Response of a laterally vibrating nanotip to surface forces

Yurtsever, Ayhan; Gigler, Alexander M.; Macias, Eduardo; Stark, Robert W.

doi:10.1063/1.2826285

Cited by 13 publications

(7 citation statements)

References 19 publications

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“…The angular detection noise density n θ , in rad Hz −1/2 , describes the lower detection limit for an optical beam deflection system across any arbitrary bandwidth [19]. The angular bending of the cantilever can in principle be calibrated into a tip displacement and a force; however, we avoid complications that arise around and above the cantilever resonance frequency, discussed elsewhere [58][59][60][61], by simply dealing with the unequivocal angular detection noise density n θ to describe detection noise in this paper.…”

Section: Detection Noisementioning

confidence: 99%

The noise of coated cantilevers

Labuda¹,

Bates²,

Grütter³

2011

Nanotechnology

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In atomic force microscopy, cantilevers with a reflective coating are often used to reduce optical shot noise for deflection detection. However, static AFM experiments can be limited by classical noise and therefore may not benefit from a reduction in shot noise. Furthermore, the cantilever coating has the detrimental side-effect of coupling light power fluctuations into true cantilever bending caused by time-varying thermal stresses. Here, we distinguish three classes of noise: detection, force, and displacement noise. We discuss these noises with respect to cantilever coating in the context of both static and dynamic AFM experiments. Finally, we present a patterned cantilever coating which reduces the impact of these noises.

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Section: Detection Noisementioning

confidence: 99%

The noise of coated cantilevers

Labuda¹,

Bates²,

Grütter³

2011

Nanotechnology

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“…[36] Therefore, the roughness calculated with help of the amplitude measurements is more representative than the one done on basis of the measurements of the z-axis position. [37] Besides the surface roughness values, the skewness and kurtosis of the samples were evaluated for better demonstration of the granular uniformity resulting from the laser treatment. Skewness is the measure of deviation of the surface from the symmetry.…”

Section: Resultsmentioning

confidence: 99%

“…[ 36 ] Therefore, the roughness calculated with help of the amplitude measurements is more representative than the one done on basis of the measurements of the z ‐axis position. [ 37 ]…”

Section: Resultsmentioning

confidence: 99%

Laser Treatment of Dental Implants toward an Optimized Osseointegration: Evaluation via Tapping‐Mode Atomic Force Microscopy and Scanning Electron Microscopy

Luczak,

Reiner-Rozman,

Muck

et al. 2023

Physica Status Solidi (a)

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Surface modifications of dental implants play a crucial role for material stability, durability and patient contentment; hence optimization of the commonly used techniques can have significant impact. Surface properties affect the osseointegration of implants; however, the surface for the optimal osseointegration is still being researched. Herein the surface roughness and topography of dental implant screws after polishing, sandblasting and laser‐treatment via tapping‐mode atomic force microscopy (TM‐AFM) are investigated. The measurements were performed at the implants’ shank, crest and root sites and evaluated for surface roughness, kurtosis and skew values. Laser‐treated and sandblasted samples have a significantly higher roughness compared to the machined sample. The roughness at the root of the samples was higher in case of the laser‐treated and machined samples, while lower for the sandblasted implant. It was found that laser‐treatment leads to a roughness lower than that of sandblasted dental screws but significantly higher than that of mechanically polished implants. Differences in the roughness at different topological sites show the need for more precise treatment of implants in order to optimize the roughness.This article is protected by copyright. All rights reserved.

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“…Other considerations, such as the coupling of normal and lateral forces due to the cantilever tilt, 40 should also be considered when interpreting tip-sample interactions.…”

Section: Torsional To Lateral Conversionmentioning

confidence: 99%

Static and dynamic calibration of torsional spring constants of cantilevers

Labuda

Cao

Walsh

et al. 2018

Review of Scientific Instruments

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A method for calibrating the dynamic torsional spring constant of cantilevers by directly measuring the thermally driven motion of the cantilever with an interferometer is presented. Random errors in calibration were made negligible (<1%) by averaging over multiple measurements. The errors in accuracy of ±5% or ±10% for both of the cantilevers calibrated in this study were limited only by the accuracy of the laser Doppler vibrometer (LDV) used to measure thermal fluctuations. This is a significant improvement over commonly used methods that result in large and untraceable errors resulting from assumptions made about the cantilever geometry, material properties, and/or hydrodynamic physics of the surroundings. Subsequently, the static torsional spring constant is determined from its dynamic counterpart after careful LDV measurements of the torsional mode shape, backed by finite element analysis simulations. A meticulously calibrated cantilever is used in a friction force microscopy experiment that measures the friction difference and interfacial shear strength (ISS) between graphene and a silicon dioxide AFM probe. Accurate calibration can resolve discrepancies between different experimental methods, which have contributed to a large scatter in the reported friction and ISS values in the literature to date.

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Response of a laterally vibrating nanotip to surface forces

Cited by 13 publications

References 19 publications

The noise of coated cantilevers

The noise of coated cantilevers

Laser Treatment of Dental Implants toward an Optimized Osseointegration: Evaluation via Tapping‐Mode Atomic Force Microscopy and Scanning Electron Microscopy

Static and dynamic calibration of torsional spring constants of cantilevers

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