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6 article(s) from Cohen, Sidney R

The role of convolutional neural networks in scanning probe microscopy: a review

Ido Azuri,
Irit Rosenhek-Goldian,
Neta Regev-Rudzki,
Georg Fantner and
Sidney R. Cohen

Beilstein J. Nanotechnol. 2021, 12, 878–901, doi:10.3762/bjnano.12.66

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Figure 1: Linear decision boundary (green straight line) that separates between samples belonging to two diff...

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Figure 2: Performance as function of sample data set size for traditional machine learning algorithms and dee...

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Figure 3: Upper left: example of a deep neural network (DNN). Upper right: example of a shallow neural networ...

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Figure 4: (a) Description of the convolutional layer of a CNN and (b) the convolution operation. In (b) the o...

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Figure 5: Loss function as a function of the number of epochs for the training set (blue line) and the testin...

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Figure 6: Predictions of the probability for a healthy cytoskeleton made by the model on testing set and trea...

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Figure 7: Example of images of healthy (top) and diseased (bottom) Pf-EV exposed cells from the test set and ...

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Figure 8: Average intensity for all images in the testing set and the images of treated cytoskeleton for (a) ...

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Figure 9: Class activation maps shown below the AFM images for selected images of healthy and Pf-EV-exposed c...

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Figure 10: Class activation maps shown below the AFM images for selected images of healthy and Pf-EV-exposed c...

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Review

Published 13 Aug 2021

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Grazing-incidence optical magnetic recording with super-resolution

Gunther Scheunert,
Sidney. R. Cohen,
René Kullock,
Ryan McCarron,
Katya Rechev,
Ifat Kaplan-Ashiri,
Ora Bitton,
Paul Dawson,
Bert Hecht and
Dan Oron

Beilstein J. Nanotechnol. 2017, 8, 28–37, doi:10.3762/bjnano.8.4

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Figure 1: MFM imaging of a HDD featuring PMR with magnetic domains being aligned parallel or antiparallel to ...

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Figure 2: Magnetic recording medium: (a) TEM cross-section image with indication of the stack setup used for ...

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Figure 3: Polarization dependence of absorptivity (λ = 785 nm): p-polarized light is 3.5–4 times better absor...

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Figure 4: Influence of the DC bias field during laser illumination (λ = 532 nm, CW, P = 8 mW) on an as-is HDD...

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Figure 5: (a) Free-hand writing of magnetic features at CW illumination (p-polarized, 785 nm, 12 mW), yieldin...

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Figure 6: MFM phase scans and intensity profiles of “dots” laser-written at 785 nm. The laser power was kept ...

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Figure 7: Power absorption per volume within the magnetic stack. (a) Cross-sectional absorption per layer of ...

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Figure 8: Comsol thermal modelling of a Gaussian laser pulse (P = 40 mW; λ = 785 nm; τ = 50 ns, γ = 70°) bein...

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Album

Full Research Paper

Published 04 Jan 2017

Full text

A nanometric cushion for enhancing scratch and wear resistance of hard films

Katya Gotlib-Vainshtein,
Olga Girshevitz,
Chaim N. Sukenik,
David Barlam and
Sidney R. Cohen

Beilstein J. Nanotechnol. 2014, 5, 1005–1015, doi:10.3762/bjnano.5.114

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Figure 1: Friction from plowing of wear particles [16] a) materials of same hardness, b) top material harder than...

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Figure 2: SEM images of titania coating on a) Si, b) kapton and c) PDMS. rms roughness measured by AFM and th...

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Figure 3: AFM images of titania on Si (I, II), kapton (III, IV) and PDMS (V, VI) before and after scratching ...

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Figure 4: Wear volumes (in µm³) resulting from different loads for the titania coatings on Si and kapton.

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Figure 5: SEM images of titania coating on a) PC, b) PC and PDMS.

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Figure 6: UV–vis spectra for PC with and without titania/PDMS coating. Blue is uncoated PC and green is coate...

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Figure 7: AFM images showing results of scratch tests on coated and uncoated PC at the loads indicated. (a) n...

