Eye-Resolvable Surface-Plasmon-Enhanced Fluorescence Temperature Sensor.
Eye-Resolvable Surface-Plasmon-Enhanced Fluorescence Temperature Sensor.
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DOI：
10.3390/nano12224019
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发表时间：
2022-11-16
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影响因子：
--
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温度传感器作为测量温度的常用器件，广泛应用于日常家居、医疗、航空航天等重要领域。传统的温度传感器，如热电偶、热电阻、红外传感器等，在技术上已经成熟，但在应用环境、测温范围、测温精度等方面都存在局限性。提出了一种基于Ag@SiO2@CdS/ZnS复合纳米粒子双发射薄膜的人眼分辨表面等离子体增强荧光温度传感器，该传感器具有多参数可检测信号和高响应灵敏度。温度传感器的x-色度坐标在77-297 K的范围内从0.299变化到0.358，而y-色度坐标从0.288变化到0.440，显示眼睛可分辨的表面等离子体增强荧光。发现位于446和592 nm附近的两个孤立的光致发光（PL）峰积分区域的比率响应与温度显著相关，热灵敏度为1.4%K −1，可以用作测量精确温度的附加参数。此外，表面态发射峰强度与温度呈线性相关，相关系数R平方为99.8%。多个独立的温度估计可以帮助进行自校准并提高测量精度。我们的研究结果表明，所设计的传感器可以检测低温，同时保持稳定性和再现性。
Temperature sensors are widely used in important fields such as daily home, medical care, and aerospace as a commonly used device for measuring temperature. Traditional temperature sensors such as thermocouples, thermal resistances, and infrared sensors are technically mature; however, they have limitations in the application environment, temperature measurement range, and temperature measurement accuracy. An eye-resolvable surface plasmon-enhanced fluorescence temperature sensor based on dual-emission Ag@SiO2@CdS/ZnS composite nanoparticle film with multiple-parameter detectable signals and high response sensitivity was proposed in this work. The temperature sensor’s x-chromaticity coordinate varied from 0.299 to 0.358 in the range of 77–297 K, while the y-chromaticity coordinate varied from 0.288 to 0.440, displaying eye-resolvable surface plasmon-enhanced fluorescence. The ratiometric response of two isolated photoluminescence (PL) peak-integrated areas located around 446 and 592 nm was found to be significantly temperature dependent, with a thermal sensitivity of 1.4% K−1, which can be used as an additional parameter to measure the precise temperature. Furthermore, the surface state emission peak intensity was linearly related to temperature, with a correlation index Adj. R-Square of 99.8%. Multiple independent temperature estimates can help with self-calibration and improve the measurement accuracy. Our findings show that the designed sensors can detect low temperatures while maintaining stability and reproducibility.
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