The structures induced by platinum (Pt) adsorption on Si(1 1 0) surface have been studied by scanning tunneling microscopy (STM) for coverage up to 2 monolayers (ML). Three surface phases have been found to form: ''5 x 4'', ''13 x 2'' and ''6 x 5'' for Pt coverages 0.3, 0.5 and 1 ML respectively. All structures are formed by one- dimensional rows aligned along the [110] direction. At the coverage > 1 ML islands of, probably, Pt silicide start to form in form of 1D nanowires. (c) 2008 Elsevier B.V. All rights reserved.