Surface plasmon based thermo-optic and temperature sensor for microfluidic thermometry.
We report on a noninteracting technique for the thermal characterization of fluids based on surface plasmon resonance interrogation. Using liquid volumes less than 20 μl, we have determined the materials' thermo-optic coefficients with an accuracy of better than 1×10(-5) °C(-1) and demonstrated temperature sensing with an accuracy of 0.03 °C. The apparatus employs a low-power probe laser, requiring only a single wavelength, polarization, and interrogation angle for accurate characterization. The device is particularly suited for precise diagnostics of liquids and gases within microfluidic systems and may also be readily integrated into a variety of lab-on-chip platforms, providing rapid and accurate temperature diagnostics.
Department of Physics, University of Oregon, 1274 Eugene, Oregon 97403, USA.
L J
LJ
Davis
M
M
Deutsch
D002138:Calibration; D006358:Hot Temperature; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation*; D055620:Optical Phenomena; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D013499:Surface Properties; D013696:Temperature; D013821:Thermometers