| 초록 |
We prepared high-density nanopatterns on baropastic polymer, polystyrene-block-poly(n-pentyl methacrylate) copolymer (PS-b-PnPMA), by using atomic force microscope (AFM) at room temperature. Because of baroplastic properties which enable the nanophase transition of block copolymers at relatively lower pressure and temperature, nanopatterns were easily fabricated by the indentation at room temperature. To confirm the mechanism on the nanopattern formation, the inner structure of patterned thin film was observed by transmission electron microscopy (TEM) after it was cut by focused ion beam (FIB). For application of data storage media, we can convert the depth of nanopattern to electric signal (0 or 1 as binary digits) by using piezoelectric sensing method. In addition, the write-read-erase-re-write process was possible without thermal degradation of polymeric film. The array of nanopatterns presented in this study could be used for ultrahigh density data storage media. |
