4.6 Article

Photo-Detachable Self-Cleaning Surfaces Inspired by Gecko Toepads

期刊

LANGMUIR
卷 37, 期 28, 页码 8410-8416

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.1c00568

关键词

-

资金

  1. National Nature Science Foundation of China [51875577]
  2. Science Foundation of China University of Petroleum-Beijing [2462020XKJS01]
  3. U.S. National Science Foundation [2004251]
  4. Direct For Mathematical & Physical Scien
  5. Division Of Materials Research [2004251] Funding Source: National Science Foundation

向作者/读者索取更多资源

Research combining TDPDA and PDMS micropillars has achieved high adhesion and self-cleaning performance, with effective self-cleaning mechanism controlled by light signals. By absorbing 808 nm wavelength light for heating and completing the self-cleaning process in a short time, this study may open new applications for biomimetic smart surfaces.
Strong, reversible, and self-cleaning adhesion in the toe pads of geckos allow the lizards to climb on a variety of vertical and inverted surfaces, regardless of the surface conditions, whether hydrophobic or hydrophilic, smooth or tough, wet or dry, clean or dirty. Development of synthetic gecko-inspired surfaces has drawn a great attention over the past two decades. Despite many external-stimuli responsive mechanisms (i.e., thermal, electrical, magnetic) have been successfully demonstrated, smart adhesives controlled by light signals still substantially lag behind. Here, in this report, we integrate tetramethylpiperidinyloxyl (TEMPO)-doped polydopamine (PDA), namely, TDPDA, with PDMS micropillars using a template-assisted casting method, to achieve both improved adhesion and self-cleaning performances. To the best of our knowledge, this is the first report on PDA being used as a doping nanoparticle in bioinspired adhesive surfaces to achieve highly efficient self-cleaning controllable by light signals. Notably, the adhesion of the 5% TDPDA-PDMS sample is similar to 688.75% higher than that of the pure PDMS at the individual pillar level, which helps to explain the highly efficient self-cleaning mechanism. The sample surfaces (named TDPDA-PDMS) can efficiently absorb 808 nm wavelength of light and heat up from 25 degrees C to 80.9 degrees C in 3 min with NIR irradiation. The temperature rise causes significant reduction of adhesion, which results in outstanding self-cleaning rate of up to 55.8% within five steps. The exploration of the photoenabled switching mechanism with outstanding sensitivity may bring the biomimetic smart surfaces into a new dimension, rendering varied applications, e.g., in miniaturized climbing robot, artificial intelligence programmable manipulation/assembly/filtration, active self-cleaning solar panels, including high output sensors and devices in many engineering and biomedical frontiers.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据