MF研究者総覧

教員活動データベース

Highly efficient NIR-NIR upconversion in K substituted CaMoO4:Tm3+,Yb3+ for potential biomedical applications

発表形態:
原著論文
主要業績:
主要業績
単著・共著:
共著
発表年月:
2015年02月
DOI:
会議属性:
指定なし
査読:
有り
リンク情報:

日本語フィールド

著者:
Hom Nath Luitel, R. Chand, T. Torikai, M. Yada, T. Watari
題名:
Highly efficient NIR-NIR upconversion in K substituted CaMoO4:Tm3+,Yb3+ for potential biomedical applications
発表情報:
RSC Advances 巻: 5 ページ: 17034-040
キーワード:
概要:
抄録:
We obtained highly efficient NIR to NIR (excitation by 980 nm, emission at 800 nm) upconversion in CaMoO4:Tm3+, Yb3+, M+ (M ¼ Li, Na, K, Rb) nanocrystals synthesized by a hydrothermal method. The XRD patterns show that they are all of tetragonal structure despite a small amount of RE3+ and M+ ion doping. The solid solubility of lithium, sodium, potassium and rubidium ions in the CaMoO4 were found to be 30 mol%, 20 mol%, 10 mol% and 5 mol%, respectively. The doped M+ ions affect the crystal field symmetry around Tm3+ ions in the CaMoO4 host, which results in the change of the irradiation transition probabilities between their transition levels and intensifies the UC intensities. Compared with CaMoO4:Tm3+, Yb3+, the NIR to NIR upconversion emission intensity of CaMoO4:Tm3+, Yb3+, 0.10M+ nanocrystals increases 2.2, 3.3, 47 and 10 fold for Li, Na, K and Rb, respectively. The K substituted CaMoO4:Tm3+, Yb3+ phosphor exhibited intense UC emission pumped by less than 1 mW laser power and can have potential application in NIR to NIR photodynamic diagnosis.

英語フィールド

Author:
Hom Nath Luitel, R. Chand, T. Torikai, M. Yada, T. Watari
Title:
Highly efficient NIR-NIR upconversion in K substituted CaMoO4:Tm3+,Yb3+ for potential biomedical applications
Announcement information:
RSC Advances Vol: 5 Page: 17034-040
An abstract:
We obtained highly efficient NIR to NIR (excitation by 980 nm, emission at 800 nm) upconversion in CaMoO4:Tm3+, Yb3+, M+ (M ¼ Li, Na, K, Rb) nanocrystals synthesized by a hydrothermal method. The XRD patterns show that they are all of tetragonal structure despite a small amount of RE3+ and M+ ion doping. The solid solubility of lithium, sodium, potassium and rubidium ions in the CaMoO4 were found to be 30 mol%, 20 mol%, 10 mol% and 5 mol%, respectively. The doped M+ ions affect the crystal field symmetry around Tm3+ ions in the CaMoO4 host, which results in the change of the irradiation transition probabilities between their transition levels and intensifies the UC intensities. Compared with CaMoO4:Tm3+, Yb3+, the NIR to NIR upconversion emission intensity of CaMoO4:Tm3+, Yb3+, 0.10M+ nanocrystals increases 2.2, 3.3, 47 and 10 fold for Li, Na, K and Rb, respectively. The K substituted CaMoO4:Tm3+, Yb3+ phosphor exhibited intense UC emission pumped by less than 1 mW laser power and can have potential application in NIR to NIR photodynamic diagnosis.


Copyright © MEDIA FUSION Co.,Ltd. All rights reserved.