Nonlinearity in nanomechanical cantilevers

Nonlinearity in nanomechanical cantilevers

L. G. Villanueva,1,2 R. B. Karabalin,1 M. H. Matheny,1 D. Chi,1 J. E. Sader,1,3 and M. L. Roukes1 1Kavli Nanoscience Institute and Departments of Physics, Applied Physics, and Bioengineering, California Institute of Technology, Pasadena, California 91125, USA 2Department of Microand Nanotechnology, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark 3Department of Mathematics and S...

Nanomechanical humidity detection through porous alumina cantilevers

We present here the behavior of the resonance frequency of porous anodic alumina cantilever arrays during water vapor adsorption and emphasize their possible use in the micromechanical sensing of humidity levels at least in the range of 10-22%. The sensitivity of porous anodic aluminium oxide cantilevers (Δf/Δm) and the humidity sensitivity equal about 56 Hz/pg and about 100 Hz/%, respectively....

Dynamic interactions between oscillating cantilevers: Nanomechanical modulation using surface forces

Nanomechanical Sensor Platform Based On Piezo-Resistive Cantilevers

This paper presents Cantion’s cantilever-based bio/chemical sensor. The cantilevers have integrated readout and can be used both in liquids and gases. The sensing principle is based on a cantilever bending due to a change in surface stress. Such surface-stress change is obtained during molecular interaction which has made it possible to measure DNA hybridization, antigen-antibody interactions e...

Vibrational shape tracking of atomic force microscopy cantilevers for improved sensitivity and accuracy of nanomechanical measurements.

Contact resonance atomic force microscopy (CR-AFM) methods currently utilize the eigenvalues, or resonant frequencies, of an AFM cantilever in contact with a surface to quantify local mechanical properties. However, the cantilever eigenmodes, or vibrational shapes, also depend strongly on tip-sample contact stiffness. In this paper, we evaluate the potential of eigenmode measurements for improv...