (POM)-containing organic-inorganic hybrids, near-IR absorbing conjugated polymers and discotic polycyclic aromatic hydrocarbons. POM-containing organic-inorganic hybrids are interesting because of the potential roles, such as electron acceptors and electron …
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New Organic/inorganic Hybrid Sol-gel Nanocomposite Materials For Raman Gain In Fiber Optics
… the synthesis and characterization of new hybrid inorganic/organic sol-gels and monomers capable of producing broad wavelength Raman scattering over a spectral range of 1200-1670 nm are presented. The synthetic methodology developed facilitates the systematic approach to produce sol-gel …
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Investigation of Instability of a Single Crystal Organic –Inorganic Hybrid Perovskites Used for Photovoltaic Solar Application.
… of efficient and reliable materials. Halide hybrid perovskites as a single crystal have been shown to efficient materials for photonic applications which include photovoltaic devices and photodetectors. However, the research lacks understanding of stability mechanisms of these materials under …
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Design of high-performance luminescent solar concentrators based on aggregation-induced emitters in organic-inorganic hybrid waveguides
… in waveguides that are made using a family organic-inorganic hybrid materials, also known as ureasils to fabricate LSCs with improved efficiencies. In Chapter 3, the first part of this work, a green-emitting conjugated polymer (CP) with AIE characteristics was used in a di-branched ureasil …
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Optical and structural characterization of metal oxides and carbon nitride compounds for the development of organic/inorganic hybrid systems
… Other limitations can be overcome by creating hybrid materials, such as organic and inorganic systems. In such scenario, it is necessary a detailed study aimed to characterize the properties of organic material and the means of implementation of the hybrid system. In the first part of the …
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Nanostructured Materials Prepared With Ultrasound
… has proven to be an excellent method to produce organic-inorganic hybrid materials. Nanoporous silica spheres incorporated with various organic dyes are synthesized by USP and utilized in colorimetric sensing arrays for the identification of aliphatic amines. Further usefulness of USP is …
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Development of low-temperature solution-processed colloidal quantum dot-based solar cells
Solution-processed solar cells incorporating organic semiconductors and inorganic colloidal quantum dots (QDs) are potential alternatives to conventional solar cells fabricated via vacuum or high-temperature sintering processes for large-area, high-throughput, and low-cost manufacturing. In this …
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Molecular Crystallization Directed By Nanoparticles And Nanopatterns
… We propose a universal strategy to synthesize organic/inorganic hybrid nanostructures using inorganic nanoparticles and nanoparticle arrays to induce organic crystalline compound nucleation and crystallization. The nanoconfinement effect will be addressed to study molecular crystallization by …
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Porous Graded Materials Derived From Block Copolymer Self-Assembly For Water And Energy Applications
… can be formed. For example, an inexpensive small organic additive glycerol was successfully incorporated in membrane fabrication at various amounts. These CNIPS polymeric membranes have wide tunable pore sizes and provide a pathway to expand from ultrafiltraion towards nanofiltraion applications. …
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Rational design of hybrid organic solar cells
… present a novel design for a nano-structured organic-inorganic hybrid photovoltaic material that will address current challenges in bulk heterojunction (BHJ) organic-based solar cell materials. Utilizing first principles Density Functional Theory (DFT), we show that layered inorganic …
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Polymer Nanocomposites: Polymer And Particle Dynamics And Its Application As Lubricant
… polymer nanocomposites (PNC) entitled 'Nanoscale Organic-Inorganic Hybrid Lubricants'. Understanding nanoscale dynamics of polymer and particle upon mixing will be a useful guide to improve its application. Polymer Nanocomposites: Polymer and Particle Dynamics - Polymer nanocomposites containing …
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Hybrid light emitting diodes based on solution processed polymers, colloidal quantum dots, and colloidal metal nanoparticles
… quantum dot, and polymer/silver nanoparticle hybrid materials. Solution based materials and organic/inorganic hybrid light emitting diodes attracted significant interest recently due to many of their advantages over conventional light emitting diodes (LEDs) including low fabrication cost, …
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