SEM image of (a) as produced CNT bundles and (b) a particular of a bundle. High resolution TEM image of (c) as-produced bundle and (d) CNTs.
SEM image of the carbon film at (a) low and (b) high magnification.
Raman Spectra of as-prepared CNTs and of the final carbon film recorded with a 514 nm laser excitation wavelength.
and characteristics of a CNTF in the temperature range of 4.2–420 K. The temperature was slowly decreased on a time of several hours.
and characteristics of a CNTF in the temperature range of 225–420 K.
and characteristics of a CNTF sample from the same batch of that used in the measurements of Figs. 4 and 5, slowly heated from 225 to 415 K.
CNTF conductance and temperature by a Cernox thermometer vs time for heating/cooling cycles.
CNTF conductance and temperature by a Cernox thermometer vs time evidencing the faster CNTF response.
(a) Room, (b) liquid helium, and (c) raising temperature monitored by a CNT film and solid-state thermistors.
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