Bright, water-soluble CeF3 photo-, cathodo-, and X-ray luminescent nanoparticles

被引：13

作者：

Clement, Sandhya ^{[1
]}

Deng, Wei ^{[1
]}

Drozdowicz-Tomsia, Krystyna ^{[1
]}

Liu, Deming ^{[1
]}

Zachreson, Cameron ^{[2
]}

Goldys, Ewa M. ^{[1
]}

机构：

[1] Macquarie Univ, Dept Phys & Astron, Ctr Nanoscale BioPhoton, Sydney, NSW 2109, Australia

[2] Univ Technol Sydney, Sch Phys & Adv Mat, Ultimo, NSW 2007, Australia

来源：

JOURNAL OF NANOPARTICLE RESEARCH | 2015年 / 17卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

Water soluble; Photostable; Quantum yield; X-ray luminescence; Cathodoluminescence; CERIUM FLUORIDE; SCINTILLATION MECHANISMS; FACILE SYNTHESIS; QUANTUM YIELD; FLUORESCENCE; RADIATION; CE3+;

D O I：

10.1007/s11051-014-2833-0

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Bright, water-soluble CeF3 nanoparticles with small size and narrow size distribution have been synthesized using a simple co-precipitation method without any ligands. Size control of nanoparticles from 13 +/- 2 to 9 +/- 2 nm was achieved by varying the reaction time. Colloidal properties have been found to vary with pH and, independently, with dilution. The photoluminescence of the as-synthesized nanoparticles shows a highly photostable UV/Visible fluorescence band due to allowed 5d-4f transitions, also observed in the X-ray luminescence spectrum. This band is suitable for X-ray excitation of a range of photosensitizers. The photoluminescence quantum yield of nanoparticles was also determined to be 31 %. Using the measured fluorescence decay time of 25 ns, the radiative lifetime of Ce in CeF3 was found to be 80.6 ns. Both photoluminescence and cathodoluminescence emission are affected by the reaction time and measurement temperature. Electron-beam-induced defect annealing is also observed.

引用

页数：9

共 42 条

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