Surface conduction at phase transitions in (Au,Ag)/Si(1Â 1Â 1) submonolayer films

► Structural reordering occurs upon Ag adsorption onto Si(1 1 1)α-√3 × √3-Au surface phase at 350 °C. ► The new surface structure identified as Si(1 1 1)√93 × √93-(Au,Ag) has been found by LEED and STM. ► Electrical conductivity of various (Au,Ag)/Si(1 1 1) nanostructures has been characterized.