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DTSTART;TZID=America/Toronto:20220512T153000
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URL:https://uwaterloo.ca/chemical-engineering/events/watching-paper-dry-pho
 tonic-materials-cellulose-nanocrystals
LOCATION:Zoom Canada
SUMMARY:Watching Paper Dry: Photonic Materials from Cellulose Nanocrystals
CLASS:PUBLIC
DESCRIPTION:Cellulose nanocrystals (CNCs) obtained from paper or cotton are
  of\ngreat interest for many applications.1 In water\, CNCs spontaneously\
 nform a chiral nematic lyotropic liquid crystalline phase\, which can be\n
 preserved in dried films. The helicoidal structural organization of\nthe C
 NCs in these films resembles the Bouligand structure of chitin\nfound in c
 rabs and other arthropods\, and leads the films to be\niridescent.2\n\n 
            In 2010\, we reported that this liquid\ncrystalline p
 hase of CNCs can be used to template mesoporous silica\nwith chiral nemati
 c order.3 Since then\, we have extended this concept\nto create diverse ph
 otonic materials\,4 including elastomers that\nchange colour when stretche
 d and pressed\,5 and recyclable shape-memory\npolymers with photonic prope
 rties.6  In this talk\, I will discuss our\nteam’s recent progress usin
 g CNCs as a template for the construction\nof new materials and our effort
 s to better control the self-assembly\nprocess by watching CNCs dry.
DTSTAMP:20260528T200530Z
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