Domain-boundary independency of Raman spectra for strained graphene at strong interfaces

摘要: Abstract Strains in graphene play a significant role graphene-based flexible devices, but many aspects of the domain boundary effects strained remain unclear, such as evolution Raman spectra. Here we present systematic investigation on spectra graphene, using designed strong interface formed by formvar resins. We achieve single-crystal far largest strain up to 2%, significantly improved from previous highest value 1.3%, well redshift and splitting for its G 2D peaks. More importantly, bi-crystal with show that spectral follows same trend single crystal, this was also confirmed result polycrystalline demonstrating straining effect peaks at interfaces is actually independent boundaries, different report deposited weak interfaces. attribute it efficient interfacial stress transfer interfaces, believe they can provide new insights into understanding mechanical behaviors valuable guidance electronics.