Browsing Faculté des arts et des sciences – Département de chimie – Travaux et publications by Title
Now showing items 4-23 of 57
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Biological impacts of Ce nanoparticles with different surface coatings as revealed by RNA-Seq in Chlamydomonas reinhardtii
(Elsevier, 2020-05-18)In order to better understand the risks of engineered nanoparticles (ENPs), it is necessary to determine their fate and biological effects under realistic exposure scenarios (e.g. low ENP concentrations). RNA-Seq was deployed to characterize the ... -
Bridging the gap between the mesoscopic 2D order–order transition and molecular-level reorganization in dot-patterned block copolymer monolayers
(American Chemical Society, 2016-11-21)Langmuir–Blodgett (LB) films of amphiphilic block copolymers (BCs) form well-defined nanostructures with long-range order useful, for instance, for nanolithography applications. Nanostructures with a 2D circular micelle (“dot”) morphology are known to ... -
Chimie des matériaux
(CRDP Midi-Pyrénées, 1997) -
Colossal C130 fullertubes : soluble [5,5] C130-D5h(1) pristine molecules with 70 nanotube carbons and two 30-atom hemifullerene end-caps
(American Chemical Society, 2023-10-27)We report the seminal experimental isolation and DFT characterization of pristine [5,5] C130-D5h(1) fullertubes. This achievement represents the largest soluble carbon molecule obtained in its pristine form. The [5,5] C130 species is the highest aspect ... -
Covalently crosslinked mussel byssus protein-based materials with tunable properties
(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 ... -
Detection and characterization of ZnO nanoparticles in surface and waste waters using single particle ICPMS
(American Chemical Society, 2015-04-29)The increasing production of ZnO nanoparticles (nZnO) makes their analysis and characterization extremely important from an ecological risk perspective, especially at the low concentrations at which they are expected to be found in natural waters. ... -
Development of an LC-MS-based method to study the fate of nanoencapsulated pesticides in soils and strawberry plant
(Elsevier, 2021-12-04)The increased production and use of nanopesticides will increase the likelihood of their exposure to humans and the environment. In order to properly evaluate their risk, it will be necessary to rigorously quantify their concentrations in major ... -
Distinguishing the effects of Ce nanoparticles from their dissolution products : identification of transcriptomic biomarkers that are specific for ionic Ce in Chlamydomonas reinhardtii
(Oxford University Press, 2020-12-11)Cerium (Ce) is a rare earth element that is incorporated in numerous consumer products, either in its cationic form or as engineered nanoparticles (ENPs). Given the propensity of small oxide particles to dissolve, it is unclear whether biological ... -
Effect of hydrogen-bond strength on photoresponsive properties of polymer-azobenzene complexes
(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 ... -
Electronic absorption spectroscopy
(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
(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 ... -
Electrospun materials with high reflectance and polarization contrast for sensing applications in the mid-infrared atmospheric window
(American Chemical Society, 2024-06-06)Several applications in remote sensing and thermal management require materials with high reflectivity and polarization contrast in the mid-infrared (MIR) spectral range. However, the existing options often fall short in terms of mechanical properties ... -
Engineered robust hydrophobic/hydrophilic nanofibrous scaffolds with drug-eluting, antioxidant, and antimicrobial capacity
(American Chemical Society, 2024-05-22)Multifunctional nanofibrous architectures have attracted extensive attention for biomedical applications due to their adjustable and versatile properties. Electrospun fabrics stand out as key building blocks for these structures, yet improving their ... -
Eumelanin : from molecular state to film
(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 ... -
Eumelanin for nature-inspired UV-absorption enhancement of plastics
(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 ... -
Field evaluation of the potential effects of polymer and silica-based nanopesticides on strawberries and agricultural soils
(Royal Society of Chemistry, 2022-08-18)Polymeric and SiO2 nanoparticles can be used as nanocarriers to improve the efficacy of pesticide delivery in agriculture. However, the environmental fate and potential risks of this type of nanopesticides in agroecosystems remain poorly understood. ... -
Glass engineering of aminotriazine-based materials with sub-ambient Tg and high kinetic stability
(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 ... -
Glass versus crystal : a balancing act between competing intermolecular interactions
(American Chemical Society, 2017-04-14)Hydrogen (H) bonds can be used either for crystal engineering or for designing compounds capable of forming very stable glassy phases. Herein, a second type of directional noncovalent interaction, π–π stacking, is introduced to establish the interplay ... -
Heterogeneous electron transfer of ferrocene in acetonitrile-LiTFSI highly concentrated electrolyte
(Elsevier, 2023-11-07)Highly concentrated electrolytes (HCE) are mixtures of equivalent or near-equivalent amounts of salt and solvent displaying a liquid phase at room temperature. HCE have intensively studied for application in energy storage devices with a particular ...