Issue 11, 2019

Dual-mode color tuning based on upconversion core/triple-shell nanostructure

Abstract

Manipulating the upconversion (UC) emission color by externally applied fields allows access to a range of novel applications. Although such controls based on the multi-color UC nanocrystals (NCs) have previously been reported, it is still a challenge to construct a multi-mode responsive system that can enable multifunctionality within one single nanostructure. Herein, an integrated core/triple-shell nanostructure, in which the different activators are spatially separated, is applied for a dual-mode manipulation of the UC emission color. The 3-photon dominant UC emission intensity of the Tm3+ ions is enhanced more than that of the 2-photon counterpart of the Er3+ ions by increasing the excitation power, leading to an excitation power induced color variation. Moreover, the UC emission intensity of the Er3+ activators in the core exhibit a thermal quenching effect, while that of the Tm3+ ions in the second-shell show near-zero thermal quenching in the visible region, which contributes to the temperature dependent color change. Upon tuning the emission color by means of appropriate co-doping in the core, a series of power/thermal dual-mode responsive multi-color UC NCs are achieved, which endows the UC nanostructure with a bi-functionality that can find potential applications in temperature sensing and anti-counterfeiting fields.

Graphical abstract: Dual-mode color tuning based on upconversion core/triple-shell nanostructure

Supplementary files

Article information

Article type
Paper
Submitted
31 Okt. 2018
Accepted
09 Febr. 2019
First published
12 Febr. 2019

J. Mater. Chem. C, 2019,7, 3342-3350

Dual-mode color tuning based on upconversion core/triple-shell nanostructure

L. Lei, X. Dai, Y. Cheng, Y. Wang, Z. Xiao and S. Xu, J. Mater. Chem. C, 2019, 7, 3342 DOI: 10.1039/C8TC05467C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements