Single Wall Carbon Nanotubes Filled with Metallocenes: a First Example of Non-Fullerene Peapods

We report the synthesis and analysis of metallocenes (ferrocene, chromocene, ruthenocene, vanadocene, tungstenocene-dihydride) encapsulated in single wall carbon nanotubes (SWNTs). In the case of ferrocene, efficient filling of the SWNTs was accomplished from both the liquid and the vapor phase. The other two metallocenes were filled from the vapor phase. High resolution transmission electron microscopy reveals single molecular chains of metallocenes inside SWNTs. Molecules move under the electron beam in the SWNTs indicating the absence of strong chemical bonds between each other and the SWNT wall. Their movement freezes after short illumination as a result of irradiation damage. Energy dispersive X-ray spectrometry confirms the presence of iron, chromium, ruthenium, vanadium and tungsten. Comments Copyright Materials Research Society. Reprinted from MRS Proceedings Volume 706. 2001 Fall Meeting Symposium Z Making Functional Materials with Nanotubes Publisher URL: http://www.mrs.org/members/proceedings/fall2001/z/Z7_8.pdf This conference paper is available at ScholarlyCommons: http://repository.upenn.edu/mse_papers/16 Single Wall Carbon Nanotubes Filled With Metallocenes: a First Example of Non-Fullerene Peapods F. Stercel, N. M. Nemes, J. E. Fischer, D. E. Luzzi Department of Materials Science and Engineering, University of Pennsylvania Philadelphia, PA 19104-6272