4:00 PM - 4:30 PM [20p-W321-7] High-yield preparation and luminescence-color control of colloidal silicon nanocrystals by pulsed-laser irradiation of porous silicon 〇Toshihiro Nakamura1, Ze Yuan2, Sadao Adachi1 (1.Gunma Univ., 2.Tsukuba Univ.)