Sensor Egregium – An Atomic Force Microscope Sensor for Continuously Variable Resonance Amplification

2021 ◽  
pp. 1-23
Author(s):  
Rafiul Shihab ◽  
Tasmirul Jalil ◽  
Burak Gulsacan ◽  
Matteo Aureli ◽  
Ryan Tung
Keyword(s):  
Finite Element Analysis ◽  
Atomic Force Microscope ◽  
Natural Frequencies ◽  
Proof Of Concept ◽  
Element Analysis ◽  
Force Microscopy ◽  
Atomic Force ◽  
Wide Range ◽  
Curve Veering ◽  
Dynamic Phenomena

Abstract Numerous nanometrology techniques concerned with probing a wide range of frequency dependent properties would benefit from a cantilevered sensor with tunable natural frequencies. In this work, we propose a method to arbitrarily tune the stiffness and natural frequencies of a microplate sensor for atomic force microscope applications, thereby allowing resonance amplification at a broad range of frequencies. This method is predicated on the principle of curvature-based stiffening. A macroscale experiment is conducted to verify the feasibility of the method. Next, a microscale finite element analysis is conducted on a proof-of-concept device. We show that both the stiffness and various natural frequencies of the device can be highly controlled through applied transverse curvature. Dynamic phenomena encountered in the method, such as eigenvalue curve veering, are discussed and methods are presented to accommodate these phenomena. We believe that this study will facilitate the development of future curvature-based microscale sensors for atomic force microscopy applications.

A Novel Plate-Like Sensor Utilizing Curvature-Based Stiffening for Nanometrology Applications

2020 ◽  
Author(s):  
Rafiul Shihab ◽  
Tasmirul Jalil ◽  
Burak Gulsacan ◽  
Matteo Aureli ◽  
Ryan C. Tung
Keyword(s):  
Finite Element Analysis ◽  
Atomic Force Microscopy ◽  
Natural Frequencies ◽  
Piezoelectric Actuators ◽  
Static Stiffness ◽  
Element Analysis ◽  
Force Microscopy ◽  
Transverse Curvature ◽  
Atomic Force

Abstract In this study, we propose a novel plate-like sensor which utilizes curvature-based stiffening effects for enhanced nanometrology. In the proposed concept, the stiffness and natural frequencies of the sensor can be arbitrarily adjusted by applying a transverse curvature via piezoelectric actuators, thereby enabling resonance amplification over a broad range of frequencies. The concept is validated using a macroscale experiment. Then, a microscale finite element analysis is used to study the effect of applied curvature on the microplate static stiffness and natural frequencies. We show that imposed transverse curvature is an effective way to tune the in-situ static stiffness and natural frequencies of the plate sensor system. These findings will form the basis of future curvature-based stiffening microscale studies for novel scenarios in atomic force microscopy.

scholarly journals Finite element analysis of V-shaped cantilevers for atomic force microscopy under normal and lateral force loads

2006 ◽  
Vol 38 (6) ◽  
pp. 1090-1095 ◽  
Author(s):  
Matthias Müller ◽  
Thomas Schimmel ◽  
Pascal Häußler ◽  
Heiko Fettig ◽  
Ottmar Müller ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Atomic Force Microscopy ◽  
Finite Element ◽  
Lateral Force ◽  
Element Analysis ◽  
Force Microscopy ◽  
Atomic Force

Modelling of Nanoindentation of Compliant Layers on Stiffer Substrates using Finite Element Analysis

2007 ◽  
Vol 1025 ◽  
Author(s):  
Charles A Clifford ◽  
Martin P Seah
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Atomic Force Microscope ◽  
Indentation Depth ◽  
Element Analysis ◽  
Depth Data ◽  
Atomic Force ◽  
Reduced Modulus ◽  
Compliant Layer ◽  
Initial Results

AbstractNanoindentation using an Atomic Force Microscope (AFM) or a nanoindenter was modelled using Finite Element Analysis (FEA). Force versus indentation depth data were taken for a system consisting of a compliant layer on a stiffer substrate. It was found that the FEA results may be expressed analytically by a simple function that describes the reduced modulus value obtained with Oliver and Pharr's method for any moduli values, thickness of layer or radius of the indenter tip. Initial results obtained by varying the Poisson's ratio of the layer and substrate are also presented.

