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  Integration of organic fluorophores in the surface of polymer-coated colloidal nanoparticles for sensing the local polarity of the environment.

Amin, F., Yushchenko, D. A., Montenegro, J. M., & Parak, W. J. (2012). Integration of organic fluorophores in the surface of polymer-coated colloidal nanoparticles for sensing the local polarity of the environment. ChemPhysChem, 13(4), 1030-1035. doi:10.1002/cphc.201100901.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-8892-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-C683-1
Genre: Journal Article

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1464963.pdf (Publisher version), 665KB
 
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 Creators:
Amin, F., Author
Yushchenko, D. A.1, Author              
Montenegro, J. M., Author
Parak, W. J., Author
Affiliations:
1Emeritus Group Laboratory of Cellular Dynamics, MPI for Biophysical Chemistry, Max Planck Society, ou_578629              

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Free keywords: Fluorescence; fluorophores; gold; nanoparticles; polymers
 Abstract: Inorganic hydrophobically capped NPs such as quantum dots, superparamagnetic iron oxide, or gold nanoparticles can be modified to make them water-soluble by their embedding in an amphiphilic polymer shell. This polymer shell can be prefunctionalized by the integration of organic fluorophores, which allows the observation of the nanoparticles with fluorescence based techniques. The fluorophore could be either located more in the hydrophobic part of the inner polymer shell, or on the hydrophilic surface pointing towards solution. Herein we prepared gold nanoparticles decorated with the organic fluorophore FE, 4′-N,N-diethylamino-3-hydroxyflavone (FE), which possesses fluorescence sensitive to the polarity and hydrogen-bonding properties of the surrounding local environment. Based on the response of FE in the polymer shell to isopropanol, and CTAB compared to the response of free FE we conclude that the FE fluorophore is situated within the inner polymer shell. Nevertheless the fluorophore in the polymer shell can still sense polarity changes in solution.

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Language(s): eng - English
 Dates: 2012-03-012012-03
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1002/cphc.201100901
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Title: ChemPhysChem
Source Genre: Journal
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Pages: - Volume / Issue: 13 (4) Sequence Number: - Start / End Page: 1030 - 1035 Identifier: -