Transparent and Robust Amphiphobic Surfaces Exploiting Nanohierarchical Surface-grown Metal–Organic Frameworks
Autor: | Vikramjeet Singh, Manish K. Tiwari, Xuehu Men |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Materials science
Letter Amphiphobic surface Bioengineering Nanotechnology 02 engineering and technology Surface tension nanohierarchy Weber number General Materials Science Thermal stability transparent surface Nanoscopic scale Alkyl chemistry.chemical_classification Mechanical Engineering Drop (liquid) General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics chemistry ice adhesion Surface modification Metal-organic framework metal−organic frameworks 0210 nano-technology pollution cleaning |
Zdroj: | Nano Letters |
ISSN: | 1530-6992 1530-6984 |
Popis: | Highly amphiphobic (repelling both water and low surface tension liquids) and optically transparent surface treatments have widespread demand. By combining a rational growth of metal-organic frameworks (MOFs) with functionalization by environmentally safe, flexible alkyl groups, here we present surfaces with nanohierarchical morphology, comprising two widely differing nanoscale features. These nanohierarchical MOF films show excellent amphiphobicity. We further present three key features. First, we demonstrate the need to use flexible alkyl chains to achieve low drop sliding angles and self-cleaning. Second, our thin (∼200 nm) MOF films display excellent optical transparency and robustness. Third, the nanohierarchical morphology enables a unique combination of additional desirable properties, e.g., resistance to high-speed liquid impact (up to ∼35 m/s, Weber number >4 × 104), thermal stability up to 200 °C, scratch resistance, low ice adhesion for >10 icing/deicing cycles, stability in harsh acidic and basic environments, and capability to remove carcinogenic pollutants from water. |
Databáze: | OpenAIRE |
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