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UID:69dc1c66cabc8
DTSTAMP:20260412T182750
DTSTART:20170306T110000
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URL:https://murmitoyen.com/events/vanille/udem/detail/751678-seminaire-jaan
 a-vapaavuori-phd
LOCATION:Pavillon Roger-Gaudry \, 2900\, boul. Édouard-Montpetit\, Local M
 -415\, Montréal\, QC\, Canada
SUMMARY:Séminaire Jaana Vapaavuori\, Ph.D.
DESCRIPTION:Titre : ''Supramolecular Material Design Concepts at the Interf
 ace of Visible Light and Energy''Endroit : Pavillon Roger-Gaudry\, salle 
 G-715 à 11 h 00.
Cette conférence sera prononcée par Jaana Vapaavuo
 ri\, Ph.D. de l'Université de Montréal\, postdoctorante sous la superv
 ision de la Professeure Géraldine Bazuin et du Professeur Christian Pell
 erin.
Résumé : A key to achieving high-tech applications is to first und
 erstand the delicate balance of supramolecular interactions in soft conden
 sed materials\, and then develop methods for controlling them. Due to its 
 diverse characteristics\, light is arguably one of the most attractive too
 ls for energy production and manipulation of materials: it provides high s
 patial and temporal resolution\, can be optimized (wavelength\, intensity\
 , polarization) for different targets\, transfers significant amounts of e
 nergy without wires\, and can allow reversible on/off switching. In additi
 on to converting the energy of light into electricity via photovoltaic dev
 ices\, light energy can be converted directly into kinetic energy by takin
 g advantage of the azobenzene photoisomerization reaction in photomechanic
 al materials.
In this presentation\, three different topics of photorespon
 sive soft materials will be discussed. First\, the design principles of su
 pramolecular azobenzene-containing polymer materials and their photomechan
 ical functions are decoded. In addition to other complementary material ch
 aracterization techniques\, two different IR methods are used for elucidat
 ing what takes place\, on the molecular level\, when nanometer-scale azobe
 nzene motion is converted into micron-scale material motion. Second\, we w
 ill explore how supramolecular assembly of light-active azobenzene can be 
 used for photo-switching the nanostructures of a block copolymer in the 10
 -100 nm range. Third\, we present a new preparation method for dye-sensiti
 zed solar cells\, based on nanostructured cellulose aerogels\, which elimi
 nates one common pathway of electrolyte leakage and allows easy scale-up o
 f the devices.

Affiche de la conférence
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TZID:America/Montreal
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