Premium
Thermoacoustic Emission from Carbon Nanotubes Imaged by Atomic Force Microscopy
Author(s) -
Passeri Daniele,
Sassi Ugo,
Bettucci Andrea,
Tamburri Emanuela,
Toschi Francesco,
Orlanducci Silvia,
Terranova Maria Letizia,
Rossi Marco
Publication year - 2012
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201200435
Subject(s) - carbon nanotube , materials science , acoustic wave , acoustic emission , electrode , microscopy , amplitude , atomic force acoustic microscopy , nanotube , acoustics , current (fluid) , acoustic microscopy , nanotechnology , optoelectronics , optics , composite material , magnetic force microscope , physics , magnetization , quantum mechanics , magnetic field , thermodynamics
The thermoacoustic effect of isolated single‐wall carbon nanotubes aligned between electrodes is experimentally observed for the first time by imaging the emitted acoustic wave using an atomic force microscopy‐based technique specifically developed for the task. The capability of such a technique for single‐point thermoacoustic measurements is first verified on carbon nanotubes layers with two electrodes for injecting alternate electric current. The technique is then demonstrated to allow the acquisition, simultaneously with the topography, of images reflecting the pressure of the acoustic wave at fixed distance from the sample. Such a capability is used to collect images reflecting the amplitude of acoustic waves generated by isolated nanotubes and nanotube bundles by the thermoacoustic effect.