Improved ultrafast free-excitonic luminescence of ZnO microcrystals grown by carbothermal reduction method - Vargas, Ray; Yamanoi, Kohei; Cadatal-Raduban, Marilou; Sarmago, Roland; Shimizu, Toshihiko; Sarukura, Nobuhiko (Proceedings of the 29th Samahang Pisika ng Pilipinas National Physics Congress, 2011)