Premium
Self‐oscillations of carbon nanotube twist‐yarn during field emission
Author(s) -
Kleshch V. I.,
Zakhidov Al. A.,
Obraztsov A. N.,
Obraztsova E. D.,
Baughman R. H.
Publication year - 2009
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200982291
Subject(s) - carbon nanotube , spinning , materials science , field electron emission , oscillation (cell signaling) , voltage , common emitter , anode , nanotube , nanotechnology , field (mathematics) , optoelectronics , mechanics , electrode , composite material , physics , electrical engineering , chemistry , engineering , biochemistry , pure mathematics , electron , mathematics , quantum mechanics
Electromechanical self‐oscillations were induced during field emission from the lateral surface of a twisted nanotube yarn obtained by solid‐state spinning from a forest of vertically aligned multi‐wall carbon nanotubes (CNT). Oscillations at several kilohertz frequencies were driven by applying a constant voltage between fixed opposite ends of the nanotube yarn and a flat anode. An electromechanical model is developed which explains the observed phenomenon. The model is equally applicable to any mechanically flexible field emitter including single nanoemitters like CNTs, which have shown a self‐oscillating behaviour in several previous in situ experiments. This phenomenon opens a possibility of developing a new type of devices for conversion of DC voltage into the high frequency electromagnetic oscillations utilizing flexible nanoemitters.