Now showing items 1-20 of 34

  • Near-infrared vibrational overtone spectra of teepleite, Na2B(OH)4Cl, and its deutero analog : research report 

    Reber, Christian; McCarthy, Paul J.; Walker, Ian M. (2021-12-05)
    Single crystals of the naturally occurring mineral teepleite, Na2B(OH)4Cl, and its deuterated analog were grown and their polarized near-infrared absorption spectra recorded at 10 K. The spectra show three intense, sharp sets of O–H and O–D overtone ...
  • 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 ...
  • On the importance of noncrystalline phases in semicrystalline electrospun nanofibers 

    Soleimani, Foad; Mazaheri, Mozhdeh; Pellerin, Christian; Bagheri, Reza (American Chemical Society, 2021-11-18)
    Tailoring the properties of electrospun fibers requires a detailed understanding and control of their microstructure. We investigate the structure/property relationships in fabrics of randomly aligned fibers of polylactide, a prevalent biopolymer, ...
  • Highly active, entirely biobased antimicrobial Pickering emulsions 

    Leclercq, Loïc; Tessier, Jérémie; Nardello-Rataj, Véronique; Schmitzer, Andreea-Ruxandra (Wiley, 2021-03-18)
    We present the development of surfactant‐free, silica‐free and fully biobased oil‐in‐water antimicrobial Pickering emulsions, based on the self‐assembly of b ‐cyclodextrin and phytoantimicrobial oils (terpinen‐4‐ol or carvacrol). Undecylenic acid (UA), ...
  • Eumelanin : from molecular state to film 

    Reali, Manuel; Camus, Anthony; Beaulieu, Guillaume; De Angelis, Jordan; Pellerin, Christian; Pezzella, Alessandro; Santato, Clara (American Chemical Society, 2021-02-02)
    Eumelanin, a macromolecular biopigment, is an attractive candidate for sustainable (green) organic electronics. Establishing structure–property relationships in eumelanin films is an essential step to exploit its technological potential. We report on ...
  • Time-dependent theory of electronic spectroscopy 

    Reber, Christian; Dab, Chahinez; Landry-Hum, Julie (Elsevier, 2021)
    The time-dependent theory of electronic spectroscopy provides an intuitive approach to understand and quantitatively analyze absorption, luminescence and resonance Raman spectra beyond vertical transition energies. The approach can be combined with ...
  • Electronic absorption spectroscopy 

    Reber, Christian; Castillo-Blum, Silvia E.; Armenta-Jaime, Erika; Beaulac, Rémi (Elsevier, 2021)
    Absorption spectroscopy in the ultraviolet, visible and near-infrared (UV-VIS-NIR) wavelength ranges is one of the oldest and most often used characterization methods in coordination chemistry. This overview illustrates examples ranging from four-coordinate ...
  • Electrospinning of highly crystalline polymers for strongly oriented fibers 

    Laramée, Arnaud; Lanthier, Catherine; Pellerin, Christian (American Chemical Society, 2020-09-23)
    Electrospun nanofibers (NFs) often demonstrate an exponential increase in mechanical and other properties at reduced diameters. Molecular orientation emerges as a key parameter for the performance of amorphous and low crystallinity polymers, but ...
  • Molecular origin of the odd–even effect of macroscopic properties of n-Alkanethiolate self-assembled monolayers : bulk or interface? 

    Amara, Fadwa Ben; Dionne, Eric R.; Kassir, Sahar; Pellerin, Christian; Badia, Antonella (American Chemical Society, 2020-06-29)
    Elucidating the influence of the monolayer interface versus bulk on the macroscopic properties (e.g., surface hydrophobicity, charge transport, and electron transfer) of organic self-assembled monolayers (SAMs) chemically anchored to metal surfaces is ...
  • Glass engineering of aminotriazine-based materials with sub-ambient Tg and high kinetic stability 

    Ali Abbas, Zeinab; Iankovitch, Anna; Jokar, Mahboubeh; Maris, Thierry; Lebel, Olivier; Pellerin, Christian (Royal Society of Chemistry, 2020-06-08)
    A challenge in glass engineering is the design of molecular glasses combining a high glass kinetic stability (GS) of the amorphous phase with a low (sub‐ambient) glass transition temperature (Tg). Triazine derivatives ...
  • Effect of hydrogen-bond strength on photoresponsive properties of polymer-azobenzene complexes 

    Vapaavuori, Jaana; Koskela, Jenni E.; Wang, Xiaoxiao; Ras, Robin H.A.; Priimagi, Arri; Bazuin, Geraldine; Pellerin, Christian (NRC Research Press & Canadian Society for Chemistry, 2020-04-16)
    Supramolecular complexation between photoresponsive azobenzene chromophores and a photopassive polymer host offers synthetic and design advantages compared with conventional covalent azo-containing polymers. In this context, it is important to understand ...
  • Azobenzene molecular glasses with tuned glass transition temperatures : from optimal light‐induced motion to self‐erasable gratings 

    Diggins, Austin; Dawson, Eoin; Kamaliardakani, Mahnaz; Pellerin, Christian; Sabat, Ribal Georges; Lebel, Olivier (Royal Society of Chemistry, 2020-04-01)
    The rate of photomechanical formation of surface relief gratings (SRG) in thin films of azobenzene materials depends on their glass transition temperature (Tg), with an optimal Tg around 50–60 °C yielding the fastest SRG growth. Herein, the SRG growth ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Eumelanin for nature-inspired UV-absorption enhancement of plastics 

    Di Mauro, Eduardo; Camaggi, Matteo; Vandooren, Nils; Bayard, Caleb; De Angelis, Jordan; Pezzella, Alessandro; Baloukas, Bill; Silverwood, Richard; Ajj, Abdellah; Pellerin, Christian; Santato, Clara (Wiley, 2019-02-06)
    In the human body, the black-brown biopigment eumelanin blocks the harmful ultraviolet (UV) radiation. In the plastics industry, additives are often added to polymers to increase their UV-absorption properties. We herein report an assessment of the ...
  • 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 – ...
  • 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 ...
  • Covalently crosslinked mussel byssus protein-based materials with tunable properties 

    Byette, Frédéric; Marcotte, Isabelle; Pellerin, Christian (Wiley, 2018-03-01)
    Mussels’ anchoring threads, named byssus, are collagen-rich fibers with outstanding mechanical properties. Our previous work has shown the possibility of producing a byssus protein hydrolyzate with good film-forming ability, providing a promising new ...

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