RT Journal Article T1 Spatially Controlled Supramolecular Polymerization of Peptide Nanotubes by Microfluidics A1 Méndez Ardoy, Alejandro A1 Bayón Fernández, Alfonso A1 Yu, Ziyi A1 Abell, Chris A1 Granja Guillán, Juan Ramón A1 Montenegro García, Javier K1 Cyclic peptides K1 Self-assembly K1 Nanotubes K1 Supramolecular chemistry K1 Microfluidics K1 Dropets AB The recent advances in the supramolecular polymerization of synthetic building blocks in aqueous conditions has given rise to new artificial and biocompatible functional materials. However, despite the importance of spatially resolved self‐assembly for natural and artificial molecular machines, the spatial control of supramolecular polymerization with synthetic monomers has not been experimentally established yet. Here we describe a microfluidic‐regulated tandem process of supramolecular polymerization and droplet encapsulation to control the position of self‐assembled microfibrillar bundles of cyclic peptide nanotubes in water droplets. This method allowed the precise preferential localization of the fibres either at the interface or into the core of the droplets. UV absorbance, circular dichroism and fluorescence microscopy indicated that the microfluidic control of the stimuli (changes in pH or ionic strength) can be employed to adjust the packing degree and the spatial position of microfibrillar bundles of cyclic peptide nanotubes. Additionally, this spatially organized supramolecular polymerization of peptide nanotubes was applied in the assembly of highly ordered two‐dimensional droplet networks PB Wiley YR 2020 FD 2020 LK http://hdl.handle.net/10347/20680 UL http://hdl.handle.net/10347/20680 LA eng NO Mendez-Ardoy, A., Bayón-Fernández, A., Yu, Z., Abell, C., Granja, J..R. and Montenegro, J. (2020), Spatially Controlled Supramolecular Polymerization of Peptide Nanotubes by Microfluidics. Angew. Chem.. doi:10.1002/ange.202000103 NO This work was partially supported by the Spanish Agencia Estatal de Investigación (AEI) [SAF2017-89890-R, CTQ2016-78423-R], the Xunta de Galicia (ED431G/09, ED431C 2017/25 and 2016-AD031) and the ERDF. A. M.-A. received a MCIF from the EC (GLYCONANOPEP-750248). J. M. holds a Ramón y Cajal (RYC-2013-13784), an ERC-Stg (DYNAP-677786) and a Young Investigator Grant from the HFSP (RGY0066/2017). J. R. G. thanks to the mobility program (PRX17/00147) DS Minerva RD 4 may 2026