A simple approach for the precise measurement of surface temperature distributions on the microscale under dry and liquid conditions based on thin Rhodamine B films
A simple approach for the precise measurement of surface temperature distributions on the microscale under dry and liquid conditions based on thin Rhodamine B films
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DOI：
10.1016/j.snb.2017.09.001
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发表时间：
2018-02-01
影响因子：
8.4
通讯作者：
Kirschbaum, Michael
中科院分区：
文献类型：
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作者：
Behm, Laura V. J.;Schlenther, Ilka;Kirschbaum, Michael
在微尺度上精确测量表面温度对于处理温度依赖过程的芯片实验室应用具有重要意义。为此，迫切需要将高温分辨率与可行性、灵活性和水环境适用性相结合的测温方法。在这里，我们提出并描述了一种简单的表面温度测量方法，该方法基于市售的含有温度敏感荧光团罗丹明b的溶胶凝胶薄膜，这些薄膜可以在简单的两步过程中应用于各种表面，并允许在干燥和液体条件下在微尺度上进行温度测绘。为了证明这种方法的潜力，我们测量了电阻式微加热器表面的温度分布。我们分析了微小的表面温度梯度，并进行了与时间相关的测量。这证明了在干燥和液体条件下使用所述方法可以实现的关于温度（< 1摄氏度），空间（一维中较低的μ m范围）和时间（亚秒范围）的高分辨率。我们的实验结果与基于有限元的模拟结果的良好相关性证实了该方法的可靠性。(C) 2017年Elsevier B.V.出版
The precise measurement of surface temperatures on the microscale is of major importance for lab-on-a-chip applications that deal with temperature-dependent processes. For that, thermometric methods that combine high temperature resolution with feasibility, flexibility and applicability in aqueous environments are strongly required. Here, we present and characterize an easy approach for surface temperature measurements based on thin films of commercially available sol-gel that contain the temperature sensitive fluorophore Rhodamine B. These films can be applied onto various surfaces in an easy two-step process and allow for temperature mapping on the microscale under both dry and liquid conditions. To demonstrate the potential of the approach we measured the temperature distribution at the surface of resistive microheaters. We analyzed minute surface temperature gradients and conducted time-dependent measurements. This demonstrated the high resolution regarding temperature (< 1 degrees C), space (lower mu m-range in one dimension), and time (sub-seconds-range) that can be achieved with the described approach under dry as well as under liquid conditions. Good correlation of our experimental results to those from finite element-based simulations confirmed the reliability of the approach. (C) 2017 Published by Elsevier B.V.