Preparation and Characterization of n-Alkanoic Acid Self-Assembled Monolayers Adsorbed on 316L Stainless Steel.

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The electrochem. formation and characterization of decanoic, myristic, palmitic, and stearic acid self-assembled monolayers on a native oxide surface of 316L stainless steel were studied. This work describes a new approach to surface modification of stainless steel in which the self-assembly of n-alkanoic acids is facilitated by applying a potential to the stainless steel in an org. electrolyte soln. While decanoic acid forms a disorganized monolayer of sweeping the potential in an MeCN soln. contg. 0.1 mM of the resp. acid, longer acids, i.e., myristic and palmitic acids, form highly ordered closed-packed monolayers. This electrochem. approach results in highly reproducible monolayers that are deposited within a shorter time than the traditional assembly process. The monolayers were characterized by cyclic voltammetry, double-layer capacity (a.c. voltammetry), contact angle measurements, XPS, and external reflection-absorption FTIR spectroscopy. The use and implications of this modification technique are discussed. [on SciFinder(R)]


CAPLUS AN 2004:603193(Journal)