| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hertwig, Andreas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (25/25 displayed)
- 2024A multi-method study of femtosecond laser modification and ablation of amorphous hydrogenated carbon coatings
- 2024A multi-method study of femtosecond laser modification and ablation of amorphous hydrogenated carbon coatings
- 2024Picosecond laser processing of hierarchical micro–nanostructures on titanium alloy upon pre- and postanodization: morphological, structural, and chemical effects
- 2024Investigations of the adsorbed layer of polysulfone: Influence of the thickness of the adsorbed layer on the glass transition of thin filmscitations
- 2024Optical and tactile measurements on SiC sample defects
- 2024Optical and tactile measurements on SiC sample defects
- 2023Chemical and topographical changes upon sub-100-nm laser-induced periodic surface structure formation on titanium alloy: the influence of laser pulse repetition rate and number of over-scanscitations
- 2023Formation of laser-induced periodic surface structures on Zr-based bulk metallic glasses with different chemical compositioncitations
- 2023Influence of nanoparticle encapsulation and encoding on the surface chemistry of polymer carrier beadscitations
- 2023Influence of nanoparticle encapsulation and encoding on the surface chemistry of polymer carrier beadscitations
- 2023Growth kinetics of the adsorbed layer of poly(bisphenol A carbonate) and its effect on the glass transition behavior in thin filmscitations
- 2023Application of imaging ellipsometry and white light interference microscopy for detection of defects in epitaxially grown 4H–SiC layerscitations
- 2022Multilevel effective material approximation for modeling ellipsometric measurements on complex porous thin filmscitations
- 2021Do Interfacial Layers in Thin Films Act as an Independent Layer Within Thin Films?citations
- 2021Single Femtosecond Laser-Pulse-Induced Superficial Amorphization and Re-Crystallization of Siliconcitations
- 2020Development of layer‐by‐layer assembled thin coatings on aluminium alloy AA2024‐T3 for high resolution studies of local corrosion processes
- 2020Development of layer-by-layer assembled thin coatings on aluminium alloy AA2024-T3 for high resolution studies of local corrosion processescitations
- 2020Colloidal bimetallic platinum–ruthenium nanoparticles in ordered mesoporous carbon films as highly active electrocatalysts for the hydrogen evolution reaction
- 2017Ellipsometric porosimetry on pore-controlled TiO2 layerscitations
- 2017Decoupling of dynamic and thermal glass transition in thin films of a PVME/PS blendcitations
- 2016New approach on quantification of porosity of thin films via electron-excited X‑ray spectracitations
- 2016Preparation of pulsed DC magnetron deposited Fe-doped SnO2 coatingscitations
- 2010Imaging the microstructure of duplex stainless steel samples with TOF-SIMScitations
- 2007Hydrogen-Containing Amorphous Carbon Layers as Optical Materials in the Near-IR Spectral Rangecitations
- 2004Surface damage and color centers generated by femtosecond pulses in borosilicate glass and silicacitations
Places of action
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document
Influence of nanoparticle encapsulation and encoding on the surface chemistry of polymer carrier beads
Abstract
Surface-functionalized polymer beads encoded with molecular luminophores and nanocrystalline emitters such as semiconductor nanocrystals, often referred to as quantum dots (QDs), or magnetic nanoparticles are broadly used in the life sciences as reporters and carrier beads. Many of these applications require a profound knowledge of the chemical nature and total number of their surface functional groups (FGs), that control bead charge, colloidal stability, hydrophobicity, and the interaction with the environment and biological systems. For bioanalytical applications, also the number of groups accessible for the subsequent functionalization with, e.g., biomolecules or targeting ligands is relevant. In this study, we explore the influence of QD encoding on the amount of carboxylic acid (COOH) surface FGs of 2 μm polystyrene microparticles (PSMPs). This is done for frequently employed oleic acid and oleylamine stabilized, luminescent core/shell CdSe QDs and two commonly used encoding procedures. This included QD addition during bead formation by a thermally induced polymerization reaction and a post synthetic swelling procedure. The accessible number of COOH groups on the surface of QD-encoded and pristine beads was quantified by two colorimetric assays, utilizing differently sized reporters and electrostatic and covalent interactions. The results were compared to the total number of FGs obtained by a conductometric titration and Fourier transform infrared spectroscopy (FTIR). In addition, a comparison of the impact of QD and dye encoding on the bead surface chemistry was performed. Our results demonstrate the influence of QD encoding and the QD-encoding strategy on the number of surface FG that is ascribed to an interaction of the QDs with the carboxylic acid groups on the bead surface. These findings are of considerable relevance for applications of nanoparticle-encoded beads and safe-by-design concepts for nanomaterials.