Galleries
Created on : May 25, 2023
Polycrystalline opals by Natalie
Polycrystalline opals by Natalie
Buckled pHEMA cellular structure by DoYoon
Buckled pHEMA cellular structure by DoYoon
Created on : April 24, 2023
Created on : June 08, 2016
Created on : June 06, 2016
Created on : June 06, 2016
Created on : June 06, 2016
Created on : June 06, 2016
Created on : June 06, 2016
Dynamic, adaptive fluidic surfaces for multifunctional tunability Gallery
Created on : June 06, 2016
Created on : June 06, 2016
Created on : June 06, 2016
Created on : June 06, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : May 26, 2016
Created on : April 26, 2016
The slippery liquid surface
Fig. 1: The slippery liquid surface almost completely (up to >99%) prevents surface contamination by a wide range of pathogenic bacteria.
A SLIPS-coated surface submerged
Fig. 2: A SLIPS-coated surface submerged in an algae-rich medium shows no accumulation of biofouling.
A single surface
Fig. 3: A single surface - liquid-infused fluorogel shown here - prevents adhesion of proteins, living cells, and blood.
A slippery liquid coating
Fig. 4: A slippery liquid coating applied to the inside of medical tubes and catheters comprehensively repels blood. The devices prevent protein adhesion, clogging, loss of platelets, and surface-nucleated clotting and thrombus formation.
In addition to proteins
Fig. 5: In addition to proteins and microoganisms, SLIPS also repels insects. Ants not only slide off the slippery surface but actively turn away after failing to get a grip on it.
Photograph of CV-stained
Fig. 6: Photograph of CV-stained biofilms formed on variably infused silicone tubing in the same conditions as A-D; the lower half is infused and the top half is untreated. Only a very small amount of biofilms form on the infused section of the tube, and...
Bacteria readily form a ~40 µm
Fig. 7: Bacteria readily form a ~40 µm thick biofilm on untreated silicone tubing, but biofilms of Pseudomonas aeruginosa are not present on the surface of iPDMS tubing in the same conditions. Note that some small, easily removed bacterial aggregates are...
Created on : April 26, 2016
A scalable method
Fig. 1: A scalable method to directly coat aluminum surfaces with a nanostructured polymer layer, subsequently converted into a slippery liquid-infused porous surface (SLIPS), is demonstrated. SLIPS can effectively delay ice accumulation and facilitate...
Condensation droplets
Fig. 2: Condensation droplets slide off the slippery liquid surface soon after they form, before they have a chance to grow or freeze.
The smooth, defect-free SLIPS
Fig. 3: The smooth, defect-free SLIPS surface minimizes sites for ice to nucleate, compared to a textured superhydrophobic surface (SHS).
Free-sliding droplets
Fig. 4: Free-sliding droplets that do freeze remain isolated, rather than merging into a large ice coating.
While ice inevitably freezes
Fig. 5: While ice inevitably freezes at very low temperatures, the slippery surface minimizes ice adhesion and allows frozen droplets to slide off.
Thawing droplets
Fig. 6: Thawing droplets are not pinned to the surface and can slide off rapidly with a small temperature increase.
Created on : April 26, 2016
Bio-inspired vascularized
Fig. 1: Bio-inspired vascularized fouling-release surfaces.
Bio-inspired vacularized
Fig. 2: Bio-inspired vacularized fouling-release surfaces.
(A) Schematic of the process
Fig. 3: (A) Schematic of the process to make either infused PDMS or vascularized, infused PDMS. For simple infused PDMS (upper row), cured PDMS is placed in a bath of silicone oil which diffuses into the PDMS solid. For vascularized PDMS, the vascular...
(A) Removal of glass
Fig. 4: (A) Removal of glass, PDMS, and lubricant-infused PDMS from a solution of S. aureus after 48 hours of growth. The black arrow indicates the location of the infused PDMS sample. (B) Surfaces after staining for adherent biofilm with crystal violet....
(A) Glass slides half-coated
Fig. 5: (A) Glass slides half-coated with lubricant-infused PDMS were incubated in culture vessels containing B. braunii. After 12 days, the slides were slowly removed from the vessel using a dip coater attached to the slide. At t=0 and t=5 seconds, the...
(A) Surface coverage
Fig. 6: (A) Surface coverage of biofilm remaining on lubricant-infused PDMS versus glass control surfaces after incubation in and removal from the liquid medium containing C. reinhardtii, D. salina, or N. oculata. For all three species, there was a...
(A) Quantification of the amount of biofilm
Fig. 7: (A) Quantification of the amount of biofilm remaining on these surfaces compared to unlubricated controls (CtrlD) and samples that had undergone no lubricant evaporation (0h). The samples with embedded vasculature show significantly less adherent...
Created on : April 26, 2016
Dynamic, Adaptive Fluidic Surfaces For Multifunctional Tunability Gallery
Design, fabrication, and mechanica
Fig. 1: Design, fabrication, and mechanical response mechanism of adaptive liquid-infused materials.
Tunable droplet motion and optics
Fig. 2: Tunable droplet motion and optics. A. (Left) Stretching roughens the smooth liquid interface, stops a sliding droplet in its tracks, and pins a newly added droplet in place. Relaxing restores the smooth surface and allows both droplets to begin...
Created on : April 26, 2016
Design and optimization of SLIPS coatings.
Fig. 1: Design and optimization of SLIPS coatings.
Uniformly nanoscale texture
Fig. 2: Uniformly nanoscale texture can be created directly on a wide range of surfaces by a simple reaction that produces nanocrystalline metal oxides, such as aluminum oxy hydroxide, boehmite (AlO(OH)), with many options for varying the crystalline...
Highly regular porous
Fig. 3: Highly regular porous coatings based on an inverse colloidal monolayer can be designed to create mechanically durable, transparent, omniphobic SLIPS surfaces, and enable systematic study, tailoring, and precise chemical patterning of the interface...
Layer-by-layer (LbL)
Fig. 4: Layer-by-layer (LbL) deposition of negatively charged silica nanoparticles and positively charged polyelectrolytes creates nanoscale surface structures that are further surface-functionalized with fluorinated silanes and infiltrated with...
A variety of lubricant-infused
Fig. 5: A variety of lubricant-infused omnirepellent fabrics have been developed based on rational optimization of the fiber geometry and surface coating properties.
Fluorogels infused with fluorinated
Fig. 6: Fluorogels infused with fluorinated lubricants yield materials that combine mechanical and optical tunability with shape-memory properties and a wide range of antifouling behaviors.
Systematic variation of the lubricant
Fig. 7: Systematic variation of the lubricant properties, such as viscosity, enables fine tuning of the slippery behavior.
A covalently tethered
Fig. 8: A covalently tethered, flexible molecular layer of perfluorocarbon holds a thin liquid film of medical-grade perfluorocarbon on the surface. The surface is stable under blood flow and can be applied to the inside of medical tubing and catheters.
Lubricant is infused in a vascularized
Fig. 9: Lubricant is infused in a vascularized substrate to create an automatically self-replenishing surface.
(A) Top-down views
Fig. 10: (A) Top-down views of the flat and structured surfaces covered with the dyed fluorescent lubricant. (B) Mean red intensity of the flat (diamonds) and structured (squares) surfaces at varying flow rates. Although there is some variation, the...
