CHED 304 |
| Research was performed on the coating of silicon wafers with biologically active molecules. The wafers were cleaned and a hydroxyl layer was formed on the surface using UV/ozone and adsorbed water. The wafer was then reacted with ammonium fluoride to form a hydrogen layer on the surface. A vacuum system was designed and built to react the wafers with chlorine at 5 mTorr of pressure. The chlorinated surface was then exposed to polyethylene glycols (PEGs) with varying chain lengths. These formed well-ordered structures on the surface. The PEG was then activated by way of phosphonate termination. The surfaces were characterized by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and ellipsometry. |
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Undergraduate Research Poster Session: Nanotechnology
11:00 AM-1:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster
Division of Chemical Education |