Surface Modification of Luminescent Lanthanide Phosphate Nanorods with Cationic ``Quat-primer'' Polymers

Autor(en): Komban, Rajesh
Beckmann, Ralph
Rode, Sebastian
Ichilmann, Sachar
Kuehnle, Angelika
Beginn, Uwe 
Haase, Markus 
Stichwörter: CELLS; Chemistry; Chemistry, Multidisciplinary; Chemistry, Physical; GOLD NANORODS; Materials Science; Materials Science, Multidisciplinary; NANOPARTICLES; QUANTUM DOTS
Erscheinungsdatum: 2011
Herausgeber: AMER CHEMICAL SOC
Journal: LANGMUIR
Volumen: 27
Ausgabe: 16
Startseite: 10174
Seitenende: 10183
Zusammenfassung: 
``Quat-primer'' polymers bearing cationic groups were investigated as a surface modifier for Tb-doped cerium phosphate green-emitting fluorescent nanorods (NRs). The NRs were synthesized by a microwave process without using any complex agents or ligands and were characterized with different analytical tools such as X-ray diffraction, transmission electron microscopy, and fluorescence spectroscopy. Poly(ethyleneimine) partially quarternized with glycidyltrimethylammonium chloride was synthesized separately and characterized in detail. H-1 and C-13 NMR spectroscopic studies revealed that the quaternary ammonium group was covalently attached to the polymer. UV-vis spectroscopy was used to examine the stability of the colloidal dispersions of the bare NRs as well as the modified NRs zeta potential, thermogravimetric analysis, and atomic force microscopy studies were carried out to confirm that the positively charged Quat-primer polymer is adsorbed on the negatively charged surface of the NRs, which results in high dispersion stability. Emission spectra of the modified NRs indicated that there was no interference of the Quat-primer polymer with the fluorescence behavior.
ISSN: 07437463
DOI: 10.1021/la2014286

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