期刊
ACS NANO
卷 4, 期 11, 页码 6557-6564出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn101781v
关键词
graphene oxide; mechanical properties; membranes; atomic force microscopy; finite element analysis
类别
资金
- NSF [0969106, 0742065]
- DARPA IMINT Center
- Advanced Energy Consortium
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0969106, 0742065] Funding Source: National Science Foundation
Mechanical properties of ultrathin membranes consisting of one layer, two overlapped layers, and three overlapped layers of graphene oxide platelets were investigated by atomic force microscopy (AFM) imaging in contact mode. In order to evaluate both the elastic modulus and prestress of thin membranes, the AFM measurement was combined with the finite element method (FEM) in a new approach for evaluating the mechanics of ultrathin membranes monolayer graphene oxide found to have a lower effective Young'S modulus (207 6 +/- 23 4 Gpa when a thickness of 0 7 nm is used) as compared to the value reported for pristine graphene. The prestress (39 7-76 8 MPa) of the graphene oxide membranes obtained by solution based deposition was found to be 1 order of magnitude lower than that Obtained by others for mechanically cleaved graphene The novel AFM Imaging and FEM based mapping methods presented here are of general utility for obtaining the,elastic modulus and prestress of thin membranes
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