| 초록 |
The phase transitions in block copolymers (BCP), like the order-to-disorder and the order-to-order transition, occur when the enthalpic term of free energy of mixing is equal to the entropic term. In thin films, interactions at the substrate/polymer and polymer/air interfaces influence this free energy balance, leading to a change in the transition behavior. Here, we report on the transition behavior of BCP thin films on a substrate modified by polymer chains that preferentially interact with one component of the BCP. The phase transitions of block copolymer has been observed in thin films by grazing-incidence technique since Grazing incidence small angle x-ray scattering (GISAXS) has recently provided the detailed analysis for the BCP films through the characteristic patterns to the corresponding nanostructures, where the target depth of films can be tuned by varying the incident angles. |
