Metal sulfide and metal oxide nanostructures on Au(111): synthesis and properties

COLL 75

Cynthia M. Friend1, Juergen Biener2, Monika Biener2, Dae-Hyuk Kang3, Xingyi Deng3, Su Ying Quek4, and Efthimios Kaxiras4. (1) Department of Chemistry & Division of Engineering and Applied Sciences, Harvard University, 12 Oxford St, Cambridge, MA 02138, (2) Department of Chemistry & Division of Engineering & Applied Sciences, Harvard University, 12 Oxford Street, Cambridge, MA 02138, (3) Department of Chemistry, Harvard University, 12 Oxford St, Cambridge, MA 02138, (4) Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
The synthesis and characterization of nanoscale metal sulfides and oxides on a Au(111)-“herringbone” template will be reported. Nanostructures of TiS2, TiO2, MoS2, and MoO3 have been synthesized and studied using scanning tunneling microscopy (STM). These materials are of potential interest as chemical sensors and in heterogeneous catalysis. X-ray photoelectron and high resolution electron energy loss spectroscopy has also been used to study the bonding and thermal stability of some of these materials. Density functional theory calculations have been used to understand the electronic properties. These studies provide a guidelines for the formation of self-assembled nanostructures on a substrate.