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Boldt, K.* ; Bruns, O.T. ; Gaponik, N.* ; Eychmüller, A.*

Comparative examination of the stability of semiconductor quantum dots in various biochemical buffers.

J. Phys. Chem. B 110, 1959-1963 (2006)

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Open Access Green as soon as Postprint is submitted to ZB.

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Due to their greater photostability compared to established organic fluorescence markers, semiconductor quantum dots provide an attractive alternative for the biolabeling of living cells. On the basis of a comparative investigation using differently sized thiol-stabilized CdTe nanocrystals in a variety of commonly used biological buffers, a method is developed to quantify the stability of such a multicomponent system. Above a certain critical size, the intensity of the photoluminescence of the nanocrystals is found to diminish with pseudo-zero-order kinetics, whereas for specific combinations of particle size, ligand, and buffer there appears to be no decay below this critical particle size, pointing out the necessity for thorough investigations of this kind in the view of prospect applications of semiconductor nanocrystals in the area of biolabeling.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

ISSN (print) / ISBN 1520-6106

e-ISSN 1520-5207

Journal Journal of Physical Chemistry B

Quellenangaben Volume: 110, Issue: 5, Pages: 1959-1963

Publisher American Chemical Society (ACS)

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Helmholtz Pioneer Campus (HPC)