中文摘要：

采用溶剂热法合成出发光强度较高、颗粒尺寸较小的Na YF4∶Yb,Er上转换发光纳米材料.通过透射电子显微镜（TEM）、X射线衍射（XRD）、荧光光谱对上转换发光纳米材料的粒径形貌、晶体结构、发光性能进行表征.将上转换发光纳米材料应用于光滑客体表面汗潜手印的显现,考察了显现方法的对比度、灵敏度、选择性、背景颜色干扰、背景荧光干扰等因素.实验结果表明：与传统荧光粉末显现法相比,该显现方法具有对比度强、灵敏度高、选择性好、背景干扰低等优点.

英文摘要：

NaYF4 ： Yb, Er upconversion luminescent nanomaterials （ UCNMs ） with high lum inescent intensity and small size were synthesized via a solvothermal method. The size, phase, and luminescent properties of the UCNMs were characterized by transmission electron microscope （TEM）, X-ray diffraction（ XRD）, and luminescence spectroscopy. The as-prepared UCNMs were successfully used for the development of latent fingerprints on various of smooth substrates, and the developing contrast, sensitivity, selectivity, background color interference, and background fluorescence interference of the method were also studied in detail. The results showed that our method exhibited a higher contrast, higher sensitivity, higher selectivity, and lower background interface in fingerprint development, compared with the traditional powder method.