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Figure 8: Dependence of scratch resistance on sliding speed. a) AFM image of PC + TiO₂ after scratching. b) C...

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Figure 9: Applied load vs friction force curves and µ evaluated by lateral force microscopy.

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Figure 10: FEA model for 7 nm titania layer for 10 nN force showing z-component of global stress distribution ...

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Figure 11: Model used for finite element calculations, for 7 nm titania film thickness. (a) Substrate is seen ...

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Album

Full Research Paper

Published 10 Jul 2014

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Dynamic nanoindentation by instrumented nanoindentation and force microscopy: a comparative review

Sidney R. Cohen and
Estelle Kalfon-Cohen

Beilstein J. Nanotechnol. 2013, 4, 815–833, doi:10.3762/bjnano.4.93

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Figure 1: Adhesion-induced hysteretic negative unloading force observed on indenting PDMS (4% cross-linked) b...

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Figure 2: (a) Schematic of instrumented nanoindenter, including P - calibrated force; L - support springs; D ...

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Figure 3: Load-vs-displacement curve taken by nanoindentation with a Berkovich indenter tip on a polyurethane...

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Figure 4: Fundamental models for a viscoelastic mechanical system. (a) Voigt model (b) Maxwell model (c) Gene...

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Figure 5: Modulus measurements on polypropylene (A) Load-vs-deformation curve (B) Reduced storage modulus det...

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Figure 6: Calibration of the system damping for INI. The damping was computed for each frequency at different...

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Figure 7: Dynamic INI of iPP as a function of the frequency. The error bars indicate the standard deviation c...

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Figure 8: AFM tip modulation: (a) Phase shift and (b) amplitude in air (dashed line) and on sample (solid lin...

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Figure 9: Dynamic AFM measurements of iPP as a function of the frequency. The measurements were made at a dep...

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Figure 10: AFM probe creep test showing the creep compliance calculated using Equation 11 for PMMA. (a) A 10 second creep...

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Review

Published 29 Nov 2013

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Direct monitoring of opto-mechanical switching of self-assembled monolayer films containing the azobenzene group

Einat Tirosh,
Enrico Benassi,
Silvio Pipolo,
Marcel Mayor,
Michal Valášek,
Veronica Frydman,
Stefano Corni and
Sidney R. Cohen

Beilstein J. Nanotechnol. 2011, 2, 834–844, doi:10.3762/bjnano.2.93

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Figure 1: (a) Topography (color bar: 0–70 nm), (b) phase (color bar: 0–15 degrees), (c) error signal (scale i...

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Figure 2: (a) Topography (color bar: 0–70 nm), (b) phase (color bar: 0–15 degrees), (c) error signal (scale i...

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Figure 3: (a) Topography (color bar: 0–15 nm), (b) phase (color bar: 0–20 degrees), (c) error signal (scale i...

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Figure 4: Histogram of the normalized modulus for different illumination conditions: As prepared, at 365 nm f...

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Figure 5: Displacement vectors for the normal mode that dominates the averaged force constant of (a) trans- a...

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Figure 6: (a) Arrangement of the fixed sulfur atoms in the MD model of the SAM. The unit cell that has been p...

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Figure 7: Compound 1 and compound 2 (2-DA-thiol), showing the deprotection reaction yielding the molecule use...

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Figure 8: AFM images of (a) clean evaporated Au surface (500 × 500 nm² color bar 12 nm) and (b) surface coate...

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Figure 9: UV–vis spectra for thio-2-DA in chloroform solution after exposure to 365 nm light (cis form) and 4...

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Figure 10: Sketch of the model used to derive SAM stiffness from QM results on the single molecule. (a) A is t...

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Figure 11: Computational compression procedure: Force acting on the indenter as a function of the distance bet...

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Album

Full Research Paper

Published 20 Dec 2011

Full text

Self-assembly at solid surfaces

Sidney R. Cohen and
Jacob Sagiv

Beilstein J. Nanotechnol. 2011, 2, 824–825, doi:10.3762/bjnano.2.91

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Editorial

Published 20 Dec 2011

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