2015/05/13 by Stephen T. Gill, John H. Hinnefeld, J. Henry Hinnefeld +5 · 48 citations
Engineering · Materials Science · Physics and Astronomy · #2D Materials and Applications #Advanced Memory and Neural Computing #Conformal map #Geometry #Graphene #Graphene research and applications #Materials science #Nanotechnology #Optics #Optoelectronics #Physics #Raman spectroscopy #Strain (injury) #Strain engineering #cond-mat.mes-hall
paper · pdf · doi:10.1021/acsnano.5b00335
published in ACS Nano 9(6), 5799-5806 (American Chemical Society)
openalex publication_date 2015/05/13 · arxiv created 2015/07/06 · arxiv updated 2018/03/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Strain can tune desirable electronic behavior in graphene, but there has been limited progress in controlling strain in graphene devices. In this paper, we study the mechanical response of graphene on substrates patterned with arrays of mesoscale pyramids. Using atomic force microscopy, we demonstrate that the morphology of graphene can be controlled from conformal to suspended depending on the arrangement of pyramids and the aspect ratio of the array. Nonuniform strains in graphene suspended across pyramids are revealed by Raman spectroscopy and supported by atomistic modeling, which also indicates strong pseudomagnetic fields in the graphene. Our results suggest that incorporating mesoscale pyramids in graphene devices is a viable route to achieving strain-engineering of graphene.