Visualizing Resonance Energy Transfer in Supramolecular Surface Patterns of β-CD-Functionalized Quantum Dot Hosts and Organic Dye Guests by Fluorescence Lifetime Imaging
✍ Scribed by Denis Dorokhin; Shu-Han Hsu; Nikodem Tomczak; Christian Blum; Vinod Subramaniam; Jurriaan Huskens; David N. Reinhoudt; Aldrik H. Velders; G. Julius Vancso
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 927 KB
- Volume
- 6
- Category
- Article
- ISSN
- 1613-6810
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✦ Synopsis
Abstract
Detection of an analyte via supramolecular host–guest binding and quantum dot (QD)‐based fluorescence resonance energy transfer (FRET) signal transduction mechanism is demonstrated. Surface patterns consisting of CdSe/ZnS QDs functionalized at their periphery with β‐cyclodextrin (β‐CD) were obtained by immobilization of the QDs from solution onto glass substrates patterned with adamantyl‐terminated poly(propylene imine) dendrimeric “glue.” Subsequent formation of host–guest complexes between vacant β‐CD on the QD surface and an adamantyl‐functionalized lissamine rhodamine resulting in FRET was confirmed by fluorescence microscopy, spectroscopy, and fluorescence lifetime imaging microscopy (FLIM).