Optical changes and writing on hydrotalcite supported gold nanoparticles - Bonifacio, Leonardo S; Gordijo, Claudia R; Constantino, Vera Regina Leopoldo; Silva, Denise de Oliveira; Kiyohara, Pedro Kunihiko; Araki, Koiti; Toma, Henrique Eisi (Journal of Nanoscience and Nanotechnology, 2008)