Assembly and Characterizations of Bifunctional Fluorescent and Magnetic Microneedles Displaying Length Tunability over One Decade - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Advanced Functional Materials Année : 2017

Assembly and Characterizations of Bifunctional Fluorescent and Magnetic Microneedles Displaying Length Tunability over One Decade

Résumé

We report on the fabrication of bifunctional magnetic and fluorescent microneedles (µNDs) made of a ternary mixture of magnetic nanoparticles (NPs), quantum dots (QDs) and polyelectrolyte. The assembly relies on the electrostatic complexation of negatively charged NPs with positively charged polymer strands and is controlled by the charge ratio between the nanoparticulate building blocks and the polymer mortar. We show that the resulting µNDs retain the fluorescent and superparamagnetic ú gaelle.charron@univ-paris-diderot.fr1 properties of their NP constituents. Moreover, using a combination of core and surface characterisations and a state-of-the-art image analysis algorithm, we thoroughly investigate the dependence of the brightness and length on the ternary composition. In particular, based on statistics on hundreds of µNDs with a range of compositions, we show that the length can be robustly tuned over one decade to match the relevant length scales of various applications.
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hal-02342490 , version 1 (16-12-2019)

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Jean-Baptiste Lugagne, Gwennhaël Brackx, Emek Seyrek, Sophie Nowak, Yann Sivry, et al.. Assembly and Characterizations of Bifunctional Fluorescent and Magnetic Microneedles Displaying Length Tunability over One Decade. Advanced Functional Materials, 2017, 27 (31), pp.1700362. ⟨10.1002/adfm.201700362⟩. ⟨hal-02342490⟩
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