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 30 for “"Drop-Casting"”.
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Corrosion and Wear of Graphene-PMMA Nanocomposite Coatings Made by Drop-Casting
… on the surfaces of 6061Al alloy using a dropcasting method. The incorporation of 1 wt. % GNP increased the tensile strength of PMMA from 33 MPa to 49 MPa. Further increase of GNP to 3 and 5 wt. % reduced the tensile strength to 43 and 36 MPa, respectively. The composites with 1, 3, and 5 …
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Functionalization and fabrication of single-walled carbon nanotube-based chemiresistors for sensory applications
… carbon-based sensors by printing, dip coating, drop casting, or drawing has advantages of being simple and low-cost without the need for highly specialized facilities. We have investigated the fabrication of sensors both by drop casting and drawing. Single-walled carbon nanotubes (SWCNT) …
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Dye-doped polymer nanoparticles for flexible, bulk luminescent solar concentrators
… the PVA waveguide upon water evaporation during drop casting.
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Conducting polymer actuator enhancement through microstructuring
… form on the surface of polymer films during the drop casting process if moist air was blown over the top of the film. This technique has been used to generate 0.8-5 /m holes on the surface of poly(3-hexylthiophene) films. It can also be used to create columns 3 to 10 /tm in height in polypyrrole. …
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DNA nanotechnology for light-emitting plasmonic applications
… cavities in a bottom-up fashion by simply drop casting gold nanoparticles on thin gold films. The existence of tightly confined optical modes enhances both electronic and vibrational transitions of the molecules present in the gap. To accurately position single molecules within these …
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Synthesis and Fabrication of Alpha Phase Iron Oxide (α-Fe2O3) Nanostructured doped with Ruthenium for Highly Sensitive and Selective Flammable and Toxic Gas Sensor
… The sensors were fabricated by using the drop casting method, and the sensors were tested for gas sensing performance at 225 ⁰C operating temperature, towards liquefied petroleum gas (LPG), ethanol, propanol, ammonium (NH3), and hydrogen sulphide (H2S). The pure sample alpha iron oxide (α …
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Palladium (pd) decorated zinc oxide (ZnO) nanoparticles for gas sensing applications: meat spoilage gases
… A gas sensor was fabricated through the drop casting method on a gold grid. These gas sensor samples were exposed to both reducing and oxidizing gases. Sensing was performed at a temperature from 25°C to 225°C. The best result was obtained at 150°C using 0.2%Pd-ZnO sensor for NO2 gas …
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Electronic and Plasmonic Properties of Nano-Sized Gold/Strontium Titanate Interface
… current enhancement. A combination of drop-casting and high temperature annealing enables orientation control over nano-sized metal/oxide interfaces. To examine the electronic properties, individual Au nanoparticle/SrTiO3 interfaces with sizes ranging from 20 to 150 nm are characterized …
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Study of the Valence Tautomer Complex [Co(sq)(cat)(3-tpp)2] for Applications in Molecular Spintronics
… VT molecules were prepared from solution via a drop-casting approach. For thin film analysis, we have developed a custom made, fully automated Vibrating Sample Magnetometer (VSM) with a sensitivity on the order of 1 × 10-5 emu, as well as a fully automated, variable temperature, under vacuum …
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Nanoscale device engineering and plasmon-enhanced light – matter interactions for the characterization of 2D materials
… the thesis presents a technique involving the drop-casting of gold nanoparticles onto 2D materials placed on gold substrates. Electrical contact is established by positioning an optically transparent and electrically conductive cantilever on a single nanoparticle. It is used to unveil …
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Screen-printed ion selective electrodes for soil ion detection
… fabricated by a combined screen printing and drop casting process, and the protocol, extraction solution, and reference potential stability were tuned to maximize ISE performance and repeatability. Using a mathematical model and supporting experiments, we verified that hydrogen selectivity …
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Development and characterization of conducting polymer actuators
… polymers using layer by layer deposition and drop casting methods have been explored. These new composite materials and techniques significantly reduce creep, improve conductivity and increase stiffness of the polymer actuators.
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Design and Development of Sustainable, Low-Cost, High-Performance Nanomaterials for Thermoelectric and Solar Hydrogen Applications
… including electrochemical deposition, SILAR and drop-casting. Nanostructuring, doping and deposition on fluorine doped tin oxide substrates were employed to partially decouple charge transport pathways, enabling enhanced Seebeck coefficients, reduce thermal conductivity while maintaining …
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The Electrochemical Characterisation of Carbon-based Nanomaterials and their Application in the Detection of Heavy Metal Ions
… pencil style electrodes which were modified via drop-casting. Both carbon nanomaterials were used in their pristine form, simply cast from a DMF suspension. It was found that the electrode modified with sonicated MWCNTs possessed a greater electroactive surface area (0.377 cm2) and larger rate …
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Polymer based microscale and nanoscale technologies for optical and biomedical application
… to PDMS mold and from PDMS mold to PLLA film by drop casting process. The surface characteristics of the nano-patterned film changed drastically form hydrophilic to hydrophobic due to patterning. We also investigate the drug coating process in this film for its use in controlled drug release …
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Development of Electrochemical Sensors Suitable for In Vivo Detection for Neurotransmitters
… neurochemicals, showed that commonly used drop-casting techniques deposit nanoparticles non-uniformly. More reproducible modification methods are needed. The work in this dissertation demonstrates the capabilities of redox cycling for multi-neurotransmitter analysis and sets the foundation …
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1, 2, and 3 Dimension Carbon/Silicon Carbon Nitride Ceramic Composites
… at 623°C. 2-D carbon/SiCN films were produced by drop-casting a mixture of PAN/cyclosilazane onto a glass slide followed by pyrolysis of the film. Samples ranging from 10:1 to 1:10 PAN:cyclosilazane were made by dissolving the solutes into DMF to produce solutions ranging from 1% to 12% by weight. …
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Reduced graphene oxide nanoparticle hybrids and their assembly for lithium-ion battery anodes
… the low packing density of nanomaterials. A drop-casting method was used to align rGO-sodium titanate nanorods through evaporation driven self-assembly (Chapter 3) which relies on a combination of electrostatic repulsive forces originating from the rGO coating, and liquid crystal phase …
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Molekulių įspaudų technologijos taikymas melamino jutikliuose /
… Au NPs into the polymerization solution, Au NPs drop-casting and electrochemical coating of the nanostructures, chronoamperometric synthesis of the nanostructures and coating from a solution of 5 mM HAuCl4 and 0.1 M KNO3 was found to be the most suitable for the system, with the following …
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Quantum dot polymer composite materials for light management in optoelectronic devices
… via different methods, including spin-coating, drop casting and electrohydrodynamic jet printing. The polymer surface has been incorporated with nano-sized features to create photonic crystal structure. Up to 8 times QD excitation and emission enhancement have been demonstrated. We have also …
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