Shustak Galit, Domb Abraham J, Mandler Daniel
Department of Inorganic and Analytical Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
Langmuir. 2004 Aug 31;20(18):7499-506. doi: 10.1021/la036470z.
The electrochemical formation and characterization of decanoic, myristic, palmitic, and stearic acid self-assembled monolayers on a native oxide surface of 316L stainless steel have been 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 organic electrolyte solution. While decanoic acid forms a disorganized monolayer as a result of sweeping the potential in an acetonitrile solution containing 0.1 mM of the respective acid, longer acids, that is, myristic and palmitic acids, form highly ordered closed-packed monolayers. This electrochemical 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 (ac voltammetry), contact angle measurements, X-ray photoelectron spectroscopy, and external reflection-absorption Fourier transform infrared spectroscopy. The utilization and implications of this modification technique are discussed.
研究了癸酸、肉豆蔻酸、棕榈酸和硬脂酸在316L不锈钢原生氧化物表面的电化学形成及表征。这项工作描述了一种不锈钢表面改性的新方法，即在有机电解质溶液中对不锈钢施加电势，促进正构烷酸的自组装。在含有0.1 mM相应酸的乙腈溶液中扫描电势时，癸酸形成无序单层，而较长链的酸，即肉豆蔻酸和棕榈酸，则形成高度有序的紧密堆积单层。这种电化学方法能产生高度可重复的单层膜，且沉积时间比传统组装过程短。通过循环伏安法、双层电容（交流伏安法）、接触角测量、X射线光电子能谱和外反射吸收傅里叶变换红外光谱对单层膜进行了表征。讨论了这种改性技术的应用及意义。
