Nanoparticles and nanocluster materials are a new class of advanced materials exhibiting unique chemical and physical properties compared to those of their bulk materials . y2o3 : eu and gd2o3 : eu are efficient red - emission phosphor . recent studies show that they have significant promise in the field of luminescent materials 纳米材料由于其介观效应而表现出不同于常规体材料的独特物理化学性质，因而对纳米材料的合成和性质研究已经成为材料科学、物理学以及化学学科的前沿。
