Journal
LANGMUIR
Volume 35, Issue 51, Pages 16876-16885Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.9b03116
Keywords
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Funding
- AEI, MINECO [MAT2016-79866-R]
- Consejeria de Economia y Conocimiento de la Junta de Andalucia [US -1263142]
- EU through cohesion fund program
- EU through FEDER 20014-2020 program
- H2020 Phobic2lce project [690819]
- EU-H2020 research and innovation program [654360, 285]
- H2020 Societal Challenges Programme [690819] Funding Source: H2020 Societal Challenges Programme
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Herein, we present the development of supported organic nanofabrics formed by a conformal polymer-like interconnection of small-molecule organic nanowires and nanotrees. These organic nanostructures are fabricated by a combination of vacuum and plasma-assisted deposition techniques to generate step by step, single-crystalline organic nanowires forming one-dimensional building blocks, organic nanotrees applied as three-dimensional templates, and the polymer-like shell that produces the final fabric. The complete procedure is carried out at low temperatures and is compatible with an ample variety of substrates (polymers, metal, ceramics; either planar or in the form of meshes) yielding flexible and low solid-fraction three-dimensional nanostructures. The systematic investigation of this progressively complex organic nanomaterial delivers key clues relating their wetting, nonwetting, and anti-icing properties with their specific morphology and outer surface composition. Water contact angles higher than 150 degrees are attainable as a function of the nanofabric shell thickness with outstanding freezing-delay times (FDT) longer than 2 h at --5 degrees C. The role of the extremely low roughness of the shell surface is settled as a critical feature for such an achievement. In addition, the characteristic interconnected microstructure of the nanofabrics is demonstrated as ideal for the fabrication of slippery liquid-infused porous surfaces (SLIPS). We present the straightforward deposition of the nanofabric on laser patterns and the knowledge of how this approach provides SLIPS with FDTs longer than 5 h at -5 degrees C and 1 h at -15 degrees C.
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