“Clickable” graphene nanoribbons for biosensor interfaces
Roger Hasler, Gonzalo E. Fenoy, Alicia Götz, Verónica Montes‐García, Cataldo Valentini, Zijie Qiu, Christoph Kleber, Paolo Samorı́, Kläus Müllen, Wolfgang Knoll
Abstract
, a DNA aptamer), enabling selective and sensitive detection of Interleukin 6 (IL6). Moreover, when applied as the intermediate linker on reduced graphene oxide (rGO)-based field-effect transistors (FETs), the GNRs provide improved robustness compared to conventional aromatic bi-functional linker molecules. GNRs enable an orthogonal and covalent attachment of a recognition unit with a considerably higher probe density than previously established methods. Interestingly, we demonstrate that GNRs introduce photoluminescence (PL) when applied to rGO-based FETs, paving the way toward the simultaneous optical and electronic probing of the attached biointerface.