Related Experiment Video
Updated: Jun 8, 2026
12:51
Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
Published on: December 9, 2013
Tailor-made conjugated polymer nanoparticles for multicolor and multiphoton cell imaging
Johannes Pecher1, Johannes Huber, Martin Winterhalder
1University of Konstanz, Department of Chemistry, Universitätsstrasse 10, Konstanz, Germany.
Biomacromolecules
|September 25, 2010
Summary
Researchers created fluorescent polymer nanoparticles using a novel aqueous mini-emulsion method. These photostable nanoparticles can be tuned for color and are safely taken up by cells for imaging applications.
Area of Science:
- Polymer Chemistry
- Materials Science
- Nanotechnology
Background:
- Poly(arylene ethynylene)s (PAEs) are known for their fluorescence.
- Controlling nanoparticle properties and their biological interactions is crucial for applications.
Purpose of the Study:
- To develop a method for synthesizing stable, fluorescent poly(arylene ethynylene) nanoparticles in aqueous media.
- To tune the emission color of these nanoparticles and evaluate their biocompatibility and cellular uptake.
Main Methods:
- Sonogashira coupling in aqueous mini-emulsion polymerization.
- Covalent incorporation of pyrrolo-pyrrole or fluorenone acceptors.
- Characterization of particle size, fluorescence, and two-photon properties.
- Cellular uptake studies with HeLa cells using various microscopy techniques.
Main Results:
- Colloidally stable PAE nanoparticles (60-120 nm) with high fluorescence were synthesized.
- Emission color was tuned from blue to orange by incorporating energy acceptors.
- Particles exhibited high two-photon action cross sections (10^6–10^7 GM).
- HeLa cells readily took up nanoparticles without adverse effects.
Conclusions:
- Aqueous mini-emulsion polymerization is an effective method for producing tunable, fluorescent PAE nanoparticles.
- These nanoparticles show promise for bioimaging applications due to their photostability, tunable emission, and biocompatibility.
