Figure 4.

SEM morphologies of C116 PS-b-P2VP after ordering at the maximum laser power (27 W) with corresponding FFT circular average plots. (a) After 8 cycles of laser passage at a base temperature of 60 °C and (b) displaying symptoms of thermal degradation after 32 cycles at 90 °C. Laser line velocity was 0.32 mm s^–1. The images show a metalized (Pt) replica of the minority P2VP domains. The insets show FFTs with calculated orientational order parameter (η) values. In circularly averaged plots q₀ indicates the primary peak position in the FFT and d₀ is a corresponding real-space periodicity.