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SUMMARY:Nanoparticle Self-Assembly at Liquid Interfaces
DTSTART:20111219T110000
DTSTAMP:20260408T132625Z
UID:88931f2451b82d3eafecf871c8543fd7bfe1cfed4f0d938f1f7b3b24
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Lucio Isa\, ETH Zurich\nSelf-assembly of colloidal particl
 es at liquid-liquid interfaces (SALI) is a process with huge potential for
  the fabrication of controlled “two-dimensional” structures and patter
 ns. This is due to three key factors: a) the particles are trapped at the 
 interface\, but b) retain lateral mobility and c) exhibit specific interac
 tions which can be tailored to fabricate complex assemblies. A crucial ste
 p to control SALI is to characterize the wetting properties of individual 
 nanoparticles. I will therefore initially present a novel technique\, base
 d on freeze-fracture\, shadow-casting (FreSCa) cryo-SEM that I have develo
 ped to measure the contact angle of individual nanoparticles as small as 1
 0nm. I will later focus on two specific examples of material fabrication p
 athways. I will first discuss the adsorption of core-shell iron oxide – 
 poly(ethylene glycol) nanoparticles at water/oil interfaces as a route to 
 fabricate composite\, smart membranes. Then I will demonstrate the use of 
 SALI for the deposition of non-close packed crystalline arrays of nanopart
 icles for lithography masks. The deposited patterns are then used as a mas
 k for the fabrication of substrates for biosensing and quantum electronics
 . I will conclude presenting future directions and developments.
LOCATION:MXG 035
STATUS:CONFIRMED
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