Formation of order molecular nanostructures on the Si(111)-(7x7) surface by patterned assembly

摘要

The well-defined and patterned copper clusters formed on the Si(111)-(7x7) surface have been employed as a template for selective binding of molecules, forming ordered molecular nanostructures. Scanning tunneling microscopic studies show that thiophene molecules preferentially bind to the copper clusters through the S-Cu interaction involving S lone-pair electrons. Large-scale two-dimensional thiophene molecular nanostructures can be obtained using this patterned assembly technique. Our experiments demonstrate the feasibility for controllable growth of ordered molecular nanostructures on Si(111) surface. (C) 2004 American Institute of Physics.