journal article·2024-10-11

Lanthanide-Metal-Doped Light-Harvesting Quantum Dots for Exceptional X-ray Imaging Scintillators

Xin Zhu, Renqian Zhou, Zhi Wang, Simil Thomas, Partha Maity, Luis Gutiérrez-Arzaluz, Wentao Wu, Tulai Sun, Tian Jin, Haiting Cai, Jian-Xin Wang, Husam N. Alshareef, Osman M. Bakr, Yihan Zhu, Omar F. Mohammed

ACS Energy Letters· Volume 9· Issue 10
Publisher page

Abstract

The energy donor’s superlative antenna effect efficiently improves the performance of the reaction centers of light-harvesting systems. Consequently, we successfully leveraged this exceptional capability to develop high-performance X-ray imaging scintillator screens. Electron microscopy imaging with atomic-level resolution and theoretical calculations have revealed that within lanthanide-ion-doped CaMoO 4 (Ln 3+ –CaMoO 4, Ln = Eu or Tb) quantum dots (QDs), Ln 3+ is uniformly distributed throughout the CaMoO 4 lattice. The synergy between Ln 3+ and CaMoO 4 QDs amplifies the X-ray photon absorption capacities and enables efficient energy transfer from the CaMoO 4 QD antenna to the Ln 3+ emission center, significantly enhancing the X-ray sensitivity and imaging resolution of QD screens. To illustrate, the CaMoO 4:(Eu 3+ ) 0.20 QD screens exhibit an impressive X-ray imaging resolution, exceeding 23 lp/mm, outperforming most recognized organic and conventional inorganic scintillators. These findings can position doped QDs as promising scintillators for X-ray imaging with potential application in medical radiology and security screening.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Atomic and Subatomic Physics Research · Radiation Detection and Scintillator Technologies · Medical Imaging Techniques and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Advanced Membranes and Porous Materials Center, Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia

KAUST Catalysis Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia

Center for Electron Microscopy, Institute for Frontier and Interdisciplinary Sciences, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China

Materials Science and Engineering, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia

Funding

National Key Research and Development Program of China · King Abdullah University of Science and Technology · National Natural Science Foundation of China

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