Figure 5 | Scientific Reports

Figure 5

From: High specificity THz metamaterial-based biosensor for label-free transcription factor detection in melanoma diagnostics

Figure 5

(a) Schematic overview of Toptica TeraScan 1550 with added optical path and data evaluation instance. The THz-beam is depicted in green, connecting fibers are displayed in light and dark red, signal lines are displayed in light blue and control lines in dark blue. Rx: receiver, DFB laser: distributed feedback laser, DLC: digital laser controller, Tx: transceiver/emitter. (b) Photograph of exemplary sensor preparation. (c) Schematic depiction of the 25 query fields and their functionalization. From top to bottom: First row, red circles: Group I-spots (water); second row, red circles with dotted outline: Group II-spots (PBS); third row, light green circles with red outline: Group III-spots (tssDNA); fourth and fifth row, dark green circles: Group IV-spots (dsDNA).

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