Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 24, Pages 28230-28238Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c06097
Keywords
persistent luminescent nanoparticles; time-gated imaging; latent fingerprint imaging; NaLuF4 nanoparticles; surface modification
Funding
- National Natural Science Foundation of China [52172156, 51872247, 51832005]
- Fundamental Research Funds for the Central Universities [20720200075, 2021G2262]
- Young Elite Scientists Sponsorship Program by China Association for Science and Technology [2018QNRC001]
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This work developed NaLuF4:Mn nanoparticles with intense green persistent luminescence and functionalized surfaces, enabling time-gated imaging of latent fingerprints with Level 3 details and improving the accuracy of fingerprint imaging.
The discovery of X-ray-charged persistent luminescence (PersL) in fluoride nanoparticles enables these materials to emit photons without real-time excitation, which provides a great possibility for the development of new luminescent nanotechnologies. In this work, we developed NaLuF4:Mn nanoparticles with intense green PersL and functionalized surfaces and accordingly achieved time-gated imaging of latent fingerprints (LFPs) with Level 3 details. These surface-modified NaLuF4:Mn nanoparticles exhibited near-spherical morphology, long-lasting emission for several hours, appropriate trap depth distribution, and tight chemical bonding with amino acids from fingerprints, thus greatly improving the accuracy of LFP imaging in a variety of environments. The developed NaLuF4:Mn PersL nanoparticles are expected to find broad applications in the fields of LFP imaging and in vivo biological imaging.
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