Record Details
UV-assisted lipoic acid ligand exchange of copper indium disulfide-zinc sulfide core-shell quantum dots
ScholarsArchive at Oregon State University
| Field | Value |
|---|---|
| Title | UV-assisted lipoic acid ligand exchange of copper indium disulfide-zinc sulfide core-shell quantum dots |
| Names |
Porth, Lane D.
(creator) Herman, Gregory S. (advisor) |
| Date Issued | 2015-05-14 (iso8601) |
| Note | Honors Bachelor of Science (HBS) |
| Abstract | Water-soluble quantum dots obtained through ligand exchange are widely applicable for biological imaging and marking, LEDs, and photovoltaics. Lipoic acid (LA) was reduced to dihydrolipoic acid (DHLA) using 365-nm soft UV light in a process known as photoligation, and ligand exchange with dodecanethiol-capped CuInSâ‚‚-ZnS core-shell quantum dots occurred. The reaction was allowed to proceed 24-48 hours when using 50 mM LA in methanol and quantum dots dissolved in hexane. Reaction success was confirmed by continued solubility of quantum dots in methanol following high-speed centrifugation. The product was characterized using UV-visible spectroscopy, photoluminescence, and Raman spectroscopy. Quantum yield decreased from approximately 25% to 3% and a small red shift in peak location was observed after ligand exchange. The process described shows great promise for producing water-soluble quantum dots. Functionalization and end uses can be explored following additional experiments to improve water solubility and quantum yield. |
| Genre | Thesis |
| Topic | quantum dots |
| Identifier | http://hdl.handle.net/1957/55899 |
