Probing Material Properties II: Adhesive Nanomechanics and Mapping Distance‐Dependent Interactions

Haugstad, Greg

doi:10.1002/9781118360668.ch6

Cited by 4 publications

(1 citation statement)

References 95 publications

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“…The AFM force-curves are conducted at a rate of 2 kHz allowing a contact of both surfaces in the order of the milliseconds [38–39] at ambient temperature (20 °C) and relative humidity around 35 ± 5%. A pure equilibrium state ensuring the constant formation of the water meniscus might be difficult to reach all the time as these values are at the formation limit, as discussed by Haugstad et al [39]; however, it is still possible and it can explain the large spread of adhesion values obtained for –NH 2 and –SH coated NPs. The capillary forces also depend on the size and shape of the particles, and longer contact times may contribute to the increase of these interaction forces.…”

Section: Resultsmentioning

confidence: 99%

Tuning adhesion forces between functionalized gold colloidal nanoparticles and silicon AFM tips: role of ligands and capillary forces

Oras

Vlassov

Berholts

et al. 2018

Beilstein J. Nanotechnol.

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Adhesion forces between functionalized gold colloidal nanoparticles (Au NPs) and scanning probe microscope silicon tips were experimentally investigated by atomic force microscopy (AFM) equipped with PeakForce QNM (Quantitative Nanoscale Mechanics) module. Au NPs were synthesized by a seed-mediated process and then functionalized with thiols containing different functional groups: amino, hydroxy, methoxy, carboxy, methyl, and thiol. Adhesion measurements showed strong differences between NPs and silicon tip depending on the nature of the tail functional group. The dependence of the adhesion on ligand density for different thiols with identical functional tail-group was also demonstrated. The calculated contribution of the van der Waals (vdW) forces between particles was in good agreement with experimentally measured adhesive values. In addition, the adhesion forces were evaluated between flat Au films functionalized with the same molecular components and silicon tips to exclude the effect of particle shape on the adhesion values. Although adhesion values on flat substrates were higher than on their nanoparticle counterparts, the dependance on functional groups remained the same.

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Section: Resultsmentioning

confidence: 99%

Tuning adhesion forces between functionalized gold colloidal nanoparticles and silicon AFM tips: role of ligands and capillary forces

Oras

Vlassov

Berholts

et al. 2018

Beilstein J. Nanotechnol.

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AFM-IR: Technology and Applications in Nanoscale Infrared Spectroscopy and Chemical Imaging

2016

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Atomic force microscopy-based infrared spectroscopy (AFM-IR) is a rapidly emerging technique that provides chemical analysis and compositional mapping with spatial resolution far below conventional optical diffraction limits. AFM-IR works by using the tip of an AFM probe to locally detect thermal expansion in a sample resulting from absorption of infrared radiation. AFM-IR thus can provide the spatial resolution of AFM in combination with the chemical analysis and compositional imaging capabilities of infrared spectroscopy. This article briefly reviews the development and underlying technology of AFM-IR, including recent advances, and then surveys a wide range of applications and investigations using AFM-IR. AFM-IR applications that will be discussed include those in polymers, life sciences, photonics, solar cells, semiconductors, pharmaceuticals, and cultural heritage. In the Supporting Information , the authors provide a theoretical section that reviews the physics underlying the AFM-IR measurement and detection mechanisms.

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Capillary Forces in Nanoparticle Adhesion: A Review of AFM Methods

Harrison

Corti

Beaudoin

2015

Particulate Science and Technology

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Probing Material Properties II: Adhesive Nanomechanics and Mapping Distance‐Dependent Interactions

Cited by 4 publications

References 95 publications

Tuning adhesion forces between functionalized gold colloidal nanoparticles and silicon AFM tips: role of ligands and capillary forces

Tuning adhesion forces between functionalized gold colloidal nanoparticles and silicon AFM tips: role of ligands and capillary forces

AFM-IR: Technology and Applications in Nanoscale Infrared Spectroscopy and Chemical Imaging

Capillary Forces in Nanoparticle Adhesion: A Review of AFM Methods

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