Grant: $380,130 - National Science Foundation - Jun. 22, 2009
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Award Description: This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The objective of this project is to develop a theoretical framework for monolayer graphene based on nonlinear continuum mechanics and atomistic modeling. Within the framework, the fundamental mechanical properties of monolayer graphene and its derivatives will be systematically studied. First, a nonlinear continuum theory will be developed for two-dimensional sheets under arbitrary deformation in the three-dimensional space. Next, atomistic modeling approaches will be developed to simulate and deduce the fundamental mechanical properties of monolayer graphene. The continuum theory and atomistic modeling methodology will then be combined to study carbon nanotubes and graphene nanoribbons as two basic forms of graphene-based materials. Finally, integrated graphene structures with graphene monolayers interacting with supporting substrates will be investigated. With a wealth of exceptional physical properties, graphene holds great promises for a variety of applications, including graphene-based composite materials, nanoelectronics and electromechanical resonators. The research on mechanical properties of graphene will complement the already abundant research activities in material science and condensed-matter physics that have largely focused on its electronic properties. It is envisioned that fundamental understanding of the mechanics of graphene-based materials will open new perspectives for both fundamental physics and practical applications. In addition, education and outreach activities will be incorporated within the proposed project to enhance its societal impacts.
Project Description: The objective of this project is to develop a theoretical framework for monolayer graphene based on nonlinear continuum mechanics and atomistic modeling. Started on September 1, 2009, we have progressed in two sub-directions. One is concerned with the excess energy and deformation along free edges of graphene nanoribbons, for which have developed both atomistic simulations and a continuum model based on thermodynamics. The other addresses the van der Waals interactions between a graphene monolayer and an oxide substrate and the induced topological instability as a result of thermal strain or surface roughness. Research results are promising in both directions, and two papers are currently in preparation. One postdoctoral researcher and one undergraduate assistant are employed for the project.
Jobs Summary: The following appointments were effected on this project: ASSISTANT (UNDERGRAD) (0.50 FTE); GRAD RES ASST (0.25 FTE); and POSTDOCTORAL FELLOW (1.00 FTE). The calculations for Number of Jobs were calculated using OMB guidance. (Total jobs reported: 2)
Project Status: Less Than 50% Completed
This award's data was last updated on Jun. 22, 2009. Help expand these official descriptions using the wiki below.