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 22 for “"surface cleaning"”.
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Surface cleaning of optics by plasma (scope) with atomic hydrogen
… optics and lower the cost of ownership. Most cleaning processes investigated thus far have had trouble with selectivity; they require highly reactive gases that will degrade the optics in the removal process. In addition, the current cleaning gases have low transmission for the EUV light, …
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Analysis of rbd palm olein abrasive blasting as new metal surface cleaning method
Abrasive blasting is a process done for surface cleaning which has two methods which are dry or wet process. The dry process which uses abrasive media blasted onto a surface to clean dirt on the surface normally will release fine dust into the environment. Water is used with abrasive media to …
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Wafer surface cleaning for silicon homoepitaxy with and without ECR hydrogen plasma exposure
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.
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Effects of feeder surface cleaning on <i>Mycoplasma gallisepticum</i> transmission in House Finches
… several proposed methods to limit this spread. Cleaning bird feeders is one commonly recommended practice. It is important to test whether recommended cleaning methods actually work to prevent spread, and to test simple cleaning methods that people could do frequently at their own feeders. This …
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IN SITU PLASMA REMOVAL OF SURFACE CONTAMINANTS FROM ION TRAP ELECTRODES
… an in situ plasma discharge designed to remove surface contaminants from electrodes in an ion trapping experimental system is presented with results. In recent years, many advances have been made in using ion traps for quantum information processing. All of the criteria defined by DiVincenzo for …
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Geometry optimization of dry ice blasting nozzle for the noise reduction using experimental validation
Dry ice blasting provides many advantages to surface cleaning in which the blasting medium sublimate during the surface impact will not leave a secondary contamination. However, on the negative side of dry ice blasting (DIB), it produces a high noise exposure. The noise exposure during a high …
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Metal oxide heterostructured films with controlled architecture for enhanced photocatalytic properties
… For this purpose, we have investigated the surface and interfacial properties of semiconductor/semiconductor (p-n type, NiO/ZnO) and metal/semiconductor (metal/n- type, RuO2/ZnO) heterostructures using systematic (step-by-step) interface studies, in order to gain knowledge regarding the …
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Atmospheric pressure plasma chemical deposition by using dielectric barrier discharge system
… in various practical applications such as surface cleaning, modification and sterilization. Lately thin film deposition and etching applications of atmospheric plasmas are being extensively investigated. For efficient film deposition process, a high frequency power source and an additional …
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Risk factors for work-related asthma in health workers with exposure to diverse cleaning agents in two African health care settings
… exposed to a wide range of chemicals used for cleaning and disinfection. This has been largely attributed to the ever-increasing demand for effective cleaning and disinfection in hospital settings in an effort to prevent healthcare associated infections. Over the last two decades, there has …
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Sources of noise in niobium-based superconducting quantum circuits
… junctions. Finally, I studied the effect of surface cleaning after fabrication for resonators and transmons. Microscopy shows that an oxygen ash and BOE dip together removes all photoresist residue from the chip. Internal-Q measurements do not show a marked improvement due to this cleaning, …
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Influencing contact-line behavior in dynamic wetting through thermocapillarity and surface topography
… fluid displacing a receding fluid on a solid surface. This phenomenon can be seen in day-to-day occurrences such as water droplets sliding on a glass window on a rainy day, where the droplet displaces the air surrounding the glass surface as it slides, and in industrial processes such as …
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Discovery of mechanisms and methods for surface-based defect engineering in oxide semiconductors using liquid water
… Ion implantation has several drawbacks such as surface damage, dislocation formation, and channeling, due to implantation effects. However, the diffusion and exchange process are less expensive and do not damage the surface. This thesis focuses on elucidating thermodynamic and kinetic processes …
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Design principles for high performance, low environmental impact silicon cleans
… precise control of impurities on the silicon surface. Cleaning of silicon wafers has historically involved the use of concentrated chemicals, large amounts of rinse water, and elevated temperatures to remove particles, metals, and organic matter from the surface. Poor understanding of the …
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Metal-aluminium gallium nitride Schottky contacts formation.
… been used to investigate the effect of various surface cleaning procedures on Al[x]Ga[1]-[x]N surfaces for x = 0.20 and 0.30. Results show that wet chemical etch in a HF solution followed by a 600°C in-situ annealing under ultra-high vacuum (UHV) is very effective in removing oxygen from the …
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Innovative Deposition of Corrosion Inhibitors by Abrasive Blasting
… blasting of steel using garnet is a commercial surface cleaning procedure, for removing old corrosion scales and paint prior to the application of new coatings. A certain percentage of the garnet and its impurities remain attached, partially covering the steel. Between cleaning and repainting, …
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Atomically precise single Graphene Nanoribbon transistor
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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Removal of organic contaminants from lithographic materials
… organic contamination on the mask. Traditional cleaning methods employ the use of wet chemicals to etch contamination off of a surface, however this is limited in the sub-micron range of contaminant particles due to lack of transport of sufficient liquid chemical to the surface in order to …
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Process-Induced Degradation during the Integration of Pb(Zr/x Ti/1-x)O3 Ferroelectric Capacitors
… elimination of this damaged layer, a novel wet cleaning solution was designed. Scanning electron microscopy (SEM) pictures clearly show that treatment with the cleaning solution completely removed the etching damaged layer. With the cleaning solution, a sidewall cleaning process and a surface …
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Understanding COVID-Induced Public Health Practices and Protocols and Workplace Challenges: The Experiences of Child Care Professionals in Canada
… health and safety. Fomite-based PHPPs, including surface cleaning (99.7%), handwashing with soap (97.4%), and using sanitizer (96.0%), were more commonly reported than airborne-based PHPPs such as masking (93.0%), opening windows (55.9%), using an HVAC system (19.8%). A quarter of CCPs reported …
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