Effects of post annealing on ZnO microstructures grown by carbothermal reduction method - Sayson, Luce Vida A.; Sarmago, Roland V.; Empizo, Melvin John F.; Yamanoi, Kohei; Shimizu, Toshihiko; Sarukura, Nobuhiko (Proceedings of the 32nd Samahang Pisika ng Pilipinas Physics Congress, 2014)