Going beyond the surface: revealing complex block copolymer morphologies with 3D scanning force microscopy.

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Complex polymer morphologies, such as ABC triblock terpolymers, present challenges in structural characterization.
• Understanding the three-dimensional (3D) microdomain structure is crucial for predicting material properties.

Purpose of the Study:

• To demonstrate quasi in situ scanning force microscopy nanotomography as a key method for analyzing complex polymer morphologies.
• To investigate the 3D microdomain structure of polybutadiene-block-poly(2-vinyl pyridine)-block-poly(tert-butyl methacrylate) (BVT) thin films.

Main Methods:

• Utilized quasi in situ scanning force microscopy nanotomography.
• Employed controlled material erosion via low-pressure plasma etching integrated with the scanning force microscope.
• Performed 3D reconstruction of the terpolymer films.

Main Results:

• Successfully obtained detailed 3D microdomain structures of ABC triblock terpolymers.
• Revealed morphological features in very thin volume elements.
• Demonstrated the effectiveness of the nanotomography approach for complex structures.

Conclusions:

• Quasi in situ scanning force microscopy nanotomography is a powerful technique for elucidating intricate polymer nanostructures.
• The method provides unique insights into the behavior of materials at the nanoscale.
• This approach overcomes limitations of conventional characterization techniques.