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UID:0-900@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20231121T110000
DTEND;TZID=Europe/Paris:20231121T120000
DTSTAMP:20231108T143328Z
URL:https://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lpt
 ms-cyrille-hamon-lps-orsay/
SUMMARY:Séminaire du LPTMS : Cyrille Hamon (LPS) - Salle des séminaires d
 u FAST et du LPTMS\, bâtiment Pascal n°530 - 21 Nov 23 11:00
DESCRIPTION:Colloidal design of nanoparticles and hierarchical nanostructur
 esCyrille Hamon (Laboratoire de physique des Solides)The production of sol
 id materials with nanoscale building blocks can be conveniently achieved b
 y colloidal self-assembly and with a minimal synthetic effort. This presen
 tation will revolve around elongated nanoparticles with a pentagonal base.
  In the first part\, I will show the different methods we use to self-asse
 mble and study NPs self-assembly. In the second part\, I will focus on the
  self-assembly of the pentagonal NPs into low-symmetry supercrystals where
 in the loss of symmetry can be understood through an analogy with the opti
 mal packing of regular pentagons in the plane: the individual objects have
  rotational symmetry of order 5\, but they associate in pairs which create
 s an inversion center. In doing so\, they reduce their rotational symmetry
  to order 2. Assemblies are studied by X-ray scattering and electron micro
 scopy as well as some numerical simulations reproducing the symmetry and d
 ensity of the packing. Moreover\, the Raman signal of molecules is enhance
 d in the vicinity of these assemblies\, with an exaltation that depends on
  the exposed facet of the crystal.
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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