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Using Polystyrene-block-poly(acrylic acid)-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
Published on: July 9, 2015
Memory effects in annealed hybrid gold nanoparticles/block copolymer bilayers
Vanna Torrisi1, Francesco Ruffino, Antonino Licciardello
1Laboratory for Molecular Surfaces and Nanotechnology (LAMSUN), Department of Chemical Sciences, University of Catania and CSGI, Viale A, Doria 6, 95125, Catania, Italy. vanna.torrisi@gmail.com.
Nanoscale Research Letters
|June 30, 2011
Summary
Self-assembled block copolymer films template gold nanoparticles (NPs) organization. Annealing treatments reveal a memory effect influencing NP distribution and film morphology, crucial for nanomaterial design.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Science
Background:
- Block copolymers self-assemble into ordered nanostructures.
- Langmuir-Blodgett (LB) methods enable thin film deposition.
- Nanoparticle self-organization is key for advanced materials.
Purpose of the Study:
- Investigate gold nanoparticle (Au NP) self-organization on block copolymer films.
- Analyze the impact of annealing on NP distribution and film morphology.
- Explore the templating capability of phase-separated polymer films.
Main Methods:
- Horizontal precipitation Langmuir-Blodgett (HP-LB) for film deposition.
- Atomic Force Microscopy (AFM) for nanoscale morphology.
- Time of Flight Secondary Ion Mass Spectrometry (TOF-SIMS) for surface composition.
- Annealing treatments above the glass transition temperature (Tg).
Main Results:
- Phase-separated poly-n-butylacrylate-block-polyacrylic acid (PnBuA-b-PAA) films templated Au NPs.
- Annealing induced a memory effect, altering NP distribution on polar domains.
- AFM phase response of Au NPs layer was modified without changing surface composition.
- Enhanced polymer chain mobility influenced nanoparticle organization.
Conclusions:
- Block copolymer films effectively template nanoparticle arrays.
- Annealing-induced polymer chain mobility significantly impacts nanoparticle organization.
- A unique memory effect influences the nanoscale morphology of hybrid organic-inorganic films.
