UPS studies of OPCOT on Ru (0001)

作者：Lu B^*; Lu P; Shi SL; Zhang JH; Tang JX; Lou H; He PM; Bao SN

来源：Acta Physica Sinica, 2002, 51(11): 2644-2648.

• OPCOT
• UPS
• valence band
• desorption

The electronic structures and the interaction at the interface between octaaryl-cyclooctatetrene (OPCOT) and Ru (0001) surface have been studied by ultraviolet photoelectron spectroscopy. The peaks at 4.3, 6.9, 9.3 and 11.4eV below the Fermi level are attributed to the pi(CC), sigma(CC), sigma(CH), and sigma(HH) orbits in the phenyls of OPCOT, respectively, and the peak at 3.0eV below the Fermi level is attributed to the C-C band with 71 characteristic orbit derived from OPCOT containing eight phenyls. The top of the valence band of OPCOT material is at 2.5 ev below Fermi level, the energy gap for OPCOT material can be larger than 2.5eV. The work function of OPCOT on Ru (0001) surface was obtained, which is 3.95 eV, less than that of clean Ru (0001) surface (4.2eV). The OPCOT material can be adsorbed on Ru (0001) surface stably below 150degreesC and starts desorption with further annealing.

• 出版日期2002-11
• 单位浙江大学