[21a-P01-1~7] 1.1 応用物理一般・学際領域

▲ [21a-P01-7] Study of Luminescent Nanomaterials Based on Fluorides Activated by Cerium Ions

〇(D)Anastasiia Mikhaylovna Dorokhina^1,2、Hiroko Kominami¹、Vadim Vladimirovich Bakhmetyev²、Toru Aoki³、Hisashi Morii³ (1.Shizuoka University, Japan、2.Saint Petersburg State Institute of Technology, Russia、3.ANSeeN Inc., Japan)

キーワード：nanomaterials, luminescent materials, fluorides

A number of syntheses were carried out for samples LaF3:Ce3+ and YF3:Ce3+ (with various concentrations of cerium) were synthesized using a simple one-step hydrothermal procedure. The resulting nanocrystals have a well-crystallized orthorhombic phase and have an elongated spherical shape with a diameter of about 100 nm. Polyethylene glycol (PEG-20000) was used as a surfactant, which covers the surface of nanocrystals during synthesis and, therefore, makes nanocrystals biocompatible. The study of the luminescent properties was carried out with excitation by a xenon lamp and X-ray. Ce3+ doped nanocrystals exhibit emission in the region of 300 nm with a maximum sample intensity of 5%mol of cerium and, thus, have good potential for use as a constituent drug for photodynamic therapy [1].
Fig. 1. Photoluminescence spectra of samples YF3:Ce and LaF3:Ce with a cerium concentration of 5%mol. (λex=255 nm).
Reference:
1. Halili, F., Arboleda, A., Durkee, H., Taneja, M., Miller, D., Alawa, K. A., … Parel, J.-M. (2016). Rose Bengal– and Riboflavin-Mediated Photodynamic Therapy to Inhibit Methicillin-Resistant Staphylococcus aureus Keratitis Isolates. American Journal of Ophthalmology, 166, 194–202.