Y2O3:Yb3+,Er3+Upconversion Luminescence Nanoparticles in Latent Fingerprint Development
In this paper,Y2O3:Yb3+,Er3+nanoparticles were prepared by high temperature calcination.The properties of Y2O3:Yb3+,Er3+nanoparticles were studied by XRD,TEM and elemental surface scanning.The nanoparticles were successfully prepared and the nanoparticles had good dispersion and the size was 100 nm.Under the excitation of 980 nm near-infrared light,two luminous bands of green and red were produced.Based on its excellent upconversion luminescence performance and nanometer size,the application in latent fingerprint development was studies.Under the excitation of 980 nm near-infrared light,Y2O3:Yb3+,Er3+can effectively display the latent fingerprint on the surface of non-permeable objects with color interference such as red cartons and green plastic cards.Due to the excitation wavelength of near-infrared light,the interference of background fluorescence can be completely avoided,and the primary and secondary structural characteristics of fingerprints can be displayed.In addition,in the comparative study with commercial red fluorescent powder,it was found that Y2O3:Yb3+,Er3+nanoparticles had advantages in the latent fingerprint development on the surface of transmitted objects with fluorescence characteristics,showing clearer fingerprint lines,which can effectively eliminate the interference of background patterns,and latent fingerprint development performance was excellent.
NETL
NSTL
万方数据
