Moldable Superhydrophobic Surfaces

Costa, Ana M. S.; Dencheva, Nadya Vasileva; Caridade, Sofia G.; Denchev, Z.; Mano, João F.

doi:10.1002/admi.201600074

Cited by 6 publications

(5 citation statements)

References 32 publications

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“…Hydrophobic particles can be loosely fixed over flat surfaces to prepare moldable superhydrophobic surfaces . For the case of LM, it was reported that the encapsulating layer of particles can present a structure from a loosely packed monolayer to a multilayer structure.…”

Section: Liquid Marblesmentioning

confidence: 99%

The Potential of Liquid Marbles for Biomedical Applications: A Critical Review

Oliveira

Reis

Mano

2017

Adv Healthcare Materials

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Liquid marbles (LM) are freestanding droplets covered by micro/nanoparticles with hydrophobic/hydrophilic properties, which can be manipulated as a soft solid. The phenomenon that generates these soft structures is regarded as a different method to generate a superhydrophobic behavior in the liquid/solid interface without modifying the surface. Several applications for the LM have been reported in very different fields, however the developments for biomedical applications are very recent. At first, the LM properties are reviewed, namely shell structure, LM shape, evaporation, floatability and robustness. The different strategies for LM manipulation are also described, which make use of magnetic, electrostatic and gravitational forces, ultraviolet and infrared radiation, and approaches that induce LM self-propulsion. Then, very distinctive applications for LM in the biomedical field are presented, namely for diagnostic assays, cell culture, drug screening and cryopreservation of mammalian cells. Finally, a critical outlook about the unexplored potential of LM for biomedical applications is presented, suggesting possible advances on this emergent scientific area.

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Section: Liquid Marblesmentioning

confidence: 99%

The Potential of Liquid Marbles for Biomedical Applications: A Critical Review

Oliveira

Reis

Mano

2017

Adv Healthcare Materials

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“…In fact, to date a number of approaches have been followed to fabricate compartmentalized hydrogel beads including, double-emulsion strategies, electrospray, and superhydrophobic surfaces. [27][28][29][30][31][32][33] The later comprises the deposition of a polymeric solution on the superhydrophobic surface forming a spherically shaped droplet, while avoiding the use of deleterious solvents. Besides being an organic solvent/oil-free strategy, superhydrophobic surfaces are cost-effective, easily handleable, and enable one to produce polymeric beads of different sizes and with spherical-like morphologies, dependent on the droplet volume and polymer concentration.…”

Section: Resultsmentioning

confidence: 99%

Programmable Living Units for Emulating Pancreatic Tumor‐Stroma Interplay

Monteiro

Rocha

Gaspar

et al. 2022

Adv Healthcare Materials

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Bioengineering close-to-native in vitro models that emulate tumors bioarchitecture and microenvironment is highly appreciable for improving disease modeling toolboxes. Herein, pancreatic cancer living units-so termed cancer-on-a-bead models-are generated. Such user-programmable in vitro platforms exhibit biomimetic multicompartmentalization and tunable integration of cancer associated stromal elements. These stratified units can be rapidly assembled in-air, exhibit reproducible morphological features, tunable size, and recapitulate spatially resolved tumor-stroma extracellular matrix (ECM) niches. Compartmentalization of pancreatic cancer and stromal cells in well-defined ECM microenvironments stimulates the secretion of key biomolecular effectors including transforming growth factor 𝜷 and Interleukin 1-𝜷, closely emulating the signatures of human pancreatic tumors. Cancer-on-a-bead models also display increased drug resistance to chemotherapeutics when compared to their reductionistic counterparts, reinforcing the importance to differentially model ECM components inclusion and their spatial stratification as observed in vivo. Beyond providing a universal technology that enables spatial modularity in tumor-stroma elements bioengineering, a scalable, in-air fabrication of ECM-tunable 3D platforms that can be leveraged for recapitulating differential matrix composition occurring in other human neoplasias is provided here.

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“…Functional micro/nano-objects that are intrinsically rich of hydroxyl groups or can be easily treated to possess hydroxyl groups will be able to serve as the embedding materials for the fabrication of superhydrophobic surfaces while maintaining their own functionalities, such as magnetic ferroferric oxide particles. 44 …”

Section: Discussionmentioning

confidence: 99%

A highly stretchable and robust non-fluorinated superhydrophobic surface

Yao

Hou

et al. 2017

J. Mater. Chem. A

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Superhydrophobic surface simultaneously possessing exceptional stretchability, robustness, and non-fluorination is highly desirable in applications ranging from wearable devices to artificial skins. While conventional superhydrophobic surfaces typically feature stretchability, robustness, or non-fluorination individually, co-existence of all these features still remains a great challenge. Here we report a multi-performance superhydrophobic surface achieved through incorporating hydrophilic micro-sized particles with pre-stretched silicone elastomer. The commercial silicone elastomer (Ecoflex) endowed the resulting surface with high stretchability; the densely packed micro-sized particles in multi-layers contributed to the preservation of the large surface roughness even under large strains; and the physical encapsulation of the microparticles by silicone elastomer due to the capillary dragging effect and the chemical interaction between the hydrophilic silica and the elastomer gave rise to the robust and non-fluorinated superhydrophobicity. It was demonstrated that the as-prepared fluorine-free surface could preserve the superhydrophobicity under repeated stretching-relaxing cycles. Most importantly, the surface’s superhydrophobicity can be well maintained after severe rubbing process, indicating wear-resistance. Our novel superhydrophobic surface integrating multiple key properties, i.e. stretchability, robustness, and non-fluorination, is expected to provide unique advantages for a wide range of applications in biomedicine, energy, and electronics.

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Moldable Superhydrophobic Surfaces

Cited by 6 publications

References 32 publications

The Potential of Liquid Marbles for Biomedical Applications: A Critical Review

The Potential of Liquid Marbles for Biomedical Applications: A Critical Review

Programmable Living Units for Emulating Pancreatic Tumor‐Stroma Interplay

A highly stretchable and robust non-fluorinated superhydrophobic surface

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