NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Probing Dynamic Fluorescence Properties of Single and Clustered Quantum Dots Towards Quantitative Biomedical Imaging of Cells
Published
Author(s)
Hyeong G. Kang, Fuyuki Tokumasu, Matthew L. Clarke, Zhenping Zhou, Jianyong Tang, Tinh Nguyen, Jeeseong Hwang
Abstract
We present results on dynamical fluorescence properties of bioconjugated nanocrystals or quantum dots (QDs) in different chemical and physical environments. A variety of QD samples were prepared and compared: isolated individual QDs, QDs aggregated into clusters, and QDs conjugated to other nanoscale materials such as single walled carbon nanotubes and proteins in the plasma membrane of human erythrocytes. We discuss plausible scenarios to explain the results obtained for the fluorescence characteristics of QDs in these samples especially for the excitation time dependent fluorescence emission from clustered QDs. We also qualitatively demonstrate enhanced fluorescence emission signal from clustered QDs and deduce that the band 3 membrane proteins in erythrocyte membranes are clustered. This approach is promising for the development of QD-based quantitative molecular imaging techniques for biomedical studies involving clustering of biomolecules.
Citation
Wiley Interdisciplinary Reviews: Nanomedicine and Nanobiotechnology
Kang, H.
, Tokumasu, F.
, Clarke, M.
, Zhou, Z.
, Tang, J.
, Nguyen, T.
and Hwang, J.
(2009),
Probing Dynamic Fluorescence Properties of Single and Clustered Quantum Dots Towards Quantitative Biomedical Imaging of Cells, Wiley Interdisciplinary Reviews: Nanomedicine and Nanobiotechnology, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=902907
(Accessed October 8, 2025)