title: Self-induced 1-D molecular chain growth of thiophene on Ge(100).
abstract: The adsorption of thiophene on Ge(100) has been studied using scanning tunneling microscopy (STM), high-resolution core-level photoemission spectroscopy (HRPES), and density functional theory (DFT) calculations. Until now, thiophene is known to react with the Ge(100) dimer through a [4 + 2] cycloaddition reaction at room temperature, similar to the case of thiophene on Si(100). However, we found that thiophene has two adsorption geometries on Ge(100) at room temperature, such as a kinetically favorable Ge-S dative bonding configuration and a thermodynamically stable [4 + 2] cycloaddition adduct. Moreover, our STM results show that under 0.25 ML thiophene molecules preferentially produce one-dimensional molecular chain structures on Ge(100) via the Ge-S dative bonding configuration.
authors: Department of Chemistry and School of Molecular Science (BK21), Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea.
authors: Seok Min
authors: SM
authors: Jeon
authors: Soon Jung
authors: SJ
authors: Jung
authors: Do Kyung
authors: DK
authors: Lim
authors: Hyeong-Do
authors: HD
authors: Kim
authors: Hangil
authors: H
authors: Lee
authors: Sehun
authors: S
authors: Kim