title: Isotopic Effect on the Gel and Glass Formation of a Charged Colloidal Clay: Laponite.
abstract: The time evolution of both dynamic and static structure factors of a charged colloidal clay, Laponite, dispersed in both H2O and D2O solvents has been investigated through multiangle dynamic light scattering (DLS) and small-angle X-ray scattering (SAXS) as a function of weight concentration. The aging phenomenology and the formation of arrested states, both gel and glass, are preserved in D2O, while the dynamics is slowed down with respect to water. These findings are important to understand the role played by the solvent in the interparticle interactions and for techniques such as neutron scattering and nuclear magnetic resonance that allow for the extension of the accessible scattering vectors and time scales.
authors.affiliation: Departamento de Física, Universidade Federal de Lavras , C.P. 3037, 37200-000 Lavras, MG, Brazil.
authors.forename: Flavio Augusto de Melo
authors.identifier: 0000-0002-6810-5955
authors.initials: FAM
authors.lastname: Marques
authors.affiliation: ISC-CNR, Sede Sapienza , I-00185 Roma, Italy.|Dipartimento di Fisica, Sapienza Università di Roma , I-00185 Roma, Italy.
authors.forename: Roberta
authors.initials: R
authors.lastname: Angelini
authors.affiliation: Dipartimento di Fisica, Sapienza Università di Roma , I-00185 Roma, Italy.|Center for Life Nano Science, IIT@Sapienza, Istituto Italiano di Tecnologia , Viale Regina Elena 291, 00161 Roma, Italy.
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Ruocco
authors.affiliation: ISC-CNR, Sede Sapienza , I-00185 Roma, Italy.|Dipartimento di Fisica, Sapienza Università di Roma , I-00185 Roma, Italy.
authors.forename: Barbara
authors.initials: B
authors.lastname: Ruzicka