| AVS 56th International Symposium & Exhibition | |
| Surface Science | Thursday Sessions |
| Session SS2-ThM |
| Session: | Electron Activated Molecular Interfaces |
| Presenter: | A. Turchanin, University of Bielefeld, Germany |
| Authors: | A. Turchanin, University of Bielefeld, Germany A. Beyer, University of Bielefeld, Germany Ch.T. Nottbohm, University of Bielefeld, Germany X. Zhang, University of Bielefeld, Germany R. Stosch, PTB-Braunschweig, Germany A. Sologubenko, University of Aachen, Germany J. Mayer, University of Aachen, Germany P. Hinze, PTB-Braunschweig, Germany T. Weimann, PTB-Braunschweig, Germany A. Gölzhäuser, University of Bielefeld, Germany |
| Correspondent: | Click to Email |
Whereas the fabrication of free-standing 0D and 1D nanomaterials like clusters, nanoparticles, nanowires, nanotubes etc. is well established at present, the fabrication of free-standing 2D materials with atomic thicknesses is not routine. In this contribution we present a route for the fabrication of novel ultrathin (~1 nm) free-standing carbon nanosheets with adjustable sizes based on molecular self-assembly. Self-assembled monolayers (SAM) of aromatic biphenyl molecules are first cross-linked by electrons [1]. Vacuum pyrolysis of the cross-linked films transforms them into a mechanically stable and conductive 2D graphitic phase consisting of nanosize graphene patches [2, 3]. Resistivity and stiffness can be tuned by the annealing temperature [3]. The transition from insulator to conductor (~100 kΩ/sq) is characterized by a variety of complementary spectroscopic and microscopic techniques (Raman Spectroscopy, XPS, UPS, NEXAFS, TDS, HTEM, STM, AFM). A plethora of applications of this novel material is visible taking advantage of the fact that size, shape, and resistivity of the nanosheets in supported and suspended states (nanomembranes) are easily controlled.
[1] W. Geyer, V. Stadler, W. Eck, M. Zharnikov, A. Gölzhäuser, M. Grunze, Appl. Phys. Lett. 75, 2401 (1999)
[2] A. Turchanin, M. El-Desawy, A. Gölzhäuser, Appl. Phys. Lett., 90, 053102 (2007)
[3] A. Turchanin, A. Beyer, Ch. T. Nottbohm, X. Zhang, R. Stosch, A. Sologubenko, J. Mayer, P. Hinze, T. Weimann, A. Gölzhäuser, Adv. Mater. 21, 1233 (2009)