Ju Young Lee, Jongwoon Shin, Kyubeen Kim, Jeong Eun Ju (First author) and Professor Ki Jun Yu (Corresponding author), have successfully developed ultrathin crystalline silicon nano and micro membranes with high areal density for low-cost flexible electronics and manufactured solar cell and transistor arrays for demonstrating the applicability of this technique to various flexible electronic devices. The research was published in Small (IF 15.153), a leading international academic journal in the field of applied physics.