A novel DFM cantilever with tuning function of resonant frequency for biomaterial imaging

We have developed a novel dynamic force microscope (DFM) cantilever with a function of tuning resonant frequency for measuring the topography of biomaterials with a single cantilever. We have integrated the electrostatic driving, clamping, and the lever motion amplification systems into the cantilever to change the cantilever length for varying the spring constant and resonant frequency. The resonant frequency is tunable in the range from 12 to 998 kHz, corresponding to the spring constant of 0.6 to 458 N/m. The system enables the imaging of biomolecule under a suitable condition by tuning the resonant frequency.