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SUMMARY:Cellulose Photonics: from nature to applications - Dr Silvia Vigno
 lini\, Department of Chemistry
DTSTART:20160212T180000Z
DTEND:20160212T191500Z
UID:TALK63187@talks.cam.ac.uk
CONTACT:Dr. Hernandez-Ainsa
DESCRIPTION:Nature’s most vivid colours are produced when light repeated
 ly\nscatters against periodically organized interfaces within\nnanostructu
 red materials. This brilliant iridescent colouration is\nfrequently used i
 n many insect and animals but also in different\nspecies of plants. One of
  the most striking examples is the colour of Pollia fruits [1]\, which is 
 the results of chiral multi-layered cell wall that are responsible of prod
 ucing an intense colour-selective reflection. Biomimimiking cellulose-base
 d architectures found in plants enables us\nto fabricate novel photonic st
 ructures using low cost materials in\nambient conditions [2-4]. Importantl
 y\, it also allows us to understand\nthe biological processes at work duri
 ng the growth of these structures\nin living systems. In this talk the rou
 te for the fabrication of\ncellulose-base architecture will be presented a
 nd the optical\nproperties of cellulose artificial structures will be anal
 ysed and\ncompared with natural ones.\n\n[1] S.Vignolini et. al Pointillis
 t structural color in Pollia fruit\nPNAS 109\, 15712 (2012).\n\n[2] S. N. 
 Fernandes et. al Structural Color and Iridescence in\nTransparent Sheared 
 Cellulosic Films Macromol. Chem.  Physic. 214\,\n25-32 (2013)\n\n[3] A. G.
  Dumanli et. al Digital Color in Cellulose Nanocrystal Films\,\nACS Appl. 
 Mater. Interfaces  ACS Appl. Mater. Interfaces  6 (15)\, pp\n12302 (2014)\
 n\n[4] A. G. Dumanli et. al Controlled bio-inspired self-assembly of\ncell
 ulose-based chiral reflectors\, Adv. Opt. Mat. 2\, 646 (2014)
LOCATION:Wolfson College\, Old Combination Room
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