Title :
Temperature dependent electron field emission from multiwalled carbon nanotubes and its possible application as nanothermometer
Author :
Ahmed, Sk F. ; Mitra, M.K. ; Chattopadhyay, K.K.
Author_Institution :
Jadavpur Univ., Kolkata
Abstract :
Multiwalled carbon nanotubes have been synthesized by direct current PECVD technique. Scanning electron microscope studies showed that the average diameter of the MWCNTs is ~ 20 nm with length several micrometer. It is found that the turn-on field and emission current density are dependent on the ambient temperature of the nanotubes. The turn-on field was found to decrease from 4.0 V/mum to 1.4 V/mum when the temperature was raised from 25degC to 375degC. The temperature dependent field electron emission from CNTs has been carried out keeping in view the potential for development of direct thermal-to-electrical power conversion applications.
Keywords :
carbon nanotubes; chemical vapour deposition; current density; electron field emission; nanotube devices; scanning electron microscopy; thermoelectric conversion; thermometers; work function; direct current PECVD technique; direct thermal-to-electrical power conversion applications; emission current density; multiwalled carbon nanotubes; nanothermometer; scanning electron microscope; temperature dependent electron field emission; turn-on field density; work function; Carbon dioxide; Carbon nanotubes; Diamond-like carbon; Electron emission; Flat panel displays; Monitoring; Radio frequency; Sputtering; Substrates; Temperature dependence; Carbon; Electron emission; Temperature; Work function;
Conference_Titel :
Physics of Semiconductor Devices, 2007. IWPSD 2007. International Workshop on
Conference_Location :
Mumbai
Print_ISBN :
978-1-4244-1728-5
Electronic_ISBN :
978-1-4244-1728-5
DOI :
10.1109/IWPSD.2007.4472654