Mass Transfer Limitations at Crystallizing Interfaces in an Atomic Force Microscopy Fluid Cell:  A Finite Element Analysis

Langmuir ◽  
2006 ◽  
Vol 22 (15) ◽  
pp. 6578-6586 ◽  
Author(s):  
David Gasperino ◽  
Andrew Yeckel ◽  
Brian K. Olmsted ◽  
Michael D. Ward ◽  
Jeffrey J. Derby
Keyword(s):  
Mass Transfer ◽  
Finite Element Analysis ◽  
Atomic Force Microscopy ◽  
Finite Element ◽  
Element Analysis ◽  
Force Microscopy ◽  
Atomic Force ◽  
Fluid Cell

scholarly journals SIMULATION OF MORPHOLOGICAL AND FUNCTIONAL PROPERTIES OF ERYTHROCYTE MEMBRANE

2017 ◽  
Vol 19 (9.1) ◽  
pp. 177-190
Author(s):  
Yu.S. Nagornov ◽  
I.V. Zhilyaev
Keyword(s):  
Finite Element Analysis ◽  
Experimental Study ◽  
Atomic Force Microscopy ◽  
Finite Element ◽  
Erythrocyte Membrane ◽  
Optimization Methods ◽  
Element Analysis ◽  
Erythrocyte Morphology ◽  
Force Microscopy ◽  
Atomic Force

The paper presents a model for the calculation of morphofunctional erythrocyte properties. The model represents the erythrocyte as a homogeneous elastic body with elastic depending on the distance to the center of symmetry of the erythrocyte. The data for modeling were taken from the experimental study, which were used by atomic force microscopy (measuring the elasticity of the membrane of erythrocytes and morphology) and the Coulter method. In the developed model, the elasticity of the membrane to change depending on the distance to the center within 1-1,6 kPa. The calculation of the elastic properties is made by two methods - finite element analysis and optimization methods. In the model the dependence of erythrocyte morphology on the membrane pressure was obtained. Pressure difference across the erythrocyte membrane varied in the range of 0,5-2 kPa.

Microcantilever chaotic motion suppression in tapping mode atomic force microscope

2012 ◽  
Vol 227 (8) ◽  
pp. 1730-1741 ◽  
Author(s):  
José Manoel Balthazar ◽  
Angelo Marcelo Tusset ◽  
Silvio Luiz Thomaz de Souza ◽  
Atila Madureira Bueno
Keyword(s):  
Atomic Force Microscopy ◽  
Feedback Control ◽  
Atomic Force Microscope ◽  
Chaotic Motion ◽  
Delayed Feedback Control ◽  
Linear Feedback ◽  
Tapping Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Wide Range

The tapping mode is one of the mostly employed techniques in atomic force microscopy due to its accurate imaging quality for a wide variety of surfaces. However, chaotic microcantilever motion impairs the obtention of accurate images from the sample surfaces. In order to investigate the problem the tapping mode atomic force microscope is modeled and chaotic motion is identified for a wide range of the parameter's values. Additionally, attempting to prevent the chaotic motion, two control techniques are implemented: the optimal linear feedback control and the time-delayed feedback control. The simulation results show the feasibility of the techniques for chaos control in the atomic force microscopy.

