Measuring temperature heterogeneities during solar-photothermal heating using quantum dot nanothermometry,Analyst

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Measuring temperature heterogeneities during solar-photothermal heating using quantum dot nanothermometry
Analyst ( IF 3.6 ) Pub Date : 2021-2-3 , DOI: 10.1039/d0an02258f
Stephanie K. Loeb _{1,

2,

3,

4,

5} , Haoran Wei _{1,

2,

3,

4,

6} , Jae-Hong Kim _{1,

2,

3,

4}

Affiliation

Small metallic nanoparticles with appropriate surface plasmon resonance frequencies can be extremely efficient absorbers of solar radiation. This efficient absorption can lead to localized heating and highly heterogeneous temperatures. These unique optical properties have inspired research into the development of environmentally relevant solar-to-heat conversion technologies that are based on the light absorption of nanomaterials. The development of robust, reliable, and straight-forward techniques for measuring spatially resolved temperatures in photothermally heated systems can be an indispensable tool to aid future work in this area. Herein, we consider the application of a fluorescent technique that can measure spatially resolved temperatures in solar photothermal systems using CdSe quantum dots (<10 nm diameter). The local temperature of the quantum dot can be determined by monitoring the shift in its fluorescence wavelength resulting from the dilatation of the lattice with increasing temperature. To exploit this property, we fabricated Au nanorod-quantum dot architectures using linkers of varying lengths, and measured the light induced temperature change increasing more rapidly closer to the surface of an Au nanorod. We also compared the effect of Au nanorod coatings and found that silica coating leads to higher overall temperatures compared to organic stabilized Au nanorods.

中文翻译：

使用量子点纳米热法测量太阳光热加热过程中的温度异质性

具有适当的表面等离子体共振频率的小金属纳米粒子可以是太阳辐射的极有效吸收剂。这种有效的吸收会导致局部加热和温度高度不均匀。这些独特的光学特性激发了对开发与环境相关的基于纳米材料的光吸收的太阳热转换技术的研究的兴趣。用于测量光热加热系统中空间分辨温度的强大，可靠且简单的技术的开发可能是帮助该领域未来工作的必不可少的工具。在这里，我们考虑了荧光技术的应用，该技术可以使用CdSe量子点（直径小于10 nm）测量太阳光热系统中的空间分辨温度。量子点的局部温度可以通过监测随着温度的升高晶格膨胀而导致的荧光波长的变化来确定。为了利用这一特性，我们使用不同长度的连接体制造了Au纳米棒-量子点结构，并测量了光致温度的变化，使其更迅速地靠近Au纳米棒的表面。我们还比较了金纳米棒涂层的效果，发现与有机稳定的金纳米棒相比，二氧化硅涂层导致更高的总体温度。并测量了光致温度变化，使其更靠近Au纳米棒的表面而迅速增加。我们还比较了金纳米棒涂层的效果，发现与有机稳定的金纳米棒相比，二氧化硅涂层导致更高的总体温度。并测量了光致温度变化，使其更靠近Au纳米棒的表面而迅速增加。我们还比较了金纳米棒涂层的效果，发现与有机稳定的金纳米棒相比，二氧化硅涂层导致更高的总体温度。

更新日期：2021-02-03

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