8/4/2023 0 Comments Precipitate solution![]() MN ( Figure 4d) surfaces, the crystals do not spread because of the surface patterning boundary.On the B/N surface, the precipitation proceeds from the BS to the NS and the crystal growth continues ( Figure 4a). As in the previous experiments, precipitation proceeded along the surface of the BS and NS in contrast, it did not spread on the MS and MNS. The growth of salt precipitation on the patterned surfaces of B MN) patterned surfaces were manufactured using an acid-corrosion-resistant Kapton tape.The BS and MS of the aluminum oxide film with relatively low surface energy have high WCAs ( Figure 1a,c), while the NS and MNS of aluminum hydroxide surface with high surface energy have very low WCAs ( Figure 1b,d). WCA refers to the angle formed by solid specimens and 5 μm deionized (DI) water droplets in the atmosphere at room temperature. This result can be verified by measuring the water CAs (WCAs). In contrast, an aluminum hydroxide layer was formed on NS and MNS, showing the presence of Mg and O components ( Figure 1f,h). ![]() Only Al and Mg components were detected when the surface components were analyzed by energy-dispersive spectrometry (EDS) because an aluminum oxide film was formed on both BS and MS ( Figure 1e–g). The approximate structure sizes of the NS and MS are 100 nm and 1 μm, respectively. The microcubic structure is well-formed on both microstructured surfaces (MS) and micro/nanostructured surface (MNS) ( Figure 1c,d, respectively). The bare surface (BS) has a clean surface ( Figure 1a), while the nanostructured surface (NS) has a structure comprising nanoflakes ( Figure 1b). The structure of each surface was observed by scanning electron microscopy (SEM), and the results are shown in Figure 1. We believe that this novel approach may prove useful in solving the problems caused by precipitation. When the same experiment was conducted on surfaces made by patterning different structural surfaces, the precipitates did not spread on the surface with microscale structures. On bare and nanostructured surfaces, NaCl deposits as a flat layer on the surface, while on micro and micro/nanostructured surfaces, it forms a thick deposit in a direction perpendicular to the surface. Bare, nanostructured, microstructured, and micro/nanostructured surfaces were immersed in the same saturated aqueous NaCl solution, and the heights at which precipitation occurred in the different specimens were compared. Herein, we propose a method to control the precipitation direction by changing the structures and properties of the solid surface. However, it causes pipe clogging in industrial sites, which can be resolved by controlling the direction of precipitation. Precipitation is a well-known phenomenon commonly observed in salt ponds.
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