Inspired by the wax regeneration ability of plant leaves and the slippery surfaces of the Nepenthes pitcher plants, we have developed a new form of cross-species bioinspired slippery liquid-infused porous surfaces (X-SLIPS) that can self-repair under thermal stimulation even under large-area physical and chemical damage. The performance and underlying mechanism of the thermal-healing property has been studied and characterized in detail. These thermally self-healing omniphobic coatings can be applied to a broad range of metals, plastics, glass, and ceramics of various shapes and show excellent repellency toward aqueous and organic liquids.
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http://dx.doi.org/10.1021/acsami.6b00194 | DOI Listing |
ACS Nano
January 2025
Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States.
Despite the numerous advantages demonstrated by microfluidic mixing for RNA-loaded lipid nanoparticle (RNA-LNP) production over bulk methods, such as precise size control, homogeneous distributions, higher encapsulation efficiencies, and improved reproducibility, their translation from research to commercial manufacturing remains elusive. A persistent challenge hindering the adoption of microfluidics for LNP production is the fouling of device surfaces during prolonged operation, which significantly diminishes performance and reliability. The complexity of LNP constituents, including lipids, cholesterol, RNA, and solvent mixtures, makes it difficult to find a single coating that can prevent fouling.
View Article and Find Full Text PDFAdv Funct Mater
September 2024
School of Chemical, Materials and Biomedical Engineering, University of Georgia, Athens, Georgia, 30602, United States of America.
Covalent and defect-free surface-grafted solid lubricating chains that can impart slippery behavior have proven advantageous over lubricant infused and textured anti-wetting surfaces. Herein, the co-hydrolysis and co-condensation of a mixture of organosilanes followed by the epoxy-amine ring opening reaction at the interface results in a highly robust, transparent and solid slippery omniphobic coating (LL-OSC). The presence of the epoxy-terminated organosilane a) acts as a molecular spacer in between the low-surface energy, rigid fluorine terminated silane and b) provides 'reactive' epoxy groups for covalent binding to a pre-functionalized amine surface for potential applicability in droplet transport and manipulation, diagnostics etc.
View Article and Find Full Text PDFSmall
November 2024
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.
Beilstein J Nanotechnol
November 2024
School of Chemical Biological and Environmental Engineering, Oregon State University, Corvallis, OR 97331, USA.
One biomimetic approach to surface passivation involves a series of surface coatings based on the slick surfaces of carnivorous pitcher plants (Nepenthes), termed slippery liquid-infused porous surfaces (SLIPS). This study introduces a simplified method to produce SLIPS using a polydopamine (PDA) anchor layer, inspired by mussel adhesion. SLIPS layers were formed on cyclic olefin copolymer, silicon, and stainless steel substrates, by first growing a PDA film on each substrate.
View Article and Find Full Text PDFNat Commun
September 2024
School of Energy and Environment, City University of Hong Kong, Kowloon, Hong Kong, China.
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