Physical and electronic structure of p-sexiphenyl on Au(111)

France, C. B.; Parkinson, B. A.
February 2003
Applied Physics Letters;2/24/2003, Vol. 82 Issue 8, p1194
Academic Journal
The electronic structure, adsorption energies, and molecular ordering of p-sexiphenyl (p-6P) films on Au(111) have been investigated with ultraviolet photoemission spectroscopy, temperature programmed desorption (TPD), and scanning tunneling microscopy (STM). Films up to 50 Ã… of p-6P were studied and a substantial interface dipole was measured (0.73 Ev). Two distinct p-6P binding environments with heats of adsorption of 126 and 143 kJ/mol were observed using TPD. An unusual surface structure that contains alternating face and edge-on p-6P molecules was observed using STM. A model similar to the bulk p-6P structure with alternating face and edge-on interactions is proposed.


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