Ag2S quantum dots-decorated NaYF4 nanocomposites as NIR-II ratiometric fluorescent nanothermometers for temperature sensing

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-04-24 DOI:10.1016/j.jlumin.2025.121276

Xing Yang , Jie Hu , Kaixin Ji , Qinglai Wang , Shiyu Lu , Jinsheng Liao , Haomiao Zhu

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引用次数: 0

Abstract

Fluorescent ratio-based thermometers, especially the combination of thermal sensitive quantum dots (QDs) with thermal stable lanthanide doped nanoparticles (NPs), have demonstrated great potential for temperature sensing due to their high relative thermal sensitivity. In this work, we synthesized NaYF₄: 3 %Nd@NaYF₄@SiO₂@Ag₂S nanocomposites (NCs), where Ag₂S QDs were integrated onto the surface of NaYF₄: 3 %Nd@NaYF₄ NPs. Under 808 nm excitation, the luminescence intensity ratio of the NCs in the 1200 nm and 1060 nm exhibits a strong linear relationship with temperature. The NCs show a relative sensitivity of 5.05 % °C⁻¹ at 47 °C and maintain photostability through six temperature cycles, under various pH conditions, and during prolonged irradiation. In vitro fluorescence imaging further confirms their potential for temperature measurement in aqueous environments. This approach offers a novel design concept for the creation of a highly sensitive nanothermometer.

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Ag2S量子点修饰的NaYF4纳米复合材料作为NIR-II比例荧光纳米温度计用于温度传感

基于荧光比例的温度计，特别是热敏量子点（QDs）与热稳定镧系掺杂纳米粒子（NPs）的组合，由于其较高的相对热敏性，已经显示出巨大的温度传感潜力。在这项工作中，我们合成了NaYF4: 3% Nd@NaYF4@SiO2@Ag2S纳米复合材料（NCs），其中Ag2S量子点集成在NaYF4: 3% Nd@NaYF4 NPs表面。在808 nm激发下，纳米碳在1200 nm和1060 nm的发光强度比与温度呈较强的线性关系。NCs在47°C时的相对灵敏度为5.05%°C - 1，并在不同pH条件下和长时间照射下通过6个温度循环保持光稳定性。体外荧光成像进一步证实了它们在水环境中温度测量的潜力。这种方法为制造高灵敏度纳米温度计提供了一种新颖的设计理念。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.