Chemical and Structural Manipulation of Graphene and other 2D Nanomaterials for Electronics and Optoelectronics

V. Berry
University of Illinois, Chicago,
United States

Keywords: graphene, 2D nanomaterials

Summary:

The presentation will outline several chemical and structural manipulation techniques developed in our laboratory to control the properties of 2D nanomaterials. (a) Structural manipulation includes formation of wrinkles, nanoribbons and quantum dots, and (b) Chemical manipulation includes non-destructive functionalization, nanoparticle incorporation and biomolecular interfacing. The following topics will be discussed: (i) selective desiccation of bacterium under impermeable and flexible graphene via a flap-valve operation to produce axially-aligned graphene-wrinkles with anisotropic electrical properties; (ii) nanotomy process to cleave graphite nanoblocks and their exfoliation to produce graphene nanostructures (nanoribbons and quantum dots) with controlled electrical properties; (iii) wrinkling of MoS2 to control photoluminescence; (iv) unique eta-6 organometallic approach to functionalize graphene in a vapor-phase process, while retaining its structural and electrical properties and offering chemical sites for nano-interfacing of plasmonic centers for enhanced photovoltaics; (v) biointerfacing of graphene and MoS2 with cancer cells and bacteria for bionanotechnology and biomedical applications; and (vi) Photovoltaics via electronic coupling of graphene atop a bulk semiconductor to induce interfacial energy-band reorganization for light-sensitive junctions only one atom below the front surface.