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SUMMARY:Everything Slips: Design of Novel Omniphobic Materials
DTSTART:20130506T131500
DTSTAMP:20260427T200119Z
UID:2d4d1a580c6678f80e6390d2d37fd22eeee38f9c2602ac609e0e0c07
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Joanna Aizenberg\, Harvard University\nBio: Joanna Aizen
 berg is well-known for her important contributions in the fields of biomim
 etics\, crystal engineering\, surface chemistry\, nanofabrication\, biomin
 eralization\, biomechanics\, and biooptics.\nCreating a robust synthetic m
 aterial that repels various liquids would have broad technological implica
 tions for areas ranging from biomedical devices to fuel transport to archi
 tecture but has proven to be extremely challenging. Inspirations from natu
 ral nonwetting structures\, particularly the lotus\, surged the developmen
 t of liquid-repellent microtextured surfaces that rely on the formation of
  a stable air-liquid interface.  Despite over a decade of intense researc
 h\, these surfaces are\, however\, still plagued with problems that restri
 ct their practical applications: they show limited oleophobicity with high
  contact angle hysteresis\; fail under pressure and upon any physical dama
 ge\; cannot self-heal\, and are expensive to produce.  To address these c
 hallenges\, I will present a new strategy to create self-healing\, Slipper
 y Liquid-Infused Porous Surfaces (SLIPS) with exceptional liquid- and ice-
 repellency\, pressure stability\, and enhanced optical transparency.  The
  approach to SLIPS.inspired by Nepenthes pitcher plants.is fundamentally d
 ifferent from the lotus effect in that we use nano/microstructured substra
 tes infused with a lubricating fluid.  This surface outperforms its natur
 al counterparts and state-of-the-art synthetic surfaces in its capability 
 to resist ice and insect adhesion\; repel various simple and complex liqui
 ds (water\, hydrocarbons\, crude oil\, and blood)\; maintain low contact a
 ngle hysteresis (<2.5o)\; restore liquid-repellency after physical damage 
 rapidly (within 0.1-1 s)\; an function at high pressures (up to ~676 atm).
   We anticipate that the slippery surfaces can find important application
 s in fluid handling and transportation\, optical sensing\, medicine\, and 
 as self-cleaning and anti-fouling surfaces operating in extreme environmen
 ts.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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