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Patterned Diblock Co-Polymer Thin Films as Templates for Advanced Anisotropic Metal Nanostructures
Stephan V Roth1, Gonzalo Santoro1, Johannes F H Risch1
1†Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, Germany.
ACS Applied Materials & Interfaces
|January 31, 2015
Summary
We fabricated directional hierarchical gold nanostructures on polymer films using glancing-angle deposition. This method controls gold nanoparticle growth for applications in nanoantennas and sensors.
Area of Science:
- Materials Science
- Nanotechnology
- Optics
Background:
- Diblock copolymers offer tunable nanostructures.
- Controlling nanoparticle growth is key for advanced materials.
Purpose of the Study:
- To fabricate directional hierarchical structures using gold deposition on diblock copolymers.
- To understand the growth mechanisms of gold nanoparticles.
- To investigate the optical properties of the resulting hybrid materials.
Main Methods:
- Glancing-angle deposition of gold onto polystyrene-block-poly(methyl methacrylate) thin films.
- In situ scattering methods to analyze nanoparticle growth.
- Angular resolved spectroscopic methods to probe optical anisotropy.
Main Results:
- Selective wetting of gold on polystyrene enabled asymmetric growth.
- Different growth laws for gold nanoparticles were extracted.
- Optical anisotropy was observed in the hierarchical hybrid materials.
Conclusions:
- Glancing-angle deposition on nanostructured polymers is effective for creating tailored hierarchical layers.
- The fabricated materials have potential applications in nanoantennas, organic photovoltaics, and sensor electronics.
