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. 2017 Dec 21;12(12):e0189979. doi: 10.1371/journal.pone.0189979

Fig 2. Power spectrum density of cantilever’s deflections.

Fig 2

A) PSDs in air and water with their respective Sader’s model fit in fluid. B) PSDs of several mixtures of urea, the color bar represents the urea concentration. The inset in B shows the PSDs for different BSA concentrations, at a constant urea concentration of 7M. The color bar in the inset figure represents the BSA concentration from 0 to 0.6 mM.