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SUMMARY:Nanoparticle Self-Assembly at Liquid Interfaces: unravelling the b
 asics and fabricating novel functional materials  
DTSTART:20120113T143000
DTSTAMP:20260503T013927Z
UID:a656fea0f9747362c28f091e4d0520160085141f271aa495925fa7ce
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Lucio Isa\, ETH Zurich\, Laboratory for Surface Science an
 d Technology\nSelf-assembly of colloidal particles at liquid-liquid interf
 aces (SALI) is a process with huge potential for the fabrication of contro
 lled "two-dimensional" structures and patterns. This is due to three key f
 actors: a) the particles are trapped at the interface\, but b) retain late
 ral mobility and c) exhibit specific interactions which can be tailored to
  fabricate complex assemblies. A crucial step to control SALI is to charac
 terize the wetting properties of individual nanoparticles. I will therefor
 e initially present a novel technique\, based on freeze-fracture\, shadow-
 casting (FreSCa) cryo-SEM that I have developed to measure the contact ang
 le of individual nanoparticles as small as 10nm [1]. I will later focus on
  two specific examples of material fabrication pathways. I will first disc
 uss the adsorption of core-shell iron oxide – poly(ethylene glycol) nano
 particles at water/oil interfaces as a route to fabricate composite\, smar
 t membranes [2]. Then I will demonstrate the use of SALI for the depositio
 n of non-close packed crystalline arrays of nanoparticles for lithography 
 masks [3]. The deposited patterns are then used as a mask for the fabricat
 ion of substrates for biosensing and quantum electronics. I will conclude 
 presenting future directions and developments.
LOCATION:MXG 035
STATUS:CONFIRMED
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