Laser-induced gold deposition on p +-Si from liquid precursors: A study on the reduction of gold ions through competing dember and seebeck effects

Géza Tóth, Krisztián Kordás, Jouko Vähäkangas, Antti Uusimäki, Thomas F. George, L. Nánai

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Gold micropatterns are deposited from aqueous solutions of NaAuCl 4 on boron-doped Si(100) surfaces (ρ = 1.5 × 10 -4 Ω m) using a focused Ar + laser beam (TEM 00, λ = 488 nm, w 0 = 1.5 μm, 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.

Original languageEnglish
Pages (from-to)6925-6928
Number of pages4
JournalJournal of Physical Chemistry B
Volume109
Issue number15
DOIs
Publication statusPublished - Apr 21 2005

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Seebeck effect
Gold
Ions
gold
Boron
Lasers
Liquids
Surface potential
Silicon
liquids
formaldehyde
Formaldehyde
temperature profiles
surface temperature
lasers
Laser beams
Chemical reactions
chemical reactions
finite element method
ions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Laser-induced gold deposition on p +-Si from liquid precursors : A study on the reduction of gold ions through competing dember and seebeck effects. / Tóth, Géza; Kordás, Krisztián; Vähäkangas, Jouko; Uusimäki, Antti; George, Thomas F.; Nánai, L.

In: Journal of Physical Chemistry B, Vol. 109, No. 15, 21.04.2005, p. 6925-6928.

Research output: Contribution to journalArticle

Tóth, Géza ; Kordás, Krisztián ; Vähäkangas, Jouko ; Uusimäki, Antti ; George, Thomas F. ; Nánai, L. / Laser-induced gold deposition on p +-Si from liquid precursors : A study on the reduction of gold ions through competing dember and seebeck effects. In: Journal of Physical Chemistry B. 2005 ; Vol. 109, No. 15. pp. 6925-6928.
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