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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Near-Infrared Promoted Wettability Recovery of Superhydrophilic ZnO
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Near-Infrared Promoted Wettability Recovery of Superhydrophilic ZnO

机译：近红外促进超硫酸ZnO的润湿性回收

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摘要

Superhydrophilic and superhydrophobic surfaces exhibit numerous industrial applications such as self-cleaning, antifogging, anti-icing, electrowetting, and photocatalysis. A surface with reversible wetting behaviors that can be controlled by external field is both scientifically and technologically of importance. Light is a major external trigger for many natural processes. We report here an intelligent remote technology based on alternative UV and near-infrared (NIR) irradiation that enables dynamical wettability tuning of ZnO wafers. Notably, NIR irradiation with a moderate power density of 500 +/- 5 mW/cm(2) can rapidly recover patterned ZnO from the UV-induced superhydrophilic state (<5 degrees) to the original state (125 +/- 3 degrees) in just 2 h. We discover that the chemical environments of O 1s and Zn 2p electrons exhibit a back-and-forth shift upon UV and NIR irradiation, respectively. The NIR-promoted wettability recovery is attributed to selective actuation of vibrational overtone transitions of hydroxyl (OH) band and background absorption of water in the NIR region. Our results highlight that oxygen and water in air are two crucial factors in determining the wettability recovery process, which could be selectively activated or deactivated by remote optical sources. We expect that this discovery could help us to understand many natural processes and shed light on the design of novel devices.
机译：超硫酸和超疏水表面表现出许多工业应用，如自清洁，防雾，防冰，电润湿和光催化。具有可通过外部场控制的可逆润湿行为的表面在科学和技术上都是重要的。光是许多自然过程的主要外部触发。我们在此报告了基于替代紫外线和近红外（NIR）辐射的智能遥控技术，其能够进行ZnO晶片的动态润湿性调整。值得注意的是，具有500 +/- 5mW / cm（2）的中等功率密度的NIR照射可以从UV诱导的超硫酸态（<5度）到原始状态（125 +/- 3度）快速恢复图案化ZnO只需2小时。我们发现O 1S和Zn 2P电子的化学环境分别在UV和NIR辐射时表现出前后偏移。 NIR促进的润湿性恢复归因于选择性致动氢气（OH）带的振动泛穴转变和NIR区域中的水的背景吸收。我们的结果强调，空气中的氧气和水是确定润湿性回收过程中的两个关键因素，这可以通过远程光源选择性地激活或取消激活。我们预计这一发现可以帮助我们理解许多自然过程和揭示新颖设备的设计。

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    Zhao Dongfang; Jia Ran; Gao Naikun; Yan Weishan; Zhang Ling; Li Xi; Liu Duo;

  • 作者单位

    Shandong Univ State Key Lab Crystal Mat 27 South Shanda Rd Jinan 250100 Shandong Peoples R China;

    Shandong Univ State Key Lab Crystal Mat 27 South Shanda Rd Jinan 250100 Shandong Peoples R China;

    Shandong Univ State Key Lab Crystal Mat 27 South Shanda Rd Jinan 250100 Shandong Peoples R China;

    Shandong Univ State Key Lab Crystal Mat 27 South Shanda Rd Jinan 250100 Shandong Peoples R China;

    Shandong Univ State Key Lab Crystal Mat 27 South Shanda Rd Jinan 250100 Shandong Peoples R China;

    Shandong Univ Key Lab Expt Teratol Minist Educ Inst Med Genet Sch Med Jinan 250012 Shandong Peoples R China;

    Shandong Univ State Key Lab Crystal Mat 27 South Shanda Rd Jinan 250100 Shandong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 物理化学（理论化学）、化学物理学;
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