The Self-Cleaning Mechanism: Why Nanotexture and Hydrophobicity Matter.

@article{Heckenthaler2019TheSM,
  title={The Self-Cleaning Mechanism: Why Nanotexture and Hydrophobicity Matter.},
  author={Tabea Heckenthaler and Sumesh Sadhujan and Yakov Morgenstern and Prakash Natarajan and Muhammad Y. Bashouti and Yair Kaufman},
  journal={Langmuir : the ACS journal of surfaces and colloids},
  year={2019}
}
Dust particles can adhere to surfaces, thereby decreasing the efficiency of diverse processes, such as light absorption by solar panels. It is well known that super-hydrophobicity reduces the friction between water droplets and the surface, thus, allowing water drops to slide/roll and detach (clean) particles from surfaces. However, the forces that attach and detach particles from surfaces during the self-cleaning mechanism, and the effect of nanotextures on these forces, are not fully… 
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References

SHOWING 1-10 OF 26 REFERENCES
Wetting and self-cleaning properties of artificial superhydrophobic surfaces.
The wetting and the self-cleaning properties (the latter is often called the "Lotus-Effect") of three types of superhydrophobic surfaces have been investigated: silicon wafer specimens with different
Biomimetic self-cleaning surfaces: synthesis, mechanism and applications
TLDR
The review gives a succinct account of the detailed mechanisms and biomimetic processes applied to create artificial self-cleaning materials and surfaces, and provides some examples of cutting-edge applications such as anti-reflection, water repellence, self-healing, anti-fogging and micro-manipulators.
Forces acting on a single particle in an evaporating sessile droplet on a hydrophilic surface.
TLDR
To elucidate the impact of various forces including the drag, electrostatic, van der Waals, and surface tension forces on the particle motion in suspension, the magnitudes of them are compared using the scale analysis.
Evaporative deposition of polystyrene microparticles on PDMS surface
TLDR
A mechanism of self-pinning of microparticles was used to elucidate the deposition behavior ofmicroparticles, indicating that as the contact line is depinning, the liquid film covering the outmost microparticle becomes thicker and thicker, and the microp articles have to move spontaneously with the depinning contact line under the action of capillary force.
Interaction of bi-dispersed particles with contact line in an evaporating colloidal drop
The deposition behavior of an inkjet-printed aqueous colloidal mixture of micro- and nanoparticles onto a glass substrate with systematically varied wettability has been investigated using
Detachment of deposited colloids by advancing and receding air-water interfaces.
TLDR
The objective of this study was to quantify the effects of advancing and receding air-water interfaces on colloid detachment as a function of interface velocity, and confirm that the detachment forces during the advancing air- water interface movement were stronger than during the receding movement.
Purity of the sacred lotus, or escape from contamination in biological surfaces
TLDR
It is shown here for the first time that the interdependence between surface roughness, reduced particle adhesion and water repellency is the keystone in the self-cleaning mechanism of many biological surfaces.
Contact Angle and Adhesion Dynamics and Hysteresis on Molecularly Smooth Chemically Homogeneous Surfaces.
TLDR
The theoretical and experimental methods and results unify previous kinetic theories of adhesion and contact angle hysteresis and offer new experimental methods for testing kinetic models in the thermodynamic, quasi-static, limit.
Morphology and natural wettability properties of sol-gel derived TiO2-SiO2 composite thin films
Previous studies suggest that granular interfaces induce a natural and persistent super-hydrophilicity in TiO2–SiO2 composite thin films deposited by sol–gel route. This effect enables to consider
Normal capillary forces.
  • H. Butt, M. Kappl
  • Chemistry, Medicine
    Advances in colloid and interface science
  • 2009
TLDR
Normal capillary forces are reviewed, focusing on a quantitative description with continuum theory, and the process of meniscus formation is described, including the influence of surface roughness.
...
1
2
3
...