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UID:DSC-20475
DTSTART;TZID=Europe/Berlin:20240125T130000
SEQUENCE:1707201325
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20240125T150000
URL:https://dresden-science-calendar.org/calendar/en/detail/20475
LOCATION:TUD Materials Science - HAL\, Hallwachsstraße 301069 Dresden
SUMMARY:Nikoubashman: Watching paint dry - From colloidal droplets to compl
 ex nanostructures
CLASS:PUBLIC
DESCRIPTION:Speaker: Arash Nikoubashman\nInstitute of Speaker: Leibniz-Inst
 itut für Polymerforschung Dresden e. V.\nTopics:\nMaterialien\n Location:
 \n  Name: TUD Materials Science - HAL (HAL Bürogebäude - 115)\n  Street:
  Hallwachsstraße 3\n  City: 01069 Dresden\n  Phone: \n  Fax: \nDescriptio
 n: Drying colloidal dispersions are encountered in many technologies\, inc
 luding painting\, inkjet printing\, and manufacturing polymer LED displays
 . In these applications\, colloidal nanoparticles (NPs) are typically init
 ially dispersed in a liquid solvent such as water\, which then evaporates\
 , leaving behind a dried residue of NPs. We aim at understanding the struc
 ture formation of supraparticles made from spherical\, rod-shaped NPs and 
 their mixtures. In conjunction with experiments\, we performed particle-ba
 sed simulations to better understand the ordering of the confined NPs duri
 ng drying. Simulations were performed at various evaporation rates using b
 oth implicit and explicit solvents to probe the role of hydrodynamic inter
 actions. We observed in drying droplets containing bidisperse spheres\, th
 at the smaller species accumulated in the shell of the resulting suprapart
 icles followed by a homogeneously mixed core-region of small and big NPs. 
 When examining supraparticles created from pure rod suspensions\, we obser
 ved long-range orientational order of the anisotropic NPs on the suprapart
 icle surface during slow drying compared to fast drying\, regardless of th
 e aspect ratio being investigated. For supraparticless created from a mixt
 ure of rods and spheres\, we observed the rods forming a thin shell around
  a uniformly distributed core of both rods and spheres.
DTSTAMP:20260417T174702Z
CREATED:20240120T064027Z
LAST-MODIFIED:20240206T063525Z
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