Work function of carbon nanotubes

Thermionic emission properties of novel carbon nanostructures.

“…The values of ϕ obtained by thermionic emission method [32,33] (Table 3.3) are consistent with the theoretical predictions [20][21][22] (Table 3.1) and roughly agree with photoelectron emission (PEES) measurements [25] (Table 3.2).…”

“…Photoelectron emission study of the SWNT "bucky paper" and MWNT (grown by arc discharge from the graphite rods) carried out by Shiraishi et al [25] showed that value of the work function of the both single-and multiwall carbon nanotubes, 5.05 eV and 4.95 eV respectively, are larger than for the high oriented pyrolitic graphite (HOPG):…”

“…For measurements, samples were prepared using 2 cm long yarns with diameter of 20-30 microns with ends attached to the electrodes. An Mo plate served as the anode as was placed in front of the angle shaped MWNT yarn, which served as cathode -this is reffered to as simple vauum diode configuration ( [25] (ch. 2, page 37), [18]).…”

“…There has been a wealth of results on experimental measurements (by different methods and theoretical calculations of the work function of carbon nanotubes [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. We will present some of the reported results on work function values of the carbon nanotubes, first by shortly discussing various methods such as photoelectron emission (PEE), photoemission electron microscopy (PEEM) ultraviolet photoelectron spectroscopy (UPS) and contact potential difference (CPD).…”

Tunneling-Current-Induced Light Emission from Copper Phthalocyanine Thin Films

“…One is that the hole injection efficiency of Au(111) is better than that of HOPG. This is because the work function of Au(111) (∼ 5.3 eV) [15] is higher than that of HOPG (∼ 4.8 eV) [16]. The large work function leads to the high hole injection efficiency into organic thin films [17].…”