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Max-Planck-Institut für Festkörperforschung Heisenbergstr. 3 70569 Stuttgart, Germany http://www.fkf.mpg.de
Contact Ms Claudia Daefler +49 711 6893094
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Max-Planck-Institut für Festkörperforschung

"Good vibrations" in der Nanowelt

Atomare Defekte bestimmen das Schwingungsverhalten von Kohlenstoff-Nanoröhren

(PresseBox) (Stuttgart, )
Es war schon immer ein Traum der Forscher, die Schwingungsmoden von molekularen Ketten am Ort eines speziellen Atoms untersuchen zu können. Jetzt ist es einem Forscherteam am Max-Planck-Institut für Festkörperforschung mit Hilfe eines Rastertunnelmikroskops erstmals gelungen, die Schwingungsmoden von Kohlenstoff-Nanoröhren mit höchster, also atomarer Auflösung zu messen. Dabei stellten die Wissenschaftler fest, dass die Nanoröhren in der Nähe von atomaren Defekten lokal geänderte elektronische und mechanische Eigenschaften zeigen, die weitreichende Konsequenzen für ihr Verhalten als Ganzes haben (Physical Review Letters, 24. September 2004).

Abb.: Schematische Darstellung einer Kohlenstoff-Nanoröhre unter der Spitze eines Rastertunnelmikroskops. Die Spitze wird entlang der Röhrchenachse bewegt
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