COLL 278 |
| Sathyajith Ravindran, Department of Chemical and Environmental Engineering, University of California, B-136 Bourns Hall, University of California, Riverside, Riverside, CA 92521, Chris Tsai, Department of Electrical Engineering, University of California, University of California, Riverside, Riverside, CA 92521, Orkun Kilic, Department of Mechanical Engineering, University of California, University of California, Riverside, Riverside, CA 92521, and Cengiz S. Ozkan, Electrical and Chemical Engineering, Biomaterials and Nanotechnology Laboratory, Center for Nanoscience Innovation for Defense, University of California, Riverside, CA CA 92521. |
| Conventional device fabrication strategies must be augmented by new techniques including self assembly methods in order to truly take advantage of the quantum nature of novel nanoscale electronic devices and systems and permit the use of these properties for "real" applications in a larger system (> 10 nm and < 1 µm). In paper, we will describe a novel technique for the fabrication of nano-assemblies of carbon nanotubes (CNT) and quantum dots (QD) -formation of CNT-QD conjugates-. Heterojunctions of QD's and MWCNT's could become better alternatives for the synthesis of nanoscale devices which would preserve the electronic properties of MWCNT's compared to configurations that depend on the bending or overlapping of CNT's. Such configurations could be useful for the bottom-up assembly of nanoscale circuits or as drop-in technologies for the existing device platforms. During processing, CNT's are primarily functionalized with carboxylic end groups by oxidation in concentrated sulfuric acid. Thiol stabilized QD's in aqueous solution with amino end groups were conjugated to carbon nanotubes using the ethylene carbodiimide coupling reaction. Detailed chemical and physical characterization of the heterojunctions have been conducted using Fourier transform infrared spectroscopy, transmission electron microscopy and energy dispersive spectroscopy. |
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Nanoscience and Nanotechnology
6:00 PM-8:00 PM, Monday, March 29, 2004 Disneyland -- North Exhibit Hall, Poster
Division of Colloid and Surface Chemistry |