Ferrari, Gustavo ArrighiOliveira, Alan Barros deAlmeida, Ive Silvestre deMatos, Matheus Josué de SouzaBatista, Ronaldo Junio CamposFernandes, Thales Fernando DamascenoMeireles, Leonel MunizSilva Neto, Eliel Gomes daChacham, HelioNeves, Bernardo Ruegger AlmeidaLacerda, Rodrigo Gribel2019-06-062019-06-062018FERRARI, G. A. et al. Apparent softening of wet graphene membranes on a microfluidic platfor. ACS Nano, v. 12, n. 5, p. 4312-4320, abr. 2018. Disponível em: <https://pubs.acs.org/doi/10.1021/acsnano.7b08841>. Acesso em: 19 mar. 2019.1936-086Xhttp://www.repositorio.ufop.br/handle/123456789/11464Graphene is regarded as the toughest two-dimensional material (highest in-plane elastic properties) and, as a consequence, it has been employed/proposed as an ultrathin membrane in a myriad of microfluidic devices. Yet, an experimental investigation of eventual variations on the apparent elastic properties of a suspended graphene membrane in contact with air or water is still missing. In this work, the mechanical response of suspended monolayer graphene membranes on a microfluidic platform is investigated via scanning probe microscopy experiments. A high elastic modulus is measured for the membrane when the platform is filled with air, as expected. However, a significant apparent softening of graphene is observed when water fills the microfluidic system. Through molecular dynamics simulations and a phenomenological model, we associate such softening to a water-induced uncrumpling process of the suspended graphene membrane. This result may bring substantial modifications on the design and operation of microfluidic devices which exploit pressure application on graphene membranes.en-USrestritoMechanical propertiesLiquid interfaceArtigo publicado em periodicohttps://pubs.acs.org/doi/10.1021/acsnano.7b08841https://doi.org/10.1021/acsnano.7b08841