Ultra-Sensitive Colorimetric Plasmonic Sensing and Microfluidics for Biofluid Diagnostics Using Nanohole Array

Figure 9

Colorimetric plasmonic sensing with nanocup array device. Bright field image ((a) and (c)) without and ((b) and (d)) with the sensor. The green color is with air and the orange color (inside the dotted area) is due to NaCl solution on top of the sensor. (e) Mixture of ethanol, oil, and NaCl shows distinctive colors on the sensor.

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