Polylactide-poly(dimethylsiloxane)-polylactide triblock copolymers as multifunctional materials for nanolithographic...

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Highly immiscible block copolymers self-assemble at nanoscale, useful for nanolithography.
• Inorganic domains in block copolymers offer etch contrast, potentially lowering costs and processing times.

Purpose of the Study:

• Explore polylactide-poly(dimethylsiloxane)-polylactide (PLA-PDMS-PLA) triblock copolymers as nanolithographic templates.
• Demonstrate their potential for creating well-ordered nanostructures and pattern transfer masks.

Main Methods:

• Thin film preparation of PLA-PDMS-PLA triblock copolymers.
• Self-assembly studies to form ordered arrays.
• Etching experiments to evaluate domain orthogonality and etch resistance.

Main Results:

• Formation of well-ordered arrays of hexagonally packed PDMS cylinders perpendicular to the substrate.
• Demonstrated orthogonal etchability of PDMS cylinders and the PLA matrix.
• Created etch-resistant domains suitable for pattern transfer masks.

Conclusions:

• PLA-PDMS-PLA triblock copolymers are effective multifunctional nanolithographic templates.
• These materials offer a pathway to cost-effective and efficient nanostructure fabrication.
• The self-assembly and etch properties facilitate pattern transfer for advanced applications.