制备羧酸和胺端基烷硫醇自组装单分子层的改进方法。

Improved method for the preparation of carboxylic acid and amine terminated self-assembled monolayers of alkanethiolates.

作者信息

Wang Hua, Chen Shengfu, Li Lingyan, Jiang Shaoyi

机构信息

Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, USA.

出版信息

Langmuir. 2005 Mar 29;21(7):2633-6. doi: 10.1021/la046810w.

DOI:10.1021/la046810w

PMID:15779923

Abstract

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 COOH-SAM) 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.

摘要

我们提出了一种改进的方法来制备羧酸（COOH）和胺（NH₂）封端的链烷硫醇自组装单分子层（SAMs）。在该方法中，在SAM形成过程中，将少量的CF₃COOH（用于COOH-SAM）或N(CH₂CH₃)₃（用于NH₂-SAM）添加到链烷硫醇的乙醇溶液中。然后分别用NH₄OH或CH₃COOH的乙醇溶液冲洗新形成的COOH-SAM和NH₂-SAM。通过X射线光电子能谱、原子力显微镜和接触角分别测量，用改进方法制备的两种SAM在表面化学成分、粗糙度和润湿性方面均表现出更好的质量。更好的SAM的形成可归因于平面间氢键的破坏。