We present an optical technique to detect cantilever deflection of an array using Fraunhofer diffraction patterns. Application areas include probe-based data storage. Intensity profiles of different cantilever arrays are captured on a CCD camera and compared with our model. These measurements are in excellent agreement with the Fraunhofer theory, less than 3% deviation is found. Each cantilever...

The efficient cooling of nanomechanical resonators is essential to exploration of quantum properties of the macroscopic or mesoscopic systems. We propose such a laser-cooling scheme for a nanomechanical cantilever, which works even for the low-frequency mechanical mode and under weak cooling lasers. The cantilever is coupled by a diamond nitrogen-vacancy center under a strong magnetic field gra...

A self-compensating fiber optic flow sensor system based on the principle of broadband white-light interferometers and cantilever beam bending is described. The fiber optic sensor system uses two fiber ferrule sensors that are bonded on either side of a cantilever beam to measure the flow rate by monitoring the air-gap changes caused by the bending of the cantilever beam. Cross sensitivity of t...

A method to determine the spring constant of a rectangular atomic force microscope cantilever is proposed that relies solely on the measurement of the resonant frequency and quality factor of the cantilever in fluid ~typically air!, and knowledge of its plan view dimensions. This method gives very good accuracy and improves upon the previous formulation by Sader et al. @Rev. Sci. Instrum. 66, 3...

Generation of nanomechanical cantilever motion from biomolecular interactions can have wide applications, ranging from high-throughput biomolecular detection to bioactuation. Although it has been suggested that such motion is caused by changes in surface stress of a cantilever beam, the origin of the surface-stress change has so far not been elucidated. By using DNA hybridization experiments, w...

We discuss the dynamics of an amplitude modulation atomic force microscope in different environments such as water and air. Experiments, analytical expressions, and numerical simulations show that the resonance curves depend on the excitation method used to drive the cantilever, either mechanical or magnetic. This dependence is magnified for small force constants and quality factors, i.e., belo...

Micromechanical cantilever arrays are used to measure time-resolved adsorption of tiny masses based on protein-ligand interactions. Here, streptavidin-biotin interactions are investigated in a physiological environment. A measurement method is introduced using higher flexural modes of a silicon cantilever in order to enhance the sensitivity of mass detection. Modeling the cantilever vibration i...

Asylum Research’s blueDrive Photothermal Excitation option for the Cypher STM and Cypher ESTM atomic force microscopes (AFMs) makes tapping mode techniques simpler, more stable, and more quantitative. Tapping mode is by far the dominant choice in the world of AFM, measuring not just topography, but also mechanical, electrical, and magnetic properties. Typically, piezoacoustic excitation is used...

107106-6464 IJET-IJENS © December 2010 IJENS I J E N S Abstract— Capacitive cantilever-mass micro-machined accelerometers have attracted much interest for properties such as a simple structure and potentially high sensitivity. This paper presents the simulation of a low-g capacitive cantilever-mass micro-machined accelerometer model to gain the desirable magnitude of displacement and capacitanc...

In this paper, the elastic behaviour in bending of three-layer plywood cantilever beams is analysed. Deflections straight and half-circle cantilevers, loaded with a force at free end determined experimentally calculated using analytical finite element method approach. The calculation deflection for strait obtained transformed cross section. by classical laminated plate theory Castigliano’s theo...