| AVS 55th International Symposium & Exhibition | |
| Graphene Topical Conference | Monday Sessions |
| Session GR+TF+NC-MoM |
| Session: | Graphene and 2-D Carbon Nanostructures |
| Presenter: | A. Gölzhäuser, Universität Bielefeld, Germany |
| Authors: | A. Beyer, Universität Bielefeld, Germany C.T. Nottbohm, Universität Bielefeld, Germany X. Zhang, Universität Bielefeld, Germany A. Turchanin, Universität Bielefeld, Germany A. Sologubenko, RWTH Aachen, Germany J. Mayer, RWTH Aachen, Germany A. Gölzhäuser, Universität Bielefeld, Germany |
| Correspondent: | Click to Email |
1 nm thick, mechanically and thermally stable carbon nanosheets are fabricated by combining molecular self-assembly with lithography. Self-assembled monolayers of aromatic molecules are cross-linked via electron or EUV irradiation. The cross-linked monolayers are released from the substrate, resulting in “free-standing carbon nanosheets” with the thickness of a single molecule.1 We show that the nanosheets can be transferred onto arbitrary surfaces and we determine their elastic constants by AFM. We have found that nanosheets posses an extraordinarily high mechanical and thermal stability.2 Carbon nanosheets can be used as ultrathin sample supports for transmission electron microscopy (TEM). Free-standing nanosheets were transferred onto TEM grids and nanoparticles were deposited onto them. When imaged by high-resolution TEM, the nanoparticles show a much higher contrast than those made with a conventional carbon film.3
1 W. Eck, A. Küller, M. Grunze, B. Völkel, A. Gölzhäuser: Free-standing nanosheets from cross-linked biphenyl self-assembled monolayers, Adv. Mat., 17, 2583-2587, (2005)
2 A. Turchanin, M. El-Desawy, A. Gölzhäuser: High thermal stability of cross-linked aromatic self-assembled monolayers: Nanopatterning via selective thermal desorption. Appl. Phys. Lett., 90, 053102 (2007)
3 C. T. Nottbohm, A. Beyer, A. S. Sologubenko, I. Ennen, A. Hütten, H. Rösner, W. Eck, J. Mayer, A. Gölzhäuser: Novel carbon nanosheets as support for ultrahigh resolution structural analysis of nanoparticles. Ultramicroscopy, in press.