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首页> 美国卫生研究院文献>Nanomaterials >Wettability of Y2O3: A Relative Analysis of Thermally Oxidized Reactively Sputtered and Template Assisted Nanostructured Coatings
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Wettability of Y2O3: A Relative Analysis of Thermally Oxidized Reactively Sputtered and Template Assisted Nanostructured Coatings

机译：Y2O3的润湿性：热氧化反应溅射和模板辅助纳米结构涂层的相对分析

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The wettability of reactively sputtered Y2O3, thermally oxidized Y-Y2O3 and Cd-CdO template assisted Y2O3 coatings has been studied. The wettability of as-deposited Y2O3 coatings was determined by contact angle measurements. The water contact angles for reactively sputtered, thermally oxidized and template assisted Y2O3 nanostructured coatings were 99°, 117° and 155°, respectively. The average surface roughness values of reactively sputtered, thermally oxidized and template assisted Y2O3 coatings were determined by using atomic force microscopy and the corresponding values were 3, 11 and 180 nm, respectively. The low contact angle of the sputter deposited Y2O3 and thermally oxidized Y-Y2O3 coatings is attributed to a densely packed nano-grain like microstructure without any void space, leading to low surface roughness. A water droplet on such surfaces is mostly in contact with a solid surface relative to a void space, leading to a hydrophobic surface (low contact angle). Surface roughness is a crucial factor for the fabrication of a superhydrophobic surface. For Y2O3 coatings, the surface roughness was improved by depositing a thin film of Y2O3 on the Cd-CdO template (average roughness = 178 nm), which resulted in a contact angle greater than 150°. The work of adhesion of water was very high for the reactively sputtered Y2O3 (54 mJ/m2) and thermally oxidized Y-Y2O3 coatings (43 mJ/m2) compared to the Cd-CdO template assisted Y2O3 coating (7 mJ/m2).
机译：研究了反应溅射Y2O3，热氧化Y-Y2O3和Cd-CdO模板辅助Y2O3涂层的润湿性。通过接触角测量来确定沉积的Y2O3涂层的润湿性。反应溅射，热氧化和模板辅助的Y2O3纳米结构涂层的水接触角分别为99°，117°和155°。通过原子力显微镜测定反应溅射，热氧化和模板辅助的Y2O3涂层的平均表面粗糙度值，相应的值分别为3、11和180 nm。溅射沉积的Y2O3和热氧化的Y-Y2O3涂层的低接触角归因于紧密堆积的纳米晶粒状微观结构，没有任何空隙，从而导致较低的表面粗糙度。相对于空隙空间，此类表面上的水滴大多与固体表面接触，从而导致疏水性表面（低接触角）。表面粗糙度是制造超疏水表面的关键因素。对于Y 2 O 3 涂层，通过沉积Y 2 O 3 薄膜可以改善表面粗糙度在Cd-CdO模板上（平均粗糙度= 178 nm），其接触角大于150°。活性溅射Y 2 O 3 （54 mJ / m 2 ）和热氧化YY <与Cd-CdO模板辅助的Y 2 O <相比，sub> 2 O 3 涂层（43 mJ / m 2 ） sub> 3 涂层（7 mJ / m 2 ）。

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