| 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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Bigall, Nadja C.
Universität Hamburg
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2024Scaling Up Magnetic Nanobead Synthesis with Improved Stability for Biomedical Applications
- 2024Tailoring Bimetallic Pt/Pd Cryogels for Efficient Ethanol Electro-Oxidationcitations
- 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
- 2023Morphological Control Over Gel Structures of Mixed Semiconductor-Metal Nanoparticle Gel Networks with Multivalent Cations
- 2023Recent Advances in Functional Nanoparticle Assemblies
- 2023Optical properties of NIR photoluminescent PbS nanocrystal-based three-dimensional networks
- 2022Versatile Route for Multifunctional Aerogels Including Flaxseed Mucilage and Nanocrystals
- 2022Nanosecond Pulsed Laser-Heated Nanocrystals Inside a Metal-Organic Framework Matrix
- 2022Reaction Sintering of Ca3Co4O9 with BiCuSeO Nanosheets for High-Temperature Thermoelectric Compositescitations
- 2022Scaling Up Magnetic Nanobead Synthesis with Improved Stability for Biomedical Applications
- 2021π-Conjugated stannole copolymers synthesised by a tin-selective Stille cross-coupling reaction
- 2021Spatial Extent of Fluorescence Quenching in Mixed Semiconductor–Metal Nanoparticle Gel Networks
- 2021Reaction sintering of Ca3Co4O9 with BiCuSeO nanosheets for high-temperature thermoelectric composites
- 2021Aerogelation of Polymer-Coated Photoluminescent, Plasmonic, and Magnetic Nanoparticles for Biosensing Applications
- 2021Cryoaerogels and Cryohydrogels as Efficient Electrocatalysts
- 2020Reversible cation exchange on macroscopic CdSe/CdS and CdS nanorod based gel networks
- 2020A Versatile Route to Assemble Semiconductor Nanoparticles into Functional Aerogels by Means of Trivalent Cations
- 2019Metal-Organic Framework Co-MOF-74-Based Host-Guest Composites for Resistive Gas Sensingcitations
- 2019Patterning of Nanoparticle‐Based Aerogels and Xerogels by Inkjet Printing
- 2018Macroscopic Aerogels with Retained Nanoscopic Plasmonic Properties
- 2017Spectroelectrochemical Investigation of the Charge Carrier Kinetics of Gold-Decorated Cadmium Chalcogenide Nanorods
- 2015Noble Metal Aerogels - Synthesis, Characterization, and Application as Electrocatalysts
- 2013Mixed aerogels from Au and CdTe nanoparticlescitations
- 2010Fabrication of two-dimensional Au@FePt core-shell nanoparticle arrays by photochemical metal depositioncitations
- 2009Hydrogels and aerogels from noble metal nanoparticlescitations
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.