Measuring Adhesion on Rough Surfaces Using Atomic Force Microscopy with a Liquid Probe

Overview

Journal Beilstein J Nanotechnol

Specialty Biotechnology

Date 2017 May 16

PMID 28503393

Citations 1

Authors

Juan V Escobar

Cristina Garza

Rolando Castillo

Affiliations

Soon will be listed here.

Abstract

We present a procedure to perform and interpret pull-off force measurements during the jump-off-contact process between a liquid drop and rough surfaces using a conventional atomic force microscope. In this method, a micrometric liquid mercury drop is attached to an AFM tipless cantilever to measure the force required to pull this drop off a rough surface. We test the method with two surfaces: a square array of nanometer-sized peaks commonly used for the determination of AFM tip sharpness and a multi-scaled rough diamond surface containing sub-micrometer protrusions. Measurements are carried out in a nitrogen atmosphere to avoid water capillary interactions. We obtain information about the average force of adhesion between a single peak or protrusion and the liquid drop. This procedure could provide useful microscopic information to improve our understanding of wetting phenomena on rough surfaces.

Citing Articles

Estimation of rolling work of adhesion at the nanoscale with soft probing using optical tweezers.

Lokesh M, Vaippully R, Nalupurackal G, Roy S, Bhallamudi V, Prabhakar A RSC Adv. 2021; 11:34636-34642.

PMID: 34737851 PMC: 8546490. DOI: 10.1039/D1RA06960H.

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