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Published on: November 19, 2018
Patterned poly(2-hydroxyethyl methacrylate) brushes on silicon surfaces behave as "tentacles" to capture ferritin
Jem-Kun Chen1, Zong-Yan Chen, Han-Ching Lin
1Department of Polymer Engineering, National Taiwan University of Science and Technology, 43, Sec 4, Keelung Rd, Taipei 106, Taiwan. jkchen@mail.ntust.edu.tw
ACS Applied Materials & Interfaces
|April 2, 2010
Summary
Researchers created patterned polymer brushes using 2-hydroxyethyl methacrylate (HEMA) on silicon surfaces. These poly(2-hydroxyethyl methacrylate) (PHEMA) brushes effectively captured ferritin proteins, leaving patterned iron cores after removal.
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Patterned polymer brushes are crucial for advanced surface engineering.
- Controlled polymerization techniques are needed to create functional surface architectures.
- Biomolecule immobilization on surfaces is key for biosensors and diagnostics.
Purpose of the Study:
- To develop a method for creating well-defined patterns of poly(2-hydroxyethyl methacrylate) (PHEMA) brushes on silicon surfaces.
- To investigate the conformational behavior of PHEMA brushes in different solvents.
- To demonstrate the ability of PHEMA brushes to capture ferritin complexes and create patterned iron cores.
Main Methods:
- Utilized very large scale integration (VLS I) processes for surface patterning.
- Employed atom transfer radical polymerization (ATRP) for graft polymerization of HEMA.
- Investigated polymer conformation in water and cyclohexane using microscopy.
- Analyzed captured ferritin using high-resolution scanning electron microscopy (HR-SEM).
Main Results:
- Successfully generated patterned PHEMA brushes on Si(100) surfaces with varying resolutions.
- Observed distinct brush-like and mushroom-like morphologies depending on solvent immersion (water vs. cyclohexane).
- Demonstrated effective capture of ferritin complexes via entanglement with PHEMA brushes.
- Revealed patterned ferritin iron cores on the silicon surface post-polymer and protein removal.
Conclusions:
- Patterned PHEMA brushes can be controllably fabricated on silicon surfaces.
- PHEMA brushes exhibit solvent-dependent conformational changes, influencing their interaction with biomolecules.
- This technique offers a novel approach for creating patterned biomaterial assemblies and nanostructures.
