Abstract
The stability of phosphonic acid self-assembled monolayers (SAMs) in water was studied on aluminum surfaces. The aim was to understand the stability of SAMs under the practical conditions that are relevant to various applications. After exposing the as-prepared alkyl- and fluoroalkyl-SAM surfaces to water at 40 °C for 2 h, the contact angle decreased from more than 100° to less than 20°. Thermally annealed SAMs showed larger water contact angles after exposing to water, indicating that the desorption of the molecules was depressed.
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