Determination of Strain-Rate-Dependent Mechanical Behavior of Living and Fixed Osteocytes and Chondrocytes Using Atomic Force Microscopy and Inverse Finite Element Analysis

2014 ◽  
Vol 136 (10) ◽  
Author(s):  
Trung Dung Nguyen ◽  
YuanTong Gu
Keyword(s):  
Finite Element Analysis ◽  
Atomic Force Microscopy ◽  
Strain Rate ◽  
Mechanical Behavior ◽  
Strain Rates ◽  
Element Analysis ◽  
Force Microscopy ◽  
Rate Dependent ◽  
Atomic Force ◽  
Inverse Finite Element Analysis

The aim of this paper is to determine the strain-rate-dependent mechanical behavior of living and fixed osteocytes and chondrocytes, in vitro. First, atomic force microscopy (AFM) was used to obtain the force–indentation curves of these single cells at four different strain-rates. These results were then employed in inverse finite element analysis (FEA) using modified standard neo-Hookean solid (MSnHS) idealization of these cells to determine their mechanical properties. In addition, a FEA model with a newly developed spring element was employed to accurately simulate AFM evaluation in this study. We report that both cytoskeleton (CSK) and intracellular fluid govern the strain-rate-dependent mechanical property of living cells whereas intracellular fluid plays a predominant role on fixed cells' behavior. In addition, through the comparisons, it can be concluded that osteocytes are stiffer than chondrocytes at all strain-rates tested indicating that the cells could be the biomarker of their tissue origin. Finally, we report that MSnHS is able to capture the strain-rate-dependent mechanical behavior of osteocyte and chondrocyte for both living and fixed cells. Therefore, we concluded that the MSnHS is a good model for exploration of mechanical deformation responses of single osteocytes and chondrocytes. This study could open a new avenue for analysis of mechanical behavior of osteocytes and chondrocytes as well as other similar types of cells.

Bionic design of the tower for wind turbine

2021 ◽  
pp. 095440622110046
Author(s):  
Yuqiao Zheng ◽  
Fugang Dong ◽  
Huquan Guo ◽  
Bingxi Lu ◽  
Zhengwen He
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
Natural Frequencies ◽  
Bionic Design ◽  
Analytic Hierarchy ◽  
Element Analysis ◽  
Maximum Deformation ◽  
Overall Stability ◽  
Biological Selection

The study obtains a methodology for the bionic design of the tower for wind turbines. To verify the rationality of the biological selection, the Analytic Hierarchy Procedure (AHP) is applied to calculate the similarity between the bamboo and the tower. Creatively, a bionic bamboo tower (BBT) is presented, which is equipped with four reinforcement ribs and five flanges. Further, finite element analysis is employed to comparatively investigate the performance of the BBT and the original tower (OT) in the static and dynamic. Through the investigation, it is suggested that the maximum deformation and maximum stress can be reduced by 5.93 and 13.75% of the BBT. Moreover, this approach results in 3% and 1.1% increase respectively in the First two natural frequencies and overall stability.

Studies of Nanomechanical Properties of Pulsed Laser Deposited NbN films on Si Using Nanoindentation

2012 ◽  
Vol 1424 ◽  
Author(s):  
M. A. Mamun ◽  
A. H. Farha ◽  
Y. Ufuktepe ◽  
H. E. Elsayed-Ali ◽  
A. A. Elmustafa
Keyword(s):  
Thin Films ◽  
Pulsed Laser ◽  
Niobium Nitride ◽  
X Ray Diffraction ◽  
Si Substrate ◽  
Force Microscopy ◽  
Atomic Force ◽  
Wide Range ◽  
Pile Up ◽  
Average Modulus

ABSTRACTNanomechanical and structural properties of pulsed laser deposited niobium nitride thin films were investigated using X-ray diffraction, atomic force microscopy, and nanoindentation. NbN film reveals cubic δ-NbN structure with the corresponding diffraction peaks from the (111), (200), and (220) planes. The NbN thin films depict highly granular structure, with a wide range of grain sizes that range from 15-40 nm with an average surface roughness of 6 nm. The average modulus of the film is 420±60 GPa, whereas for the substrate the average modulus is 180 GPa, which is considered higher than the average modulus for Si reported in the literature due to pile-up. The hardness of the film increases from an average of 12 GPa for deep indents (Si substrate) measured using XP CSM and load control (LC) modes to an average of 25 GPa measured using the DCM II head in CSM and LC modules. The average hardness of the Si substrate is 12 GPa.

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