Document Details Document Type : Article In Journal  Document Title : Elastic coupling between layers in two-dimensional materials Elastic coupling between layers in two-dimensional materials   Subject : physics  Document Language : English  Abstract : Two-dimensional materials, such as graphene and MoS2, are films of a few atomic layers in thickness with strong in-plane bonds and weak interactions between the layers. The in-plane elasticity has been widely studied in bending experiments where a suspended film is deformed substantially; however, little is known about the films' elastic modulus perpendicular to the planes, as the measurement of the outof- plane elasticity of supported 2D films requires indentation depths smaller than the films' interlayer distance. Here, we report on sub-angstrom-resolution indentation measurements of the perpendicularto- the-plane elasticity of 2D materials. Our indentation data, combined with semi-analytical models and density functional theory, are then used to study the perpendicular elasticity of few-layer-thick graphene and graphene oxide films. We find that the perpendicular Young's modulus of graphene oxide films reaches a maximum when one complete water layer is intercalated between the graphitic planes. This non-destructive methodology can map interlayer coupling and intercalation in 2D films.  ISSN : 1476-1122  Journal Name : NATURE MATERIALS  Volume : 14  Issue Number : 7  Publishing Year : 1435 AH 2015 AD  Article Type : Article  Added Date : Monday, August 21, 2017  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email Y Gao Gao, Y Investigator Doctorate   S kim kim, S Researcher Doctorate   S Zhou Zhou, S Researcher Doctorate   H.C Chiu Chiu, H.C Researcher Doctorate   D Nelias Nelias, D Researcher Doctorate   C Berger Berger, C Researcher Doctorate   W de Heer de Heer, W Researcher Doctorate   L Polloni Polloni, L Researcher Doctorate   R Sordan, Sordan,, R Researcher Doctorate   A Bongiorno Bongiorno, A Researcher Doctorate angelo.bongiorno@gatech.edu Files File Name Type Description  42703.pdf pdf   Back To Researches Page