Structured Particulate Materials: Surface Wrinkling and Porosity of Polymer Particles toward Biological and Biomedical Applications (Adv. Mater. Interfaces 24/2017)

Visaveliya, Nikunjkumar; Leishman, Christopher W.; Ng, K. Y Simon; Yehya, Nicolás; Tobar, Nelson; Eisele, Dörthe M.; Köhler, J. Michael

doi:10.1002/admi.201770125

Cited by 2 publications

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“…Under the same conditions, the wrinkling wavelength increases from 0.25 to 0.80 µm as the radius of the particle is increased from 20 to 100 µm, which consequentially results in a reduction in the wettability of the surfaces. [51,62,63]…”

Section: Investigation Of the Degree Of Wrinkling And The Level Of Om...mentioning

confidence: 99%

An Omniphobic Spray Coating Created from Hierarchical Structures Prevents the Contamination of High‐Touch Surfaces with Pathogens

Jarad

Rachwalski

Bayat

et al. 2023

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Engineered surfaces that repel pathogens are of great interest due to their role in mitigating the spread of infectious diseases. A robust, universal, and scalable omniphobic spray coating with excellent repellency against water, oil, and pathogens is presented. The coating is substrate‐independent and relies on hierarchically structured polydimethylsiloxane (PDMS) microparticles, decorated with gold nanoparticles (AuNPs). Wettability studies reveal the relationship between surface texturing of micro‐ and/or nano‐hierarchical structures and the omniphobicity of the coating. Studies of pathogen transfer with bacteria and viruses reveal that an uncoated contaminated glove transfers pathogens to >50 subsequent surfaces, while a coated glove picks up 104 (over 99.99%) less pathogens upon first contact and transfers zero pathogens after the second touch. The developed coating also provides excellent stability under harsh conditions. The remarkable anti‐pathogen properties of this surface combined with its ease of implementation, substantiate its use for the prevention of surface‐mediated transmission of pathogens.

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Section: Investigation Of the Degree Of Wrinkling And The Level Of Om...mentioning

confidence: 99%

An Omniphobic Spray Coating Created from Hierarchical Structures Prevents the Contamination of High‐Touch Surfaces with Pathogens

Jarad

Rachwalski

Bayat

et al. 2023

Small

View full text Add to dashboard Cite

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“…Wrinkled surfaces in nature have inspired scientists to mimic them with artificial topological surfaces with high spatial periodicity. Such structures on the micro- and nanoscale show optical, biological, electronic, or acoustic properties due to their wave interference phenomena, exceptional hydrodynamic properties, enhanced adhesion force, low surface energy, and/or large specific surface area. , The integration of wrinkled surfaces with multiple hierarchical ( i.e ., structured on multiple scales in one unit) architectures even further improves the performance in catalytic support, electrodes, controllable superwetting modulation, − digital microfluidics, microfluidic sieves, surface enhanced Raman spectroscopy (SERS), , tracking and identification technology, , flexible electronics, − diffraction gratings, separation science, drug delivery, tissue engineering, , industrial field-like abrasives material, and environment protection materials . Therefore, study and construction of the unit of such materials/surfaces become prominent to understand the relationship between structures and functionalities.…”

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confidence: 99%

Microfluidics Assisted Fabrication of Three-Tier Hierarchical Microparticles for Constructing Bioinspired Surfaces

et al. 2019

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Construction of textured bioinspired surfaces with refined structures that exhibit superior wetting properties is of great importance for many applications ranging from self-cleaning, antibiofouling, anti-icing, oil/water separation, smart membrane, and microfluidic devices. Previously, the preparation of artificial surfaces generally relies on the combination of different approaches together, which is a lack of flexibility to control over the individual architecture unit, the surface topology, as well as the complex procedure needed. In this work, we report a method for rapid fabrication of three-tier hierarchical microunits (structures consisting of multiple levels) using a facile droplet microfluidics approach. These units include the first-tier microspheres consisting of the second-tier close-packed polystyrene (PS) nanoparticles decorated with the third-tier elegant polymer nanowrinkles. These nanowrinkles on the PS nanoparticles are formed according to the interfacial instability induced by gradient photopolymerization of N-isopropylacrylamide (NIPAM) monomers. The formation process and topologies of nanowrinkles can be regulated by the photopolymerization process and the fraction of carboxylic groups on the PS nanoparticle surface. Such a hierarchical microsphere mimics individual units of bioinspired surfaces. Therefore, the surfaces from self-assembly of these fabricated two-tier and three-tier hierarchical microunits collectively exhibit "gecko" and "rose petal" wetting states, with the micro-and nanoscale structures amplifying the initial hydrophobicity but still being highly adhesive to water. This approach offers promising advantages of high-yield fabrication, precise control over the size and component of the microspheres, and integration of microfluidic droplet generation, colloidal nanoparticle self-assembly, and interfacial polymerization-induced nanowrinkles in a straightforward manner.

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Structured Particulate Materials: Surface Wrinkling and Porosity of Polymer Particles toward Biological and Biomedical Applications (Adv. Mater. Interfaces 24/2017)

Cited by 2 publications

References 0 publications

An Omniphobic Spray Coating Created from Hierarchical Structures Prevents the Contamination of High‐Touch Surfaces with Pathogens

An Omniphobic Spray Coating Created from Hierarchical Structures Prevents the Contamination of High‐Touch Surfaces with Pathogens

Microfluidics Assisted Fabrication of Three-Tier Hierarchical Microparticles for Constructing Bioinspired Surfaces

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