期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 133, 期 30, 页码 11810-11815出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja204504w
关键词
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资金
- French National Agency (ANR) [ANR-08-NANO-025]
Focusing on the use of nanophosphors for in vivo imaging and diagnosis applications, we used thermally stimulated luminescence (TSL) measurements to study the influence of trivalent lanthanide Ln(3+) (Ln = Dy, Pr, Ce, Nd) electron traps on the optical properties of Mn(2+)-doped diopside-based persistent luminescence nanoparticles. This work reveals that Pr(3+) is the most suitable Ln(3+) electron trap in the diopside lattice, providing optimal trap depth for room temperature afterglow and resulting in the most intense luminescence decay curve after X-ray irradiation. This luminescence dependency toward the electron trap is maintained through additional doping with Eu(2+), allowing UV-light excitation, critical for bioimaging applications in living animals. We finally identify a novel composition (CaMgSi(2)O(6):Eu(2+),Mn(2+),Pr(3+)) for in vivo imaging, displaying a strong near-infrared afterglow centered of such persistent luminescence nanoparticles in mice allows not only on 685 nm, and present evidence that intravenous injection improved but highly sensitive detection through living tissues.
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