High-Resolution Local Imaging of Temperature in Dielectrophoretic Platforms

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• 作者：Fabrice Gielen ; Fiona Pereira ; Andrew J. deMello ; Joshua B. Edel
• 刊名：Analytical Chemistry
• 出版年：2010
• 出版时间：September 1, 2010
• 年：2010
• 卷：82
• 期：17
• 页码：7509-7514
• 全文大小：226K
• 年卷期：v.82,no.17(September 1, 2010)
• ISSN：1520-6882

文摘

The use of dielectrophoretic forces is crucially tied to the knowledge of Joule heating within a fluid, since the use of planar microelectrodes creates a temperature gradient within which the particle of interest is manipulated. Mapping temperature with sufficient spatial resolution within a dielectrophoretic trap is recognized to be of high importance. Herein, we demonstrate local temperature measurements in the vicinity of a trapped micrometer-size particle using confocal fluorescence spectroscopy. Such measurements are shown to provide a novel calibration tool for screening temperature-mediated processes with high resolution.