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Nanoparticle Adhesion at Liquid Interfaces [dataset] Open Access

Nanoparticle adhesion at liquid interfaces plays an important role in drug delivery, dust removal, the adsorption of aerosols, and controlled self-assembly. However, quantitative measurements of capillary interactions at the nanoscale are challenging, with most existing results at the micrometre to millimetre scale. Here, we combine atomic force microscopy (AFM) and computational simulations to investigate the adhesion and removal of nanoparticles from liquid interfaces as a function of the particles’ geometry and wettability. Experimentally, AFM tips with controlled conical geometries are used to mimic the nano-asperities on natural nanoparticles interacting with silicone oil, a model liquid for many engineering applications including liquid-infused surfaces. Computationally, continuum modelling with the Surface Evolver software allows us to visualise the interface configuration and predict the expected force profile from energy minimisation. Quantitative agreement between the experimental measurements and the computational simulations validate the use of continuum thermodynamics concepts down to the nanoscale. We demonstrate that the adhesion of the nanoparticles is primarily controlled by surface tension, with minimum line tension contribution. The particle geometry is the main factor affecting the length of the capillary bridge before rupture. Both the particle geometry and liquid contact angle determine the shape of the adhesion force profile upon removal of the particle from the interface. We further extend our simulations to explore more complex geometries, rationalising the results from experiments with imperfect AFM tips. Our results could help towards the design of smart interfaces, for example, able to attract or repel specific particles based on their shape and chemistry.

Descriptions

Resource type

Dataset

Contributors

Creator: Sun, Ke ¹
Contact person: Voitchovsky, Kislon ¹
Data curator: Voitchovsky, Kislon ¹
Contact person: Kusumaatmaja, Halim ²

¹ Durham University, UK
² Edinburgh University, UK

Funder

Engineering and Physical Sciences Research Council
Leverhulme Trust

Research methods

Other description

Includes research data and Python code.

Keyword

Capillary Forces
Atomic Force Microscopy
Surface Evolver Computer Simulations
Nanoparticles
Liquid Interfaces

Subject

Nanoparticles

Location

Language

Cited in

Identifier

ark:/32150/r2rx913p95d
doi:10.15128/r2rx913p95d

Rights

Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC)

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

File Details

Depositor

K.D. Voitchovsky

Date Uploaded

16 September 2024, 08:09:54

Date Modified

20 September 2024, 09:09:25

Audit Status

Audits have not yet been run on this file.

Characterization

File format: zip (ZIP Format)

Mime type: application/zip

File size: 66309143

Last modified: 2024:09:20 09:51:19+01:00

Filename: Data_Nanoparticle_Adhesion_at_Liquid_Interfaces.zip

Original checksum: f65d1e7243ea49e069cd5e220301d69d