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

Figure 15

Solution-based colorimetric sensing using nano-LCA sensor. The inset image shows drop of DNA solution with concentration 100 pM, 100 nM, and 100 μM on the sensor surface. The transmission color of the sensor changes from yellow to red when DNA concentration changes from 100 pM to 100 μM, respectively. The color spectra obtained from the image are also shown.