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Semiconductor Quantum Dots for Biosensing and In Vivo Imaging

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3 Author(s)
Yun Xing ; Dept. of Radiol., Stanford Univ., Stanford, CA ; Zuyong Xia ; Jianghong Rao

Semiconductor quantum dots (QDs) have captivated researchers in the biomedical field over the last decade. Compared to organic dyes and fluorescent proteins, QDs have unique optical properties such as tunable emission spectra, improved brightness, superior photostability, and simultaneous excitation of multiple fluorescence colors. Since the first successful reports on the biological use of QDs a decade ago, QDs and their bioconjugates have been successfully applied to various imaging applications including fixed cell labeling, live-cell imaging, in situ tissue profiling, fluorescence detection and sensing, and in vivo animal imaging. In this review, we will briefly survey the optical properties of QDs, the biofunctionalization strategies, and focus on their biosensing and in vivo imaging applications. We conclude with a discussion on the issues and perspectives on QDs as biosensing probes and in vivo imaging agents.

Published in:

NanoBioscience, IEEE Transactions on  (Volume:8 ,  Issue: 1 )

Date of Publication:

March 2009

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