Title :
Tunnel gap modulation spectroscopy: a scanning probe high frequency nanoscale oscillator
Author :
Biedermann, L. ; Lan, C. ; Reifenberger, R. ; Therrien, J.
Author_Institution :
Department of Physics, Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA, biedermann@purdue.edu
Abstract :
A novel tunnel gap modulation technique to measure the natural vibrational frequencies of multiwalled carbon nanotubes (MWNTs) as a function of length is described. The method requires fixing one end of the nanotube to a scanning tunneling microscope (STM) tip while the free end of the nanotube is brought within tunneling range of a substrate. The nanotube’s thermal vibrations modulate the size of the tunnel gap, leading to an oscillatory component in the tunnel current at the natural frequency of the nanotube.
Keywords :
Scanning tunneling microscopy; carbon nanotube; high-frequency resonator; Atomic measurements; Carbon nanotubes; Current measurement; Frequency measurement; Oscillators; Probes; Resonant frequency; Spectroscopy; Tunneling; Vibration measurement; Scanning tunneling microscopy; carbon nanotube; high-frequency resonator;
Conference_Titel :
Nanotechnology, 2006. IEEE-NANO 2006. Sixth IEEE Conference on
Print_ISBN :
1-4244-0077-5
DOI :
10.1109/NANO.2006.247632
