title: Laser-induced gold deposition on p+-Si from liquid precursors: a study on the reduction of gold ions through competing Dember and Seebeck effects.
abstract: Gold micropatterns are deposited from aqueous solutions of NaAuCl(4) on boron-doped Si(100) surfaces (rho = 1.5 x 10(-4) Omega m) using a focused Ar(+) laser beam (TEM(00), lambda = 488 nm, w(0) = 1.5 mum, P = 20-80 mW). The finite-element method employed for computing the surface temperature profiles reveals that the maximum temperature at the precursor/silicon interface increases only to the range 316-372 K, which is not high enough for chemical reactions with formaldehyde in the precursor. This suggests a different mechanism to be responsible for the reduction of gold ions, namely, changes in the surface potential of Si caused by the Dember and Seebeck effects.
authors.affiliation: Microelectronics and Materials Physics Laboratories, University of Oulu, P.O. Box 4500, FIN-90570, Oulu, Finland.
authors.forename: Géza
authors.initials: G
authors.lastname: Tóth
authors.forename: Krisztián
authors.initials: K
authors.lastname: Kordás
authors.forename: Jouko
authors.initials: J
authors.lastname: Vähäkangas
authors.forename: Antti
authors.initials: A
authors.lastname: Uusimäki
authors.forename: Thomas F
authors.initials: TF
authors.lastname: George
authors.forename: Laszló
authors.initials: L
authors.lastname: Nanai