Figure 4.

(a) Resonance frequency response of a nanomechanical filter-fiber (1240 nm wide, 50 μm long, 100 nm thick silicon nitride coated with a layer of 50 nm Al) to 100 ± 8 nm silver nanoparticles with a mass of 5.5 ± 1.3 fg at an aerosol velocity of 133 m/s.The impaction of single nanoparticles is causing specific jumps in the resonance frequency of the nanomechanical resonant filter-fiber. The magnitude of the individual frequency jumps is a function of particle mass and landing position along the length of the fiber. The frequency is drift corrected. (b) Histogram of frequency shifts of all measurements recorded with the same filter-fiber. The error bars of the theoretical value of the maximal frequency shift is coming from geometrical uncertainties of the nanoparticles and filter-fiber.