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

Hua Wang; Shengfu Chen; Lingyan Li; Shaoyi Jiang

doi:10.1021/la046810w

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

Hua Wang, Shengfu Chen, Lingyan Li, Shaoyi Jiang

Biochemistry

Research output: Contribution to journal › Article › peer-review

232 Scopus citations

Abstract

We present an improved method to prepare carboxylic acid (COOH) and amine (NH ₂) terminated self-assembled monolayers (SAMs) of alkanethiolates. In this method, a small amount of CF ₃COOH(for COOH-SAM) or N(CH ₂CH ₃) ₃ (for NH ₂-SAM) is added into the ethanolic solution of alkanethiols during SAM formation. The freshly formed COOH- and NH ₂-SAMs are then rinsed with an ethanolic solution of NH ₄OH or CH ₃COOH, 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.

Original language	English (US)
Pages (from-to)	2633-2636
Number of pages	4
Journal	Langmuir
Volume	21
Issue number	7
DOIs	https://doi.org/10.1021/la046810w
State	Published - Mar 29 2005

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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title = "Improved method for the preparation of carboxylic acid and amine terminated self-assembled monolayers of alkanethiolates",

abstract = "We present an improved method to prepare carboxylic acid (COOH) and amine (NH 2) terminated self-assembled monolayers (SAMs) of alkanethiolates. In this method, a small amount of CF 3COOH(for COOH-SAM) or N(CH 2CH 3) 3 (for NH 2-SAM) is added into the ethanolic solution of alkanethiols during SAM formation. The freshly formed COOH- and NH 2-SAMs are then rinsed with an ethanolic solution of NH 4OH or CH 3COOH, 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.",

author = "Hua Wang and Shengfu Chen and Lingyan Li and Shaoyi Jiang",

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T1 - Improved method for the preparation of carboxylic acid and amine terminated self-assembled monolayers of alkanethiolates

AU - Wang, Hua

AU - Chen, Shengfu

AU - Li, Lingyan

AU - Jiang, Shaoyi

PY - 2005/3/29

Y1 - 2005/3/29

N2 - We present an improved method to prepare carboxylic acid (COOH) and amine (NH 2) terminated self-assembled monolayers (SAMs) of alkanethiolates. In this method, a small amount of CF 3COOH(for COOH-SAM) or N(CH 2CH 3) 3 (for NH 2-SAM) is added into the ethanolic solution of alkanethiols during SAM formation. The freshly formed COOH- and NH 2-SAMs are then rinsed with an ethanolic solution of NH 4OH or CH 3COOH, 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.

AB - We present an improved method to prepare carboxylic acid (COOH) and amine (NH 2) terminated self-assembled monolayers (SAMs) of alkanethiolates. In this method, a small amount of CF 3COOH(for COOH-SAM) or N(CH 2CH 3) 3 (for NH 2-SAM) is added into the ethanolic solution of alkanethiols during SAM formation. The freshly formed COOH- and NH 2-SAMs are then rinsed with an ethanolic solution of NH 4OH or CH 3COOH, 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.

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JO - Langmuir

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

Abstract

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