Zakiyyan Naadaa, Darr Charles M, Chen Biyan, Mathai Cherian, Gangopadhyay Keshab, McFarland Jacob, Gangopadhyay Shubhra, Maschmann Matthew R
Department of Electrical Engineering and Computer Science, University of Missouri, Columbia, MO 65211, USA.
J. Mike Walker Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA.
Sensors (Basel). 2021 Feb 24;21(5):1585. doi: 10.3390/s21051585.
Partially aggregated Rhodamine 6G (R6G) dye is used as a lights-on temperature sensor to analyze the spatiotemporal heating of aluminum nanoparticles (Al NPs) embedded within a tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride (THV) fluoropolymer matrix. The embedded Al NPs were photothermally heated using an IR laser, and the fluorescent intensity of the embedded dye was monitored in real time using an optical microscope. A plasmonic grating substrate enhanced the florescence intensity of the dye while increasing the optical resolution and heating rate of Al NPs. The fluorescence intensity was converted to temperature maps via controlled calibration. The experimental temperature profiles were used to determine the Al NP heat generation rate. Partially aggregated R6G dyes, combined with the optical benefits of a plasmonic grating, offered robust temperature sensing with sub-micron spatial resolution and temperature resolution on the order of 0.2 °C.
部分聚集的罗丹明6G（R6G）染料用作开启式温度传感器，以分析嵌入四氟乙烯、六氟丙烯和偏二氟乙烯（THV）含氟聚合物基质中的铝纳米颗粒（Al NPs）的时空加热情况。使用红外激光对嵌入的Al NPs进行光热加热，并使用光学显微镜实时监测嵌入染料的荧光强度。等离子体光栅基板增强了染料的荧光强度，同时提高了Al NPs的光学分辨率和加热速率。通过控制校准将荧光强度转换为温度图。实验温度曲线用于确定Al NP的发热速率。部分聚集的R6G染料与等离子体光栅的光学优势相结合，提供了具有亚微米空间分辨率和0.2°C左右温度分辨率的强大温度传感功能。
