稀土掺杂Ba_(2)GdF_(7)纳米材料的合成和温度传感性能

The synthesis and temperature sensing properties of rare-earth doped Ba_(2)GdF_(7) nanomaterials

PEG-Ba_(2)GdF_(7):Yb^(3+),Er^(3+)已成为一种重要的稀土掺杂上转换纳米材料,不过其在温度传感领域应用的可能性尚需进一步研究。采用水解法制备PEG-Ba_(2)GdF_(7):Yb^(3+),Er^(3+)纳米材料,通过改变氟源以及PEG的修饰与否,研究了该纳米材料的光学性质,并探究了其在温度传感领域的应用潜力。结果发现:NaF作为氟源制备的PEG-Ba_(2)GdF_(7):Yb^(3+),Er^(3+)纳米材料具有最佳的发光效果,并且在303~373 K范围内,该纳米材料的相对灵敏度(S_(r))可达1.12%K^(-1),高于同领域多数研究。因此,该纳米材料有望成为一种新型的无创纳米温度计,在细胞和生物医学温度传感领域具有广泛的前景。

PEG-Ba_(2)GdF_(7):Yb^(3+),Er 3+has become an important rare-earth nanomaterial in the development of rare-earth doped upconversion nanomaterials,while,the possibility of its application in the field of temperature sensing needs further study.PEG-Ba_(2)GdF_(7):Yb^(3+),Er^(3+)nanomaterials were prepared by hydrothermal method.The effects of fluoride source and PEG on the optical properties of the nanomaterials were investigated by changing the fluoride source and the modification of PEG.Besides,the potential of its application in the field of temperature sensing was also studied.The results show that PEG-Ba_(2)GdF_(7):Yb^(3+),Er^(3+)nanomaterial prepared by NaF as fluorine source shows the best luminescence effects,and the relative sensitivity(S_(r))of the nanomaterial can reach 1.12%K^(-1)in the range of 303~373 K,which is higher than most studies in this field.Therefore,this nanomaterial shows good potential as a new type of non-invasive nano thermometer,which presents broad prospects in the field of cell and biomedical temperature sensing.