Browsing Faculté des arts et des sciences – Département de chimie by Author "Pellerin, Christian"
Now showing items 21-29 of 29
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Photocontrol of supramolecular azo-containing block copolymer thin films during dip-coating : toward nanoscale patterned coatings
Vapaavuori, Jaana; Grosrenaud, Josué; Siiskonen, Antti; Pellerin, Christian; Bazuin, Geraldine (American Chemical Society, 2019-05-07)Dip-coating allows nanostructured block copolymer (BCP) thin film fabrication in a fast and facile one-step process. It can also be coupled with external controls, such as illumination. Herein, we expose several design principles that enable photocontrol ... -
Polarized raman analysis of polymer chain orientation in ultrafine individual nanofibers with variable low crystallinity
Papkov, Dimitry; Pellerin, Christian; Dzenis, Yuris A. (American Chemical Society, 2018-10-26)Recent mechanical studies of ultrafine electrospun polymer nanofibers showed they can simultaneously possess high strength and toughness attributed to high degree of chain alignment coupled with low crystallinity. Quantitative analysis of macromolecular ... -
Probing interfacial interactions and dynamics of polymers enclosed in boron nitride nanotubes
Niskanen, Jukka; Xue, Yanming; Golberg, Dmitri; Winnik, Françoise M.; Pellerin, Christian; Vapaavuori, Jaana (Wiley, 2021-11-23)Understanding interfacial interactions in polymer systems is crucial for their applicability for instance in adhesives and coatings. Enclosing polymers in a cylindrical volume provides a system for studying interactions dictated by a continuous ... -
Quantifying polymer chain orientation in strong and tough nanofibers with low crystallinity : towards next generation nanostructured superfibers
Papkov, Dimitry; Delpouve, Nicolas; Delbreilh, Laurent; Araujo, Steven; Stockdale, Taylor; Mamedov, Sergey; Maleckis, Kaspars; Zou, Yan; Andalib, Mohammad Nahid; Dargent, Eric; Vinayak, Dravid; Holt, Martin V.; Pellerin, Christian; Dzenis, Yuris A. (American Chemical Society, 2019-04-19)Advanced fibers revolutionized structural materials in the second half of the 20th century. However, all high-strength fibers developed to date are brittle. Recently, pioneering simultaneous ultrahigh strength and toughness were discovered in fine (<250 ... -
Raman spectroscopy of individual poly(ethylene oxide) electrospun fibers : effect of the collector on molecular orientation
Richard-Lacroix, Marie; Pellerin, Christian (Elsevier, 2016-09-06)Electrospun fibers are complex polymeric materials with a typical diameter of a few hundred nanometers that are often frozen in out-of-equilibrium states due to the fast solvent evaporation and high elongational forces during the process. Their ... -
Selective isotopic labeling resolves the gel-to-fluid phase transitions of the individual leaflets of a planar-supported phospholipid bilayer
Richard-Lacroix, Marie; Umuhire, Kayiganwa Natyvella; Lister, Eugénie; Pellerin, Christian; Badia, Antonella (American Chemical Society, 2019-07-05)Knowledge of the thermotropic phase behavior of solid-supported bilayer lipid assemblies is essential to mimick the molecular organization and lateral fluidity of cell membranes. The gel-to-fluid phase transitions in a homologous series of single ... -
Smart packaging in the sustainability challenge : eumelanin as a UV-absorption enhancer of polymers
Di Mauro, Eduardo; Li, Xinda; Pellerin, Christian; Cicoira, Fabio; Santato, Clara (Institute of Electrical and Electronics Engineers, 2019-09-19)The black-brown biopigment eumelanin screens the harmful ultraviolet (UV) radiation in the human skin. In industry, the absorption of plastics in the UV range is improved by the inclusion of additives. Our work reports an evaluation of the biopigment ... -
Taming macromolecules with light : lessons learned from vibrational spectroscopy
Vapaavuori, Jaana; Bazuin, Geraldine; Pellerin, Christian (Wiley, 2017-09-12)Exciting new applications, from large-area nanopatterning and templating to soft light-powered robotics, are emerging from the fundamental research on light-triggered changes in macromolecular systems upon photoisomeriza-tion of azobenzene-based molecular ... -
Triazine‐based molecular glasses frustrate the crystallization of barbiturates
Laventure, Audrey; Lauzon, Dominic; Pellerin, Christian; Lebel, Olivier (Royal Society of Chemistry, 2019-02-05)Hydrogen bonding is a key element of supramolecular chemistry and is often used in crystal engineering to direct crystal packing. In particular, systems where motifs with multiple hydrogen (H) bonds are present, such as the donor–acceptor–donor – ...