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Updated: Feb 19, 2026
08:09
A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates
Published on: May 9, 2014
11.5K
Ethanol-Assisted Alkanethiol Self-Assembled Monolayer Disruption by Mobile Siloxane Oligomers for Precise Galvanic
Yu-Ling Tu1, Chia-Li Liao1, Elmer Ismael Guerra1
1Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
ACS Applied Materials & Interfaces
|February 17, 2026
Summary
Siloxane oligomers are controllably transferred from elastomers to disrupt alkanethiol monolayers on gold surfaces. This controlled disruption enables precise metal feature transfer and enhances fluorescence for bioimaging applications.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Low molecular weight siloxane oligomers in polymers pose challenges due to unpredictable mobility and surface contamination.
- Controlling siloxane oligomer behavior is crucial for developing advanced functional substrates.
Purpose of the Study:
- To present an unconventional method for controlled siloxane oligomer transfer and self-assembled monolayer (SAM) disruption.
- To explore the application of SAM disruption for creating patterned metal surfaces and enhancing fluorescence.
Main Methods:
- Utilizing ethanol-mediated transport of siloxane oligomers from elastomers to alkanethiol-functionalized gold (Au).
- Employing conformal contact sealing to facilitate siloxane oligomer diffusion and SAM disruption.
- Characterizing SAM disruption and Au-thiolate detachment using sum frequency generation vibrational spectroscopy and X-ray photoelectron spectroscopy.
Main Results:
- Demonstrated controllable diffusion and disruption of alkanethiol SAMs by siloxane oligomers.
- Identified key parameters influencing SAM disruption, including contact duration, oligomer chain length, and terminal group functionality.
- Showcased the ability to create patterned metal surfaces, enable selective galvanic replacements for bimetallic substrates, and enhance fluorescence emission.
Conclusions:
- The developed method offers precise control over SAM disruption and subsequent surface modification.
- The resulting bimetallic interfaces and patterned substrates are suitable for advanced bioimaging and detection platforms.
- This approach provides a reliable platform for ratiometric analysis in bioimaging.
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