It is shown that a large temperature difference between the emitting surface and the substrate exists in the case of field emission of electrons from nanosize carbon structures. This makes it possible to explain small values of the effective electron work function in the case of field emission from such structures.
Bibliographical noteFunding Information:
ACKNOWLEDGMENTS The authors thank V.G. Pavlov for fruitful discussions. This study was supported by the Federal Research Agency, project NSh-9085.206.2 (contract no. 2.06-RI-112.0/001/043).