A self-filtering liquid acoustic sensor for voice recognition

Nature Electronics, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 23, 2024

Language: Английский

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Comparison of Superhydrophilic, Liquid-Like, Liquid-Infused, and Superhydrophobic Surfaces in Preventing Catheter-Associated Urinary Tract Infection and Encrustation

ACS Biomaterials Science & Engineering, Journal Year: 2024, Volume and Issue: 10(2), P. 1162 - 1172

Published: Jan. 6, 2024

Over the past decade, superhydrophilic zwitterionic surfaces, slippery liquid-infused porous covalently attached liquid-like and superhydrophobic surfaces have emerged as most promising strategies to prevent biofouling on biomedical devices. Despite working through different mechanisms, they demonstrated superior efficacy in preventing adhesion of biomolecules (e.g., proteins bacteria) compared with conventional material surfaces. However, their potential combating catheter-associated urinary tract infection (CAUTI) remains uncertain. In this research, we present fabrication these four coatings for catheters conduct a comparative assessment antifouling properties stepwise approach. Notably, coating highest activity, reducing 72.3% fibrinogen deposition over 75% bacterial (Escherichia coli Staphylococcus aureus) when an uncoated polyvinyl chloride (PVC) surface. The also exhibited robust repellence against blood improved surface lubricity, decreasing dynamic coefficient friction from 0.63 0.35 PVC fact that hydrophobic showed great promise retarding crystalline biofilm formation presence Proteus mirabilis, it is worth noting long-term may be compromised by proliferation migration colonized bacteria are unable kill them or inhibit swarming. These findings underscore both limitations ultralow fouling materials catheter CAUTI.

Language: Английский

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Durable Superhydrophobic Surfaces with Self‐Generated Wenzel Sites for Efficient Fog Collection

Small, Journal Year: 2024, Volume and Issue: 20(30)

Published: Feb. 26, 2024

Abstract Harvesting freshwater from fog is one of the possible solutions to global water scarcity crisis. Surfaces with both hydrophobic and hydrophilic regions are extensively employed for this purpose. Nevertheless, longevity these surfaces still constrained by their delicate surface structures. The zones may become damaged or contaminated after repeated use, thereby compromising effectiveness in collection. preparation generally applicable durable superhydrophobic coatings self‐generated Wenzel sites reported here long‐term efficient stable prepared depositing poly(tannic acid) coating as primer layer on various substrates, self‐assembly trichlorovinylsilane into staggered silicone nanofilaments, then thiol–ene click reaction 1 H ,1 ,2 ‐perfluorodecanethiol. demonstrate remarkable static superhydrophobicity, robust impalement resistance, droplets. Therefore, collection rate (FCR) reaches 2.13 g cm −2 h −1 during 192 continuous collection, which triple that bare substrate outperforms most previous studies. Moreover, systematic experiments models have revealed key factors achieving high FCR forming condensed droplets ≈1 mm critical radius a site proportion 0.3–0.4.

Language: Английский

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Thickness of Nanoscale Poly(Dimethylsiloxane) Layers Determines the Motion of Sliding Water Drops

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(29)

Published: May 17, 2024

Layers of nanometer thick polydimethylsiloxane (PDMS) are applied as hydrophobic coatings because their environmentally friendly and chemically inert properties. In applications such heat exchangers or fog harvesting, low water drop friction on surfaces is required. While the onset motion (static friction) has been studied, knowledge dynamic needs to be improved. To minimize friction, it essential understand which processes lead energy dissipation cause friction? Here, drops PDMS brushes different thicknesses measured, covering whole available velocity regime. The brush thickness L turns out a predictor for friction. 4-5 nm shows lowest A certain minimal necessary form homogeneous reduce attractive van der Waals interaction between substrate. increase in above = 5 also attributed increasing viscoelastic capillary ridge formed at contact line. height related thickness. Fluorescence correlation spectroscopy atomic force measurements support this interpretation. Sum-frequency generation further indicates maximum order PDMS-water interface intermediate

Language: Английский

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Development of a hyperbranched oxazolidinone dynamic omniphobic liquid-like coating with high hardness and flexibility

Applied Surface Science, Journal Year: 2024, Volume and Issue: 654, P. 159351 - 159351

Published: Jan. 18, 2024

Language: Английский

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