Abstract
The contact between a spherical nanoparticle and a planar substrate is surrounded by an annular wedge cavity. In adsorption processes, this acts like a small pore. Interfacial/capillarity effects lead to an accumulation of adsorbate in this region ("capillary condensation"). This effectively increases the contact area between the particles and the substrate. Thus, capillary-enhanced adsorbate accumulation increases the adhesion between the nanoparticles and the planar surface, which effectively immobilizes the particles.
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