Improved method for the preparation of carboxylic acid and amine terminated self-assembled monolayers of alkanethiolates
Improved method for the preparation of carboxylic acid and amine terminated self-assembled monolayers of alkanethiolates
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DOI：
10.1021/la046810w
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发表时间：
2005-03-29
期刊：
影响因子：
3.9
通讯作者：
Jiang, SY
中科院分区：
文献类型：
--
作者：
Wang, H;Chen, SF;Jiang, SY
我们提出了一种改进的方法来制备烷基硫醇酸(COOH)和胺(NH2)封端的自组装单分子膜(SAM)。在该方法中，在形成SAM的过程中，将少量的CF3COOH(对于COOHSAM)或N(CH2CH3)(3)(对于NH2-SAM)添加到烷基硫醇的乙醇溶液中。然后，分别用NH4OH或CH3COOH的乙醇溶液冲洗新形成的COOH-和NH2-SAM。通过X射线光电子能谱、原子力显微镜和接触角测试，两种方法制备的自组装膜在表面化学成分、表面粗糙度和润湿性方面都表现出较好的质量。较好的自组装膜的形成可以归因于面间氢键的破坏。
We present an improved method to prepare carboxylic acid (COOH) and amine (NH2) terminated self-assembled monolayers (SAMs) of alkanethiolates. In this method, a small amount of CF3COOH (for COOHSAM) or N(CH2CH3)(3) (for NH2-SAM) is added into the ethanolic solution of alkanethiols during SAM formation. The freshly formed COOH- and NH2-SAMs are then rinsed with an ethanolic solution of NH4OH or CH3COOH, respectively. Both SAMs prepared with the improved method show better quality in terms of surface chemical composition, roughness, and wettability as measured by X-ray photoelectron spectroscopy, atomic force microscopy, and contact angle, respectively. The formation of better SAMs can be attributed to the disruption of interplane hydrogen bonds.