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Title: Apparent softening of wet graphene membranes on a microfluidic platfor.
Authors: Ferrari, Gustavo Arrighi
Oliveira, Alan Barros de
Almeida, Ive Silvestre de
Matos, Matheus Josué de Souza
Batista, Ronaldo Junio Campos
Fernandes, Thales Fernando Damasceno
Meireles, Leonel Muniz
Silva Neto, Eliel Gomes da
Chacham, Helio
Neves, Bernardo Ruegger Almeida
Lacerda, Rodrigo Gribel
Keywords: Mechanical properties
Liquid interface
Issue Date: 2018
Citation: FERRARI, 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: <>. Acesso em: 19 mar. 2019.
Abstract: Graphene 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.
ISSN: 1936-086X
Appears in Collections:DEFIS - Artigos publicados em periódicos

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