Exploiting breath figure reversibility for <i>in situ</i> pattern modulation and hierarchical design

Dent, Francis J; Harbottle, David; Warren, Nicholas J.; Khodaparast, Sepideh

doi:10.1039/d2sm01650h

Cited by 3 publications

(1 citation statement)

References 69 publications

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“…[7,8,25] To date, the discovery of sustainable materials and affordable manufacturing methods for scalable fabrication of functional hydrophobic coatings remains an active field of academic and industrial research. [26][27][28][29][30][31] Inspirations for the design and fabrication of surfaces with desired fluid-handling functionalities have been largely drawn from natural models. [32] The abundance of plant leaves displaying interesting wetting behavior has guided the majority of development in the field since the discovery of the lotus effect.…”

Section: Introductionmentioning

confidence: 99%

Tuneable Topography and Hydrophobicity Mode in Biomimetic Plant‐Based Wax Coatings

Dent,

Tyagi,

Esat

et al. 2023

Adv Funct Materials

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Across diverse natural surfaces, remarkable interfacial functionalities emerge from micro and nanoscale self‐assemblies of wax components. The chemical composition of the epicuticular wax prescribes the intrinsic crystal morphology and resultant topography of the natural surfaces, dictating their interfacial wetting properties. The potential of regulating the topography of identical wax compositions through various crystallization routes is tested here. Crystallization through solvent evaporation produces diverse topographies with enhanced surface hydrophobicity compared to the slow cooling of the wax melt. Further, the microscale interfacial crystalline structure can be deliberately designed to operate in sticky or slippery hydrophobic regimes through control of the supersaturation level during the crystallization process. While the supersaturation level significantly impacts surface wettability by modulating the microscopic aggregation of rice bran wax crystals, the crystal structure at the molecular scale remains effectively unchanged. The relationships between the supersaturation level, surface topography and hydrophobicity modes, primarily derived for rice bran wax, are qualitatively validated for a wider range of plant‐based waxes. Crystallization of inherently hydrophobic plant‐based waxes from thermodynamically isotropic solutions offers an affordable single‐step approach for the fabrication of biodegradable hydrophobic coatings, applicable to versatile materials and geometries.

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Section: Introductionmentioning

confidence: 99%

Tuneable Topography and Hydrophobicity Mode in Biomimetic Plant‐Based Wax Coatings

Dent,

Tyagi,

Esat

et al. 2023

Adv Funct Materials

Self Cite

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Dynamic breath figure template for electrohydrodynamic lithography: Formation of multiscale micro-craters and wells

Roy,

Murmu,

Gooh Pattader

2024

Surfaces and Interfaces

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Cryogenic quenching process enhancement through coating and microstructure optimization

Graffiedi,

Dent,

Khodaparast

et al. 2024

J. Phys.: Conf. Ser.

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In this work, we explore the impact of coatings and microstructures on heat transfer during a cryogenic quenching process. An easily reproducible quenching test is presented as a benchmark for testing different solutions. The study involves two different flat polymeric coatings as well as three porous microstructures. The results show that pairing a low-conductive coating with an appropriate porous surface microstructure on top of a stainless-steel plate can reduce the chill down time, accelerating the transition from room temperature to liquid nitrogen temperature, by a factor of five. High speed video recordings have been used to analyse the quenching process with different coatings and microstructures showing how the suppression of the film boiling regime is the key to enhancing the quenching process.

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Exploiting breath figure reversibility for in situ pattern modulation and hierarchical design

Abstract: The breath figure (BF) method employs condensation droplets as dynamic templates for patterning polymer films. In the classical approach, dropwise condensation and film solidification are simultaneously induced through solvent evaporation,...

Cited by 3 publications

References 69 publications

Tuneable Topography and Hydrophobicity Mode in Biomimetic Plant‐Based Wax Coatings

Tuneable Topography and Hydrophobicity Mode in Biomimetic Plant‐Based Wax Coatings

Dynamic breath figure template for electrohydrodynamic lithography: Formation of multiscale micro-craters and wells

Cryogenic quenching process enhancement through coating and microstructure optimization

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