English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Pro

Presents the zaia usage as premium feature

ZAIA

Presents AI Discovery search usage as a premium feature

AI Discovery

Presents AI Discovery explain and summary usage as a premium feature

Content Analysis

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Presents the pdf analysis as premium feature

PDF Analysis

1500 Top-up

3000 Top-up

Zendy Basic

2500 Top-up

Zendy Unlimited

Presents the access of premium content as premium feature

Premium Content

Accurate and reliable non-contact temperature sensors are imperative for industrial production and scientific research. Here, Er 3+ /Tm 3+ /Yb 3+ co-doped NaYF 4 phosphors were studied as an optical thermometry material. The typical hydrothermal method was used to synthesize hexagonal Er 3+ /Tm 3+ /Yb 3+ co-doped NaYF 4 phosphors and the morphology was approximately rod-like. The up-conversion emissions of the samples were located at 475, 520, 550, 650, 692 and 800 nm. Thermo-responsive emissions from the samples were monitored to evaluate the relative sensing sensitivity. The thermal coupled energy level- and non-thermal coupled energy level-based luminescence intensity ratio thermometry of the sample demonstrated that these two methods can be used to test temperature. Two green emissions (520 and 550 nm), radiated from 2 H 11/2 / 4 S 3/2 levels, were monitored, and the maximum relative sensing sensitivities reached to 0.013 K -1 at 297 K. The emissions located in the first biological window (650, 692 and 800 nm) were monitored and the maximum relative sensing sensitivities reached to 0.027 ( R  692/650 ) and 0.028 K -1 ( R  692/800 ) at 297 K, respectively. These results indicate that Er 3+ /Tm 3+ /Yb 3+ co-doped NaYF 4 phosphors have potential applications for temperature determination in the visible and the first biological window ranges.

nanomaterials

Up-Converting Luminescence and Temperature Sensing of Er3+/Tm3+/Yb3+ Co-Doped NaYF4 Phosphors Operating in Visible and the First Biological Window Range