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Silane-Based SAMs Deposited by Spin Coating as a Versatile Alternative Process to Solution Immersion
Lisa Rouvière1, Nisreen Al-Hajj1,2, Julien Hunel1
1Université Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, F-33400 Talence, France.
Langmuir : the ACS Journal of Surfaces and Colloids
|May 11, 2022
Summary
Spin coating offers a fast and effective method for creating high-quality self-assembled monolayers (SAMs) on silica surfaces. This technique rivals traditional immersion methods, providing a versatile alternative for surface functionalization and molecule immobilization.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Silane-based self-assembled monolayers (SAMs) are crucial for modifying silica surface properties.
- SAMs enable tailored surface chemistry for reactions and biomolecule immobilization.
- Conventional methods for SAM deposition include solution immersion.
Purpose of the Study:
- To synthesize novel organotrimethoxysilanes for surface functionalization.
- To compare the efficacy of spin coating versus solution immersion for SAM grafting.
- To evaluate the properties and quality of SAMs prepared by both methods.
Main Methods:
- Synthesis of four distinct organotrimethoxysilanes.
- Deposition of SAMs using spin coating and solution immersion techniques.
- Characterization of SAMs via Polarization Modulation Infrared Reflection Absorption Spectroscopy (PM-IRRAS), Atomic Force Microscopy (AFM), and contact angle measurements.
- Assessment of surface modification and reactivity, particularly for amine-terminated SAMs.
Main Results:
- Spin coating provides a versatile, rapid, and convenient alternative for SAM preparation.
- Homogeneous and robust SAMs with properties comparable to immersion-deposited SAMs were achieved via spin coating.
- PM-IRRAS and fluorescence measurements confirmed the reactivity of amine-terminated SAMs for further chemical modifications.
Conclusions:
- Spin coating is a highly effective technique for preparing high-quality silica surface functionalization with SAMs.
- This method offers significant advantages in terms of speed and convenience over traditional immersion techniques.
- The synthesized organotrimethoxysilanes and the spin coating method enable robust surface modification for diverse applications.
