Direct Measurement of Interaction Forces between Surfaces in Liquids Using Atomic Force Microscopy

Ishida, Naoyuki; Craig, Vincent S. J.

doi:10.14356/kona.2019013

Cited by 20 publications

(13 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, if so desired, more sophisticated AFM force measurements are capable of discerning the identity of the liquid. Immersed liquids adjacent to solid surfaces exhibit either a short-ranged (∼nm) repulsion or attraction, , while ionic liquids with relatively large molecules can present discrete steps over a distance of several nanometers. − …”

mentioning

confidence: 99%

Direct Measurement of the Contents, Thickness, and Internal Pressure of Molybdenum Disulfide Nanoblisters

et al. 2020

View full text Add to dashboard Cite

Nanoblisters have attracted attention due to their ability to controllably modulate the properties of two-dimensional materials. The accurate measurement or estimation of their properties is nontrivial and largely based on Hencky's theory. However, these estimates require a priori knowledge of material properties and propagate large errors. Here we show, through a systematic atomic force microscopy study, several strategies that lead to vastly enhanced characterization of nanoblisters. First, we find that nanoblisters may contain both liquid and gas, resolving an ongoing debate in the literature. Second, we demonstrate how to definitively determine the membrane thickness of a nanoblister and show that Hencky's theory can only reliably predict membrane thicknesses for small aspect ratios and small membrane thicknesses. Third, we develop a novel technique to measure the internal pressures of nanoblisters, which quantitatively agrees with Hencky's theory but carries a 1 order smaller propagated error. KEYWORDS: nanoblisters, MoS 2 , contents, thickness, internal pressure, atomic force microscope contain only gas, 16−20 and another assumes they contain 48 only liquid. 21 Some in the latter camp suggest 21 that the more 49 widely used assumption that the blisters contain gas leads to a 50 systematic underestimation of adhesion values. It is clear that 51 an authoritative estimate of adhesion requires a technique to 52 discern the identity of the nanoblisters' contents. 53 Second, the bending and stretching energy of a nanoblister is 54 sensitive to the precise number of layers that comprise the 55 blister's membrane, but the layer number is unfortunately 56 challenging to determine. Typical approaches to measure 57 membrane thicknesses include optical transmittance, photo-58 luminescence, or Raman signatures of cleaved membranes 22−24 59 through whole films of 2D materials. However, these 60 approaches lack the capability to resolve thicknesses of blisters 61 delaminating off a bulk substrate, do not generalize for films 62 larger than a few layers, and are diffraction limited, precluding 63 the ability to probe individual nanoblisters. 64 In this Letter, we demonstrate a path toward overcoming 65 these challenges by using the unique modalities of atomic force

show abstract

mentioning

confidence: 99%

Direct Measurement of the Contents, Thickness, and Internal Pressure of Molybdenum Disulfide Nanoblisters

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The ionic strength of a fluid is somewhat an unknown. However, works have indicated that for deionized water, typical ionic strength values are measured of the order of I = 1 mol/m 3 46 . This value is assumed for all the fluids used.…”

Section: Methodsmentioning

confidence: 99%

Surface tension of nanoparticle dispersions unravelled by size-dependent non-occupied sites free energy versus adsorption kinetics

Machrafi

2022

npj Microgravity

View full text Add to dashboard Cite

The surface tension of dispersions presents many types of behaviours. Although some models, based on classical surface thermodynamics, allow partial interpretation, fundamental understanding is still lacking. This work develops a single analytical physics-based formulation experimentally validated for the surface tension of various pure nanoparticle dispersions, explaining the underlying mechanisms. Against common belief, surface tension increase of dispersions appears not to occur at low but rather at intermediate surface coverage, owed by the relatively large size of nanoparticles with respect to the fluid molecules. Surprisingly, the closed-form model shows that the main responsible mechanism for the various surface tension behaviours is not the surface chemical potential of adsorbed nanoparticles, but rather that of non-occupied sites, triggered and delicately controlled by the nanoparticles ‘at a distance’, introducing the concept of the ‘non-occupancy’ effect. The model finally invites reconsidering surface thermodynamics of dispersions and provides for criteria that allow in a succinct manner to quantitatively classify the various surface tension behaviours.

show abstract

“…By AFM, it is not possible to record the entire interaction potential between tip and object, since the cantilever imposes an external force that makes the system "jump to contact" at a certain distance above the surface. 199 However, the AFM can nevertheless help to identify the different forces, if individual parameters (e.g., salt concentration or wettability) can be varied separately. 200 Indirectly, by recording the topography of a thin polymer film, AFM helped to reveal the effective interface potential of the system air/thin polymer film/silicon wafer, which can be described by a Lennard-Jones-type potential in the appropriate geometry (two flat semi-infinite interfaces interact) possible: 201,202 at temperatures above the glass transition temperature (here T > 480 K), the thin polystyrene film can dewet spinodally under certain conditions off a Si wafer.…”

Section: Insights Into Intermolecular Interactions By Surface Forces ...mentioning

confidence: 99%

Perspectives on weak interactions in complex materials at different length scales

Fiedler

Berland

Borchert

et al. 2023

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

Direct Measurement of Interaction Forces between Surfaces in Liquids Using Atomic Force Microscopy

Cited by 20 publications

References 81 publications

Direct Measurement of the Contents, Thickness, and Internal Pressure of Molybdenum Disulfide Nanoblisters

Direct Measurement of the Contents, Thickness, and Internal Pressure of Molybdenum Disulfide Nanoblisters

Surface tension of nanoparticle dispersions unravelled by size-dependent non-occupied sites free energy versus adsorption kinetics

Perspectives on weak interactions in complex materials at different length scales

Contact Info

Product

Resources

About