Regensburg 2022 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 13: Nanostructures at Surfaces 2

O 13.2: Vortrag

Montag, 5. September 2022, 15:15–15:30, S052

Synthesis of metal sulfide nanoribbons on graphene by self-assembly — •Xuejiao Zhang, Kelvin Anggara, Vesna Srot, Xu Wu, Peter A. van Aken, and Klaus Kern — Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany

Bottom-up synthesis of nanostructures on surface have relied on the self-assembly of nanoscale building blocks. The diversity of accessible nanostructures however have been constrained by the limited choice of atomic and molecular building blocks that can be evaporated on surface. Here we bypass this limitation by using complex inorganic ions generated from electrospray ionization as building blocks to synthesize nanostructures on surfaces. We deposited HMonS3n+1** (n = 4-6) ions onto a freestanding single-layer graphene by Electrospray Ion-Beam Deposition (ESIBD), and imaged the resulting nanostructures by aberration-corrected Scanning Transmission Electron Microscopy (STEM). The molecules were observed to form anisotropic, single-layered, crystalline MoS2 nanoflakes (< 100 nm2), which in turn self-assembled into MoS2 nanoribbons extending as far as 1 μm. The first observation of such nanostructures evidences the potential of this approach to prepare previously inaccessible nanomaterials on surfaces.