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Showing 1 to 20 of 95 for “"cantilevers"”.
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Chemical functionalization of AFM cantilevers
… force spectroscopy and modification of AFM cantilevers. By immobilizing of certain molecules at the end of AFM cantilever, specific molecules or functionalities can be detected by the combination of intrinsic feature of AFM and chemical modification technique of AFM cantilever. The surface …
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Structural systems and conceptual design of cantilevers
Cantilevers are a popular way to express form and create unique feature spaces. From a design perspective, cantilevers are amazing feats for the built environment, and structurally, present many opportunities. However, conceptual cantilever design can be a difficult task for Architects and …
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The fluid-coupled motion of micro and nanoscale cantilevers
… we consider the coupling of two closely spaced cantilevers immersed in a viscous fluid subject to an external driving. While one cantilever is driven to oscillate, the adjacent cantilever is passive. This system is modeled as two simple harmonic oscillators in an array whose motion is coupled …
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Large deformation of rigid-viscoplastic cantilevers subjected to impulsive loading
The problem of a ductile metal cantilever structure (not necessarily initially straight) subjected to dynamic loads leading to deformations of the order of the dimensions of the structure is considered. The material is treated as rigid-viscoplastic; in this idealisation elastic effects are ignored, …
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Effect of Surface Stress on Micromechanical Cantilevers for Sensing Applications
Three models for surface stress loading effect on a micromechanical cantilever are proposed as concentrated moment acting at the free end (Model I), concentrated moment plus axial force acting at the free end (Model II), and uniformly distributed surface force acting along the microcantilever …
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Fabrication and material characterization of silver cantilevers via direct surface micromachining
… as sacrificial inks in addition to PMMA. Silver cantilevers with dimensions of 200x50[mu]m and 200x100[mu]m were fabricated as a demonstration of the process. The silver cantilevers were mechanically characterized by using force-deflection measurements made by a P-10 contact profilometer or a …
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The Correlated Dynamics of Micron-Scale Cantilevers in a Viscous Fluid
A number of microcantilever systems of fundamental importance are explored using theoretical and numerical methods to quantify and provide physical insights into the dynamics of experimentally accessible systems that include a variety of configurations and viscous fluids. It is first shown that the …
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High-Performance Accelerometer Based On Asymmetric Gapped Cantilevers For Physiological Acoustic Sensing
<p>Continuous or mobile monitoring of physiological sounds is expected to play important role in the emerging mobile healthcare field. Because of the miniature size, low cost, and easy installation, accelerometer is an excellent choice for continuous physiological acoustic signal monitoring. …
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Optimization studies of thermal bimorph cantilevers, electrostatic torsion actuators and variable capacitors
… for three kinds of MEMS devices: thermal bimorph cantilevers, electrostatic torsion actuators, and variable capacitors. Calculation, simulation, and experimental data are used to confirm the device behavior and demonstrate the application of the design approaches. For thermal bimorph cantilevers, …
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The Stochastic Dynamics of an Array of Micron Scale Cantilevers in Viscous Fluid
… of an array of closely spaced micron scale cantilevers in a viscous fluid is considered. The stochastic cantilever dynamics are due to the constant buffeting of fluid particles by Brownian motion and the dynamics of adjacent cantilevers are correlated due to long range effects of fluid …
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Design, fabrication and characterisation of free-standing thick-film piezoelectric cantilevers for energy harvesting
… devices. A series of free-standing composite cantilevers in the form of unimorphs were fabricated and characterised for their mechanical and electric properties. The unimorph structure consists of a pair of silver/palladium (Ag/Pd) electrodes sandwiching a laminar layer of lead zirconate …
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Thermally driven visco-elastic measurement technique via spectral variations in scanning probe microscopy cantilevers
… quantitatively compared to thermally driven SPM cantilevers to extract fluid properties. The new theory required for modeling the probe dynamics is outlined and the present limitations, for both the analytical and experimental techniques, are discussed.
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Low-power Power Management Circuit Design for Small Scale Energy Harvesting Using Piezoelectric Cantilevers
… from mechanical vibrations using piezoelectric cantilevers provides possible means to recharge the batteries or eliminate them. Raw power harvested from ambient sources should be conditioned and regulated to a desired voltage level before its application to electronic devices. The efficiency and …
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Vibration control and design of composite cantilevers taking into account structural uncertainties and damage
… a study of the vibrations of laminated composite cantilevers exhibiting structural uncertainties and damage is accomplished. The study is performed within both the Classical Lamination (CLT) and the First-order Transverse Shear Deformation Theories (FSDT). Upon comparing the natural frequencies …
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The driven and stochastic dynamics of micro and nanoscale cantilevers in viscous fluid and near a solid boundary
… is idealized. The dynamics of microscopic cantilevers in fluid are complicated and include significant contributions from many sources in an actual experiment. Some examples are: complex cantilever geometries, near-wall effects, thermal and external actuation techniques, and a variety of …
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An investigation into the usefulness of a method of analysis for straight, uniform-section, box-girder bridge decks with side cantilevers
… concrete box-girder bridge-decks with side cantilevers. This method only requires a calculator for execution and if a computer is used, results for maximum stresses may be obtained almost immediately. The authors state that since their method does not discretize the structure as in the case …
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Fundamentals of heat transfer and thermal-mechanical control for improved atomic force microscopy
… presents novel atomic force microscope (AFM) cantilevers and cantilever technology that improve the measurement rate and precision of AFM. AFM cantilevers with integrated heater-thermometers can generate and sense heat flows to measure and manipulate matter at the nanometer scale. These heated …
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Development of microcantilever mid-infrared detectors and sources and their application in infrared spectroscopy
… dynamic thermomechanical response of bimaterial cantilevers to periodic heating by an IR laser. A model relates incident IR radiation, heat transfer, temperature distribution in the cantilever, and thermal expansion mismatch to find the cantilever displacement. Silicon nitride-aluminum bimaterial …
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