| AVS 54th International Symposium | |
| Biomaterial Interfaces | Thursday Sessions |
| Session BI-ThP |
| Session: | Biomaterial Interfaces Poster Session |
| Presenter: | T.G. Lee, KRISS, Korea |
| Authors: | T.G. Lee, KRISS, Korea H. Min, KRISS, Korea Y. Kim, POSTECH, Korea S.J. Lim, POSTECH, Korea D.W. Moon, KRISS, Korea S.K. Shin, POSTECH, Republic of Korea |
| Correspondent: | Click to Email |
Water-soluble CdSe/ZnS core/shell quantum dots capped by 3-mercaptopropionic acid(MPA) have been studied by using time-of-flight secondary ion spectroscopy (TOF-SIMS) imaging analysis. TOF-SIMS images provide direct evidence of local chemical information on the quantum dot surfaces. The water-soluble quantum dots can be conjugated with protein, DNA and other biomolecules, and thus be useful to applying to bioimaging and biosensing. These quantum dots were generated by converting original organic soluble ligands to MPA ligands. We characterized both surfaces of water soluble and organic soluble quantum dots and confirmed the successful exchange of ligands by using TOF-SIMS images of ligand molecules and molecular metal adducts.