Fig. 2: Experimental ultrasonic setup with temperature variation. | Microsystems & Nanoengineering

Fig. 2: Experimental ultrasonic setup with temperature variation.

From: An in vitro demonstration of a passive, acoustic metamaterial as a temperature sensor with mK resolution for implantable applications

Fig. 2

a Three-dimensional view of the ultrasonic temperature setup consisting of three temperature probes connected to an external data logger, a 5-liter water tank, and an ultrasonic probe. The sample is immersed in water, previously heated at 45 °C (318 K) using a kettle. b Cross-sectional view (x–z) of the ultrasonic setup along the dashed line in a. The sample is supported at the edges. c Recorded transient behavior of the temperature in water (average value, purple solid line). The time trace (A-scan) for each pixel is recorded in the ROI (pixel (3,45) displayed in the inset of Fig. 2c). The C-scan consists of the spatial representation of the A-scans in the ROI, displayed as the root-mean-square voltage in the area where it is computed. The process is repeated for every temperature in the experimental range

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