Site-Selective Deposition of Magnetite Particulate Thin Films on Patterned Self-assembled Monolayers

摘要

Magnetite micropatterns were successfully fabricated by the site-selective deposition technique using self-assembled monolayers(SAMs)as templates.Magnetite particles were selectively deposited on Pd catalysts which were adsorbed to the-NH_2-terminated surface of a SAM,in an aqueous solution containing iron nitrate and dimethylamine- borane.Pd colloid catalyst particles were adhered to the amino group of a patterned SAM by electrostatic interaction.Crystalline Fe_3O_4(magnetite)particulate films were then deposited on amino-group regions by the effect of metal Pd catalyst.Site-selective deposition of crystalline Fe_3O_4 was thus realized in an aqueous solution.The deposition mechanism of Fe_3O_4 is discussed in detail in comparison with the deposition of gamma-FeOOH in the solution.