Krauser, J. ; Gehrke, H.-G. ; Hofsäss, H. ; Trautmann, C. ; Weidinger, A. (2013)
Conductive tracks of 30-MeV C60 clusters in doped and undoped tetrahedral amorphous carbon.
In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 307
doi: 10.1016/j.nimb.2012.12.081
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In insulating tetrahedral amorphous carbon (ta-C), the irradiation with 30-MeV C60 cluster ions leads to the formation of well conducting tracks. While electrical currents through individual tracks produced with monoatomic projectiles (e.g. Au or U) often exhibit rather large track to track fluctuations, C60 clusters are shown to generate highly conducting tracks with very narrow current distributions. Additionally, all recorded current–voltage curves show linear characteristics. These findings are attributed to the large specific energy loss dE/dx of the 30-MeV C60 clusters. We also investigated C60 tracks in ta-C films which were slightly doped with B, N or Fe during film growth. Doping apparently increases the ion track conductivity. However, at the same time the insulating characteristics of the pristine ta-C film can be reduced. The present C60 results are compared with data from earlier experiments with monoatomic heavy ion beams. The investigations were performed by means of atomic force microscopy including temperature dependent conductivity measurements of single ion tracks.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2013 |
| Autor(en): | Krauser, J. ; Gehrke, H.-G. ; Hofsäss, H. ; Trautmann, C. ; Weidinger, A. |
| Art des Eintrags: | Bibliographie |
| Titel: | Conductive tracks of 30-MeV C60 clusters in doped and undoped tetrahedral amorphous carbon |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Juli 2013 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |
| Jahrgang/Volume einer Zeitschrift: | 307 |
| DOI: | 10.1016/j.nimb.2012.12.081 |
| Kurzbeschreibung (Abstract): | In insulating tetrahedral amorphous carbon (ta-C), the irradiation with 30-MeV C60 cluster ions leads to the formation of well conducting tracks. While electrical currents through individual tracks produced with monoatomic projectiles (e.g. Au or U) often exhibit rather large track to track fluctuations, C60 clusters are shown to generate highly conducting tracks with very narrow current distributions. Additionally, all recorded current–voltage curves show linear characteristics. These findings are attributed to the large specific energy loss dE/dx of the 30-MeV C60 clusters. We also investigated C60 tracks in ta-C films which were slightly doped with B, N or Fe during film growth. Doping apparently increases the ion track conductivity. However, at the same time the insulating characteristics of the pristine ta-C film can be reduced. The present C60 results are compared with data from earlier experiments with monoatomic heavy ion beams. The investigations were performed by means of atomic force microscopy including temperature dependent conductivity measurements of single ion tracks. |
| Freie Schlagworte: | Conducting ion tracks, Tetrahedral amorphous carbon, Cluster ion beam |
| Zusätzliche Informationen: | 18th International Conference on Ion Beam Modifications of Materials (IBMM2012) |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Ionenstrahlmodifizierte Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 03 Apr 2014 09:18 |
| Letzte Änderung: | 03 Apr 2014 09:18 |
| PPN: | |
| Sponsoren: | This work was financial supported by DFG (HO 1125/17-1 and KR 3298/1-1). |
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