COLL 444 |
| Christina A. Hacker1, Kelly A. Anderson2, Lee J. Richter3, and Curt A. Richter1. (1) Semiconductor Electronics Division, National Institute of Standards and Technology, 100 Bureau Drive, Mail stop 8121, Gaithersburg, MD 20899, (2) Department of Chemical Enginnering, University of Maryland, College Park, MD 20742, (3) Surface and Microanalysis Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 |
| Organic-modified semiconductor surfaces are of increasing interest from a molecular electronic standpoint since the electrical properties of the substrate can be tailored by altering the dopant identity and concentration. Organic monolayers tethered to the Si(111) surface through a Si-O-C bond were prepared by reacting the hydrogen-terminated substrate with dilute solutions of primary alcohols and aldehydes with ultraviolet light activation. The reaction conditions were systematically adjusted to yield optimal alcohol and aldehyde monolayers from ultraviolet irradiation of dilute solutions. Because electrical properties are related to the structure of the films, physical and chemical properties of the organic monolayers were characterized with infrared spectroscopy, variable angle spectroscopic ellipsometry, and contact angle measurements. Finally, current-voltage and capacitance-voltage measurements were obtained from silicon-organic-metal test structures in order to understand the effect of differing molecular interfaces on electronic properties. |
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Nanoscience and Nanotechnology
2:00 PM-5:15 PM, Wednesday, March 31, 2004 Marriott -- Orange County 5, Oral
Division of Colloid and Surface Chemistry |