Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene

@article{citeulike:3072426, abstract = {We measured the elastic properties and intrinsic breaking strength of free-standing monolayer graphene membranes by nanoindentation in an atomic force microscope. The force-displacement behavior is interpreted within a framework of nonlinear elastic stress-strain response, and yields second- and third-order elastic stiffnesses of 340 newtons per meter (N m-1) and -690 Nm-1, respectively. The breaking strength is 42 N m-1 and represents the intrinsic strength of a defect-free sheet. These quantities correspond to a Young's modulus of E = 1.0 terapascals, third-order elastic stiffness of D = -2.0 terapascals, and intrinsic strength of {sigma}int = 130 gigapascals for bulk graphite. These experiments establish graphene as the strongest material ever measured, and show that atomically perfect nanoscale materials can be mechanically tested to deformations well beyond the linear regime. 10.1126/science.1157996}, author = {Lee, Changgu and Wei, Xiaoding and Kysar, Jeffrey W. and Hone, James}, citeulike-article-id = {3072426}, doi = {10.1126/science.1157996}, journal = {Science}, keywords = {circular-hole, experiment, graphene, mechanical-properties, science}, month = {July}, number = {5887}, pages = {385--388}, posted-at = {2008-08-13 21:46:50}, priority = {2}, title = {Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene}, url = {http://dx.doi.org/10.1126/science.1157996}, volume = {321}, year = {2008} }

TY - JOUR ID - citeulike:3072426 L3 - citeulike-article-id:3072426 N2 - We measured the elastic properties and intrinsic breaking strength of free-standing monolayer graphene membranes by nanoindentation in an atomic force microscope. The force-displacement behavior is interpreted within a framework of nonlinear elastic stress-strain response, and yields second- and third-order elastic stiffnesses of 340 newtons per meter (N m-1) and -690 Nm-1, respectively. The breaking strength is 42 N m-1 and represents the intrinsic strength of a defect-free sheet. These quantities correspond to a Young's modulus of E = 1.0 terapascals, third-order elastic stiffness of D = -2.0 terapascals, and intrinsic strength of {sigma}int = 130 gigapascals for bulk graphite. These experiments establish graphene as the strongest material ever measured, and show that atomically perfect nanoscale materials can be mechanically tested to deformations well beyond the linear regime. 10.1126/science.1157996 IS - 5887 JF - Science EP - 388 TI - Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene VL - 321 SP - 385 KW - circular-hole KW - experiment KW - graphene KW - mechanical-properties KW - science AU - Lee, Changgu AU - Wei, Xiaoding AU - Kysar, Jeffrey AU - Hone, James PY - 2008/07/18/ UR - http://dx.doi.org/10.1126/science.1157996 ER -