Search

We present a low-temperature scanning tunneling microscopy investigation revealing the formation of a long range ordered α-sexithiophene (6T) monolayer nanostripe array on highly ordered pyrolytic graphite, with thiophene ring units oriented parallel to the surface. The 6T monolayer nanostripe is an effective molecular nanotemplate for the assembly of an ordered “zigzag” C60 chain array, accompanied by a slight structural modification of the underlying 6T nanostripes due to donor-acceptor intermolecular interactions between 6T and C60 molecules. [ABSTRACT FROM AUTHOR]

Abstract: The adsorption of S2 on the Si(111)-(7×7) surface and the interaction of copper and sulfur on this sulfur-terminated Si(111) surface have been studied using synchrotron irradiation photoemission spectroscopy and scanning tunneling microscopy. The adsorption of S2 at room temperature results in the passivation of silicon dangling bonds of Si(111)-(7×7) surface. Excessive sulfur forms S n species on the surface. Copper atoms deposited at room temperature directly interact with S-adatoms through the formations of Cu–S bonds. Upon annealing the sample at 300°C, CuS x nanocrystals were produced on the sulfur-terminated Si(111) surface. [Copyright &y& Elsevier]