title: Effect of Hydrodynamic Forces on meso-(4-Sulfonatophenyl)-Substituted Porphyrin J-Aggregate Nanoparticles: Elasticity, Plasticity and Breaking.
abstract: The J aggregates of 4-sulfonatophenyl meso-substituted porphyrins are non-covalent polymers obtained by self-assembly that form nanoparticles of different morphologies. In the case of high aspect-ratio nanoparticles (bilayered ribbons and monolayered nanotubes), shear hydrodynamic forces may modify their shape and size, as observed by peak force microscopy, transmission electron microscopy of frozen solutions, small-angle X-ray scattering measurements in a disk-plate rotational cell, and cone-plate rotational viscometry. These nanoparticles either show elastic or plastic behaviour: there is plasticity in the ribbons obtained upon nanotube collapse on solid/air interfaces and in viscous concentrated nanotube solutions, whereas elasticity occurs in the case of dilute nanotube solutions. Sonication and strong shear hydrodynamic forces lead to the breaking of the monolayered nanotubes into small particles, which then associate into large colloidal particles.
authors.affiliation: Department of Organic Chemistry, Institute of Cosmos Science (IEEC-UB), University of Barcelona (UB), c. Martí I Franquès 1, 08028, Barcelona, Catalonia, Spain. zelhachemic@ub.edu.
authors.forename: Zoubir
authors.initials: Z
authors.lastname: El-Hachemi
authors.affiliation: Aix Marseille Université, CNRS UMR 7313, iSm2, Chirosciences, Marseille, France.
authors.forename: Teodor Silviu
authors.initials: TS
authors.lastname: Balaban
authors.affiliation: Department of Chemical Engineering, Polytechnic University of Catalonia (UPC), Av. Diagonal 647, Barcelona, Catalonia, 08028, Spain.
authors.forename: J Lourdes
authors.initials: JL
authors.lastname: Campos
authors.affiliation: Department of Organic Chemistry, Institute of Cosmos Science (IEEC-UB), University of Barcelona (UB), c. Martí I Franquès 1, 08028, Barcelona, Catalonia, Spain.
authors.forename: Sergio
authors.initials: S
authors.lastname: Cespedes
authors.affiliation: Department of Organic Chemistry, Institute of Cosmos Science (IEEC-UB), University of Barcelona (UB), c. Martí I Franquès 1, 08028, Barcelona, Catalonia, Spain.
authors.forename: Joaquim
authors.initials: J
authors.lastname: Crusats
authors.affiliation: ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallès, Catalonia, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Escudero
authors.affiliation: ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallès, Catalonia, Spain.
authors.forename: Christina S
authors.initials: CS
authors.lastname: Kamma-Lorger
authors.affiliation: Department of Chemical Engineering, University of Barcelona, c. Martí I Franquès 1, 08028, Barcelona, Catalonia, Spain.
authors.forename: Joan
authors.initials: J
authors.lastname: Llorens
authors.affiliation: ALBA Synchrotron Light Source, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallès, Catalonia, Spain.
authors.forename: Marc
authors.initials: M
authors.lastname: Malfois
authors.affiliation: Center for Rapid and Sustainable Product Development, Polytechnic Institute of Leiria, Rua de Portugal, 2430-028 Marinha Grande, Portugal.
authors.forename: Geoffrey R
authors.initials: GR
authors.lastname: Mitchell
authors.affiliation: Center for Rapid and Sustainable Product Development, Polytechnic Institute of Leiria, Rua de Portugal, 2430-028 Marinha Grande, Portugal.
authors.forename: Ana P
authors.initials: AP
authors.lastname: Tojeira
authors.affiliation: Department of Organic Chemistry, Institute of Cosmos Science (IEEC-UB), University of Barcelona (UB), c. Martí I Franquès 1, 08028, Barcelona, Catalonia, Spain. jmribo@ub.edu.
authors.forename: Josep M
authors.initials: JM
authors.lastname: Ribó
keywords: aggregation; nanoparticles; porphyrinoids; structure elucidation; supramolecular chemistry