Engineering Bright and Mechanosensitive Alkaline-Earth Rare-Earth Upconverting Nanoparticles

被引：19

作者：

McLellan, Claire A. ^{[1
]}

Siefe, Chris ^{[1
]}

Casar, Jason R. ^{[1
]}

Peng, Chunte Sam ^{[2
,3
]}

Fischer, Stefan ^{[1
]}

Lay, Alice ^{[4
]}

Parakh, Abhinav ^{[1
]}

Ke, Feng ^{[5
]}

Gu, X. Wendy ^{[6
]}

Mao, Wendy ^{[5
]}

Chu, Steven ^{[2
,3
]}

Goodman, Miriam B. ^{[3
]}

Dionne, Jennifer A. ^{[1
,7
]}

机构：

[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Mol & Cellular Physiol, Stanford, CA 94305 USA

[4] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[5] Stanford Univ, Dept Geol Sci, Stanford, CA 94305 USA

[6] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

[7] Stanford Univ, Dept Radiol, Stanford, CA 94305 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2022年 / 13卷 / 06期

基金：

美国国家科学基金会;

关键词：

UP-CONVERSION; HIGH-PRESSURE; LANTHANIDE; PERSPECTIVES; LUMINESCENCE; FORCES; RUBY; LINE;

D O I：

10.1021/acs.jpclett.1c03841

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Upconverting nanoparticles (UCNPs) are an emerging platform for mechanical force sensing at the nanometer scale. An outstanding challenge in realizing nanometer-scale mechano-sensitive UCNPs is maintaining a high mechanical force responsivity in conjunction with bright optical emission. This Letter reports mechano-sensing UCNPs based on the lanthanide dopants Yb3+ and Er-3+,Er- which exhibit a strong ratiometric change in emission spectra and bright emission under applied pressure. We synthesize and analyze the pressure response of five different types of nanoparticles, including cubic NaYF4 host nanoparticles and alkaline-earth host materials CaLuF, SrLuF, SrYbF, and BaLuF, all with lengths of 15 nm or less. By combining optical spectroscopy in a diamond anvil cell with single-particle brightness, we determine the noise equivalent sensitivity (GPa/root Hz) of these particles. The SrYb0.72Er0.28F@SrLuF particles exhibit an optimum noise equivalent sensitivity of 0.26 +/- 0.04 GPa/root Hz. These particles present the possibility of robust nanometer-scale mechano-sensing.

引用

页码：1547 / 1553

页数：7

共 52 条

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