Jump to main content
Jump to site search


Water Detecting through Nd3+-Sensitized Photon Upconversion in Core-Shell Nanoarchitecture

Abstract

A strategy to achieve 808 nm excitable water probe based on Nd3+-sensitized core–shell upconversion nanoarchitecture was provided. Specifically, the fabricated Yb/Er: NaGdF4@Yb/Nd: NaYF4 active-core@active-shell nanocrystals were demonstrated to significantly enhance Er3+ blue, green and red upconversion emissions with the assistance of spatially confined separation between Nd3+ sensitizers and Er3+ activators and efficient energy transfer/migration of Nd3+→ Yb3+(shell)→Yb3+(core)→Er3+. To understand the exact mechanisms for water detecting, core, core-shell and core-shell-shell samples were prepared and the related water-content dependent upconversion emission and decay behaviors under 980 nm and 808 nm laser excitation were systematically investigated. Different to the case of Yb/Er: NaGdF4 core, the Nd3+-sensitized core-shell product can efficiently avoid excitation attenuation (i.e., absorption of incident laser) and show two-separated linearity with logarithm of H2O content at low-water-content and high-water-content intervals, respectively, owing to the combined role of Yb3+ excited-state quenching and Er3+ excited-state quenching. It is expected that this study could provide insights into the design of upconversion nanoparticle based water sensors.

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 31 Mar 2017, accepted on 11 May 2017 and first published on 11 May 2017


Article type: Paper
DOI: 10.1039/C7TC01373F
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
  •   Request permissions

    Water Detecting through Nd3+-Sensitized Photon Upconversion in Core-Shell Nanoarchitecture

    D. Chen, M. Xu, P. Huang, M. Ma, M. Ding and L. Lei, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC01373F

Search articles by author