Aggregation-Induced Fluorescence Enhancement for Efficient X-ray Imaging Scintillators and High-Speed Optical Wireless Communication
Gutierrez Arzaluz, Luis
Ng, Tien Khee
Alshareef, Husam N.
Ooi, Boon S.
Mohammed, Omar F.
KAUST DepartmentPhysical Science and Engineering (PSE) Division
Electrical and Computer Engineering
Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division
Chemical Science Program
Advanced Membranes and Porous Materials Research Center
Material Science and Engineering Program
KAUST Catalysis Center (KCC)
Electrical and Computer Engineering Program
KAUST Solar Center (KSC)
Embargo End Date2023-07-29
Permanent link to this recordhttp://hdl.handle.net/10754/679990
MetadataShow full item record
AbstractAggregation of some chromophores generates very strong fluorescence signals due to the tight molecular packing and highly restricted vibrational motions in the electronically excited states. Such an aggregation-induced emission enhancement enables great strides in biomedical imaging, security screening, sensing, and light communication applications. Here, we realized efficient utilization of a series of aggregation-induced emission luminogens (AIEgens) in X-ray imaging scintillators and optical wireless communication (OWC) technology. Ultrafast time-resolved laser spectroscopic experiments and high-level density functional theory (DFT) calculations clearly demonstrate that a significant increase in the rotational energy barrier in the aggregated state of AIEgens is observed, leading to highly restricted molecular vibrations and suppressed nonradiative processes. AIEgen-based scintillators exhibit a high X-ray imaging resolution of 16.3 lp mm–1, making them excellent candidates for X-ray radiography and security inspections. In addition, these AIEgens show a broad -3-dB modulation bandwidth of ∼110 MHz and high net data rates of ∼600 Mb/s, demonstrating their high potential for application in the field of high-speed OWC.
CitationWang, J.-X., Wang, Y., Nadinov, I., Yin, J., Gutiérrez-Arzaluz, L., Alkhazragi, O., He, T., Ng, T. K., Eddaoudi, M., Alshareef, H. N., Bakr, O. M., Ooi, B. S., & Mohammed, O. F. (2022). Aggregation-Induced Fluorescence Enhancement for Efficient X-ray Imaging Scintillators and High-Speed Optical Wireless Communication. ACS Materials Letters, 1668–1675. https://doi.org/10.1021/acsmaterialslett.2c00498
SponsorsThis work was supported by the King Abdullah University of Science and Technology (KAUST). TKN and BSO acknowledge the support from the U.S. Office of Naval Research Global under award number N62909-19-1-2079 (KAUST reference number: RGC/3/4119-01-01).
PublisherAmerican Chemical Society (ACS)
JournalACS Materials Letters