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. 2021 Aug 13;7:61. doi: 10.1038/s41378-021-00288-5

Fig. 7. Mass detection of acoustically localized particles of various diameters on a TPoS resonant sensor and measurement of mass sensitivity.

Fig. 7

a Comparison of the measured electrical transmission (S21) of a TPoS resonator (Chip B, same design as Chip A) in air with no particles added and after acoustically localized PS particles of a range of sizes are added. b Comparison between Chip A and Chip B of the measured frequency shift normalized over the nominal frequency as a function of the mass of the localized PS particles accreted on each TPoS resonator.