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 46 for “"Screen printing"”.
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Preparation of catalyst coated membranes using screen printing
… procedure was implemented using a newly acquired screen printer. In this procedure, catalyst ink is forced through a mesh onto a substrate, where it can then be transferred to a membrane via decal transfer to form a CCM. Two gas diffusions layers can then be placed on either side of the CCM …
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The rheology of silicon nanoparticle inks fro screen printing electronic devices
… nanoparticle based inks that are used in the screen printing of electronic devices. The inks were characterized for linear viscoelastic behaviour, flow behaviour, change in properties with angular frequency, as well as thixotropic behaviour. All showed shear thinning, with the more dilute inks …
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Motivations That Underpin Environmental Response In Business: The Case of the Screen-Printing Sector
… the motivations that undeipin the response by screen-printing firms to environmental pressures. The findings suggest that environmental legislation is a significant factor in instigating the initial response by firms that undertake environmental action. Those firms, however, that develop a more …
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A Survey Measuring the Impact of a Silk-Screen Printing Art Therapy Session on Psychological Aspects in Mothers of Children with Cancer: A Pilot Study in Riyadh, Saudi Arabia
… pilot study was to explore the impact of silk-screen printing as an art therapy intervention on psychological aspects in Saudi family caregivers of children with cancer. The sample population was mothers (<em>n </em>= 30) from different regions of Saudi Arabia. This quasi-experimental study was …
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Performance assessment of Au SERS substrates prepared by deposition of Au nanoparticles on screen-printed SiO2 particle films
… technique for simple and rapid trace analysis. Screen-printing, a low-cost fabrication method, has been proposed as a reproducible and affordable approach for the preparation of 3D SERS-active substrates. In this work, a new solution-based film fabrication method is proposed for the preparation …
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2d Material Inks for Printed Electronics
Functional printing is a tried and tested method of low-cost and high-throughput production. Combining 2d materials with printing is an emerging, cost-effective and large-scale fabrication strategy of their devices. However, successful scale-up and adoption of printing as an ubiquitous fabrication …
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Structural and electrical characteristics of printed metal nanoparticle networks
… were fabricated onto paper using the method of screen printing. The metal-binder ratios were varied in order to observe changes in the microstructure when a percolating network consisting of the metal NPs is formed through the layer.
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Realizzazione di riporti funzionalizzanti su superfici ceramiche per la produzione di energia elettrica mediante effetto fotovoltaico
… selected. Among the technical application, the screen printing was used. This technique, widely used in ceramics, has many application areas, including the electronics and photovoltaic industries. It is an inexpensive technique, easy to use in industrial production lines. The screen printing …
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Development of a reusuable atomic oxygen sensor using oxide thick films
… manufactured using a thick film technique of screen printing over a substrate (alumina) that is inert to the action of AO; some of sensors were developed with pure ZnO while others used a binder to the substrate. The expectation has been that impinging atomic oxygen is captured upon the zinc …
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Production and characterisation of nanoparticulate silicon photovoltaic devices
… silicon solar cells, by using low cost screen printing on paper substrates, has been developed. The semiconductor materials used consisted of n- and p-type silicon nanoparticles produced by means of high energy mechanical milling, as well as commercially sourced nanophase intrinsic …
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Computer Aided Design and Fabrication of Magnetic Composite Multilayer Inductors
… devices were constructed using thick film screen printing techniques and characterized to validate the models and to determine the effectiveness of the design modifications. Quantitative comparisons were made between inductors of single permeability cores with inductors produced with …
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Design and Fabrication Techniques of Devices for Embedded Power Active Contact Lens
… fabrication techniques (microfabrication and screen printing) that were employed to make the devices are compared to determine the favorable process for each part of the system.</p>
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Assessing the tensile and fatigue behavior of aerosol jet printed nano silver particle traces on polyimide substrates
… hybrid electronics. Aerosol jet, inkjet or screen printing offer various advantages and disadvantages compared to electroplating, but the behavior of printed metal traces under various types of loading is very different and not yet well understood. This thesis presents an assessment of the …
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A control system for laser trimming thick film resistors and the reliability effects
… the order of ±10% due to the variability of the screen printing process associated with film curing conditions. The methods that have arisen from this need encompass a variety of technologies and techniques. The usefulness of each method is based on its operation, flexibility, repeatability, and …
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Novel Electrochemical Methods for Acidity Monitoring: Theory, Design and Application
… electrochemical sensors and the application of screen-printing technology in sensor fabrication are highlighted. Chapter 2 introduces the screen-printing technology and the fundamental methods of numerical simulation. In addition, reagents, equipment and software packages used in the thesis are …
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Planar copper containing anode-supported solid oxide fuel cells
… tape casting, the cathode being added by screen printing. A 5 mol% of Lithium oxide addition allowed reducing the Gadolinia-Doped Ceria (GDC)-based electrolyte sintering temperature below the copper oxide melting point. IT-SOFCs sintered at 950°C revealed a power density peak of 26 mW cm-2 …
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Bio-engineered gas diffusion electrodes (GDEs) for proton exchange membrane fuel cells (PEMFCs)
… bio-catalysts in traditional GDE fabrication via screen printing. Although biofilms were found to produce layers containing active PGM particles, the films proved to be nonconductive. As such, it was concluded that although biofilms provide huge potential in the recovery and subsequent use of PGM …
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DEVELOPMENT OF A NANOCOMPOSITE SENSOR AND ELECTRONIC SYSTEM FOR MONITORING OF LOCOMOTION OF A SOFT EARTHWORM ROBOT
… with obstacles. A scalable, costeffective, screen-printing method manufactures an array of strain sensors that are conductive and stretchable over 100% with a gauge factor over 38. An array of stretchable nanomembrane interconnectors enables a reliable connection between soft strain sensors …
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Electronic properties and microstructure of nanoparticulate silicon systems for diode applications
… nanoparticles allows more than the simple printing of conductive materials. It gives the possibility of fabricating robust and inexpensive, active components. This work presents the design, fabrication, and characterization of Schottky barrier diodes using silicon nanoparticulate …
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Determining Optimal Halftone Angles for CMYK Printing
… printed materials especially in low-resolution printing such as relief and screen printing techniques. This research investigates optimal halftone angles under low-resolution. The algorithm for this system generates low-resolution images from an input image, aiming to cover the full range of …
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