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SUMMARY:Dr Silvia Vignoli on nature’s most vivid colours and what we can
  learn from them - Dr Silvia Vignolini ( Department of Chemistry)
DTSTART:20171116T180000Z
DTEND:20171116T190000Z
UID:TALK95104@talks.cam.ac.uk
CONTACT:Tom Dawson
DESCRIPTION:Join us to welcome Dr Silvia Vignoli who will talk about her w
 ork on cellulose photonics and how we can learn from nature when it comes 
 to applications.\n\n*Cellulose Photonics: from nature to applications*\n\n
 Nature’s most vivid colours rely on the ability to produce complex and h
 ierarchical photonic structures with lattice constants on the order of the
  wavelength of visible radiation.  A recurring strategy design that is fou
 nd both in the animal and plant kingdoms for producing such effects is hel
 icoidal multilayers. In such structures\, a series of individual nano-fibe
 rs (made of natural polymers as cellulose and chitin) are arranged paralle
 l to each other in stacked planes. When the distance between such planes i
 s comparable to the wavelength of light\, a strong polarised\, colour sele
 ctive response can be obtained. These helicoidal multilayers are generally
  structured on the microscopic and  macroscopic scale\, giving rise to com
 plex hierarchical structures enriching their visual appearance.\n\nBiomime
 tic cellulose-based architectures enables us to fabricate novel photonic s
 tructures using low cost materials in ambient conditions. Importantly\, it
  also allows us to understand the biological processes at work during the 
 growth of these structures in plants. In this talk the route for the fabri
 cation of complex bio-mimetic cellulose-based photonic structures will be 
 presented and the optical properties of artificial structures will be anal
 yzed and compared with the natural ones.\n\nEnquiries and booking:\n\nAll 
 are welcome to attend this free event.\nPlease sign up using the link on t
 he Lucy Cavendish College website "here":http://www.lucy-cav.cam.ac.uk/eve
 nts/dr-silvia-vignoli-on-natures-most-vivid-colours
LOCATION:Woodlegh Seminar Room\, Strathaird\, Lucy Cavendish College\, CB3
  0BU
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