Adhesion mechanisms on solar glass: Effects of relative humidity, surface roughness, and particle shape and size

Moutinho, H. R.; Jiang, Chun‐Sheng; To, Bobby; Perkins, Craig L.; Muller, Matthew; Al‐Jassim, M. M.; Simpson, Lin

doi:10.1016/j.solmat.2017.07.026

Cited by 92 publications

(68 citation statements)

References 20 publications

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“…Atomic force microscopy has allowed the effect of RH on particle adhesion to be carefully investigated (Jones et al 2002;Curry and Kim 2004;Moutinho et al 2017). Typically, capillary adhesion of particles to glass surfaces is reported to commence at RH of »30-50%, strengthen greatly when it reaches 60-70%, and sometimes weaken again near saturation as the water film becomes highly mobile (Picotti et al 2017;Jones et al 2002;Brambilla et al 2017;Busnaina and Elsawy 2000;Zimon 1969).…”

Section: Resuspensionmentioning

confidence: 99%

Dominant environmental parameters for dust deposition and resuspension in desert climates

Figgis

Guo

Javed

et al. 2018

Aerosol Science and Technology

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Field studies of dry deposition usually measure dust accumulation over periods of days or weeks. However, long measurement periods obscure the effects of meteorological conditions on the deposition rate. Previously we developed an "outdoor soiling microscope" (OSM) in order to measure dust deposition and detachment every 10 min in the field. In this study a greased/ ungreased pair of OSMs was deployed for 51 days in the desert climate of Doha, Qatar. Stepwise regression analysis was performed to quantify the explanatory power of meteorological parameters on dust deposition and detachment rates. It was found that wind speed dominated deposition and rebound of dust particles, and produced a distinctive "threshold" response in deposition. The dry deposition results were highly consistent with a model by Kim et al. (2000) derived from outdoor experiments. By comparison, relative humidity and particulate matter concentration had less influence on dust flux rates.

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Section: Resuspensionmentioning

confidence: 99%

Dominant environmental parameters for dust deposition and resuspension in desert climates

Figgis

Guo

Javed

et al. 2018

Aerosol Science and Technology

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“…In general, as the surface roughness increases, the adhesion force decreases. This trend has been reported in several studies [20][21][22][23]. The exact effect of roughness can be studied based upon its impact on the two main forces that control the mechanism of soiling: Van der Waals and the capillary force.…”

Section: Resultsmentioning

confidence: 52%

Theoretical and Experimental Characterization of Efficient Anti-Dust Coatings under Desert Conditions

Isaifan¹,

Johnson²,

Mansour³

et al. 2018

JTFR

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Transparent titania coatings have self-cleaning and anti-reflection properties (AR) that are of great importance in optical and solar applications. In this work, an efficient and easy to scale up adsorptive self-assembly process is used to coat glass substrates with two TiO2 nanocolloids (TC-1 and TC-2) prepared via polyol method. TEM images of the nanoparticles show an average particle size of 2.6 and 167.7 nm of TC-1 and TC-2, respectively. The theoretical values for the coating thickness as well as for the antireflective index were compared with the experimental values obtained via elipsometer measurements. The self-cleaning properties were investigated by optical microscopy, atomic force microscopy, contact angle, surface tension and UV-vis spectroscopy. The optical images show 56% reduction of dust deposition rate with lower adhesion force over the best performing coated surfaces TC-1 compared with bare glass substrates and TC-2 after 7 days of soiling.

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“…Thus, the increase in wind force with particle size increases, and, on average, larger particles will be more susceptible to be removed by wind when only van der Waals and capillary forces are in effect. 30 Similar experiments were performed on the surface of different materials and PV glass with different coatings (e.g., Teflon, ultraviolet-treated Si, three different commercial coatings, and different inhouse coatings). The key difference among these different coatings/materials is the wide range of "surface energy" as measured by water contact angle.…”

Section: Initial Soiling Adhesionmentioning

confidence: 99%

Addressing Soiling: From Interface Chemistry to Practicality

Simpson

2020

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Adhesion mechanisms on solar glass: Effects of relative humidity, surface roughness, and particle shape and size

Cited by 92 publications

References 20 publications

Dominant environmental parameters for dust deposition and resuspension in desert climates

Dominant environmental parameters for dust deposition and resuspension in desert climates

Theoretical and Experimental Characterization of Efficient Anti-Dust Coatings under Desert Conditions

Addressing Soiling: From Interface Chemistry to Practicality

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