Study of adsorption of biological and nanoparticle solutions at the solid-liquid interface
dc.contributor.author | Frost, Daniel Wayne | |
dc.date.accessioned | 2007-11-07T17:08:58Z | |
dc.date.available | 2007-11-07T17:08:58Z | |
dc.date.graduationmonth | December | en |
dc.date.issued | 2007-11-07T17:08:58Z | |
dc.date.published | 2007 | en |
dc.description.abstract | With advances in micromechanical machining and nanotechnology, the sample volume needed for biological research and other analysis decreases. With small volume, sample-surface interactions including adsorption must be considered. These adsorption effects can be observed by analyzing light reflected from the solid-liquid interface, and the contact angle of a solution on the surface. Presented is the design and construction of an ellipsometer, a device used to analyze light reflected off of a solid-liquid interface to find interfacial properties, including thickness of a thin film formed by adsorption. The taq enzyme is shown to have a large change in contact angle from seventy degrees to about ten degrees over a short (ten minute) time period when placed on an SU-8 substrate, indicating a change in energy at the interface and a large amount of adsorption. Silane substrates are found to produce similar results. Ellipticity of a colloidal gold nanoparticle solution on a glass substrate is also observed, whose results are difficult to interpret due to bulk shifts in the sample. With the ellipsometer running correctly, it can be used for a number of experiments, including spectroscopic ellipsometry and Brewster angle microscopy, with some modifications. | en |
dc.description.advisor | Bruce M. Law | en |
dc.description.degree | Master of Science | en |
dc.description.department | Department of Physics | en |
dc.description.level | Masters | en |
dc.description.sponsorship | National Science Foundation | en |
dc.identifier.uri | http://hdl.handle.net/2097/411 | |
dc.language.iso | en_US | en |
dc.publisher | Kansas State University | en |
dc.subject | Ellipsometry | en |
dc.subject | Adsorption | en |
dc.subject | Contact angle | en |
dc.subject.umi | Physics, Condensed Matter (0611) | en |
dc.title | Study of adsorption of biological and nanoparticle solutions at the solid-liquid interface | en |
dc.type | Report | en |