Print Email Facebook Twitter Microfluidic Synthesis of Hydrogel Microparticles with Superparamagnetic Colloids Embedded at Prescribed Positions for Anticounterfeiting Applications Title Microfluidic Synthesis of Hydrogel Microparticles with Superparamagnetic Colloids Embedded at Prescribed Positions for Anticounterfeiting Applications Author Zhang, M. (TU Delft Complex Fluid Processing) Warth, T. (Student TU Delft) Boon, N.J.H. (TU Delft Complex Fluid Processing) Demirörs, Ahmet Faik (ETH Zürich) Eral, H.B. (TU Delft Complex Fluid Processing) Date 2022 Abstract A microfluidic platform for continuous synthesis of hydrogel microparticles with superparamagnetic colloids (SPCs) embedded at prescribed positions is described. The shape of the cross-linked microparticle is independently controlled by stop–flow lithography, whereas the position of trapped SPCs are dictated by virtual magnetic moulds made of 2D nickel patches facilitating magnetic trapping. The spatial positions of trapped SPCs collectively function as a binary code matrix for product authentication. Analytical and finite element methods are combined to optimize the trapping efficiency of SPCs by systematically investigating magnetic field microgradients produced by nickel patches. It is envisioned that the proposed magnetic microparticles will contribute to the development of soft matter inspired product quality control, tracking and anti-counterfeiting technologies. Subject anti-counterfeitinghydrogel microparticleson-dose authentication To reference this document use: http://resolver.tudelft.nl/uuid:79b9f542-e690-426a-9f38-ce6160ec8d33 DOI https://doi.org/10.1002/admi.202200899 Source Advanced Materials Interfaces, 9 (29) Part of collection Institutional Repository Document type journal article Rights © 2022 M. Zhang, T. Warth, N.J.H. Boon, Ahmet Faik Demirörs, H.B. Eral Files PDF Adv_Materials_Inter_2022_ ... lloids.pdf 2.81 MB Close viewer /islandora/object/uuid:79b9f542-e690-426a-9f38-ce6160ec8d33/datastream/OBJ/view