Browsing Waterloo Research by Author "Gauthier, Mario"
Now showing items 1-15 of 15
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Antibacterial Porous Polymeric Monolith Columns with Amphiphilic and Polycationic Character on Cross-linked PMMA Substrates for Cell Lysis Applications
Aly Saad Aly, Mohamed; Nguon, Olivier; Gauthier, Mario; Yeow, John (The Royal Society of Chemistry: RSC Advances, 2013-10-09)The application of porous polymeric monolith (PPM) columns as an effective tool for bacterial cell lysi within microfluidic chips is demonstrated. By taking advantage of the large surface area and controllable pore size ... -
Application of Pyrene Fluorescence to the Characterization of Hydrophobically Modified Starch Nanoparticles
Kim, Damin; Amos, Ryan; Gauthier, Mario; Duhamel, Jean (American Chemical Society, 2018-06-25)Several aspects of pyrene fluorescence were applied to gain an insight into the nature of the microdomains in hydrophobically modified starch nanoparticles (HM-SNPs), prepared by reacting SNPs with propionic and hexanoic ... -
Arborescent Poly(L-glutamic acid)s as Standards to Study the Dense Interior of Polypeptide Mesoglobules by Pyrene Excimer Fluorescence
Hall, Timothy; Whitton, Greg; Casier, Remi; Gauthier, Mario; Duhamel, Jean (American Chemical Society, 2018-10-01)A series of arborescent poly(l-glutamic acid)s of generations 0 to 3 (PGA(GY) with Y = 0–3) were randomly labeled with 1-pyrenemethylamine to yield several Py-PGA(GY) constructs with pyrene contents ranging between 2.5 and ... -
Asymmetric soft-hard colloidal mixtures: osmotic effects, glassy states and rheology
Merola, Maria Consiglia; Parisi, Daniele; Truzzolillo, Domenico; Vlassopoulos, Dimitris; Deepak, Vishnu D.; Gauthier, Mario (American Institute of Physics, 2017-09-06)Whereas mixtures of colloids and non-adsorbing polymers have been studied in great detail in the last two decades, binary colloidal mixtures have not received much attention. Yet, fragmental evidence from asymmetric mixtures ... -
Depletion gels from dense soft colloids: Rheology and thermoreversible melting
Truzzolillo, Domenico; Vlassopoulos, Dimitris; Munam, Abdul; Gauthier, Mario (American Institute of Physics, 2014-08-01)Upon addition of small nonadsorbing linear polymers, colloidal glasses composed of large hard spheres melt and eventually revitrify into the so-called attractive glass regime. We show that, when replacing the hard spheres ... -
Glassy States in Asymmetric Mixtures of Soft and Hard Colloids
Truzzolillo, Domenico; Marzi, Daniela; Marakis, John; Capone, Barbara; Camargo, Manuel; Munam, Abdul; Moingeon, Firmin; Gauthier, Mario; Likos, Christos N.; Vlassopoulos, Dimitris (APS Physics, 2013-11-14)By employing rheological experiments, mode coupling theory, and computer simulations based on realistic coarse-grained models, we investigate the effects of small, hard colloids on the glassy states formed by large, soft ... -
Lysis of Gram-positive and Gram-negative Bacteria by Antibacterial Porous Polymeric Monolith Formed in Microfluidic Biochips for Sample Preparation
Aly Saad Aly, Mohamed; Gauthier, Mario; Yeow, John (Springer-Verlag Berlin Heidelberg: Analytical and Bioanalytical Chemistry, 2014-07-25)Bacterial cell lysis is demonstrated using polymeric microfluidic biochips operating via a hybrid mechanical shearing/contact killing mechanism. These biochips are fabricated from a cross-linked poly(methyl methacrylate) ... -
Monomolecular films of arborescent polystyrene− graft −poly(2-vinylpyridine) copolymers: Precursors to nanostructured carbon materials
Huh, Mongyoung; Gauthier, Mario; Il Yun, Seok (Elsevier, 2017-08-23)An arborescent polystyrene (PS)−graft−poly(2-vinylpyridine) (P2VP) copolymer of overall generation number G2, consisting of side chains with Mn ∼5000, served as template for the preparation of nanostructured carbon films. ... -
On-chip cell lysis by antibacterial non-leaching reusable quaternary ammonium monolithic column
Aly Saad Aly, Mohamed; Gauthier, Mario; Yeow, John (Springer US: Biomedical Microdevices, 2015-12-16)Reusable antibacterial non-leaching monolithic columns polymerized in microfluidic channels designed for on-chip cell lysis applications were obtained by the photoinitiated free radical copolymerization of diallyldimethylammonium ... -
pH-Responsive Poly(Ethylene Glycol)- block -Polylactide Micelles for Tumor-Targeted Drug Delivery
Xiao, Lin; Huang, Lixia; Moingeon, Firmin; Gauthier, Mario; Yang, Guang (American Chemical Society, 2017-08-16)A biodegradable micellar drug delivery system with a pH-responsive sheddable PEG shell was developed using an acetal-linked poly(ethylene glycol)-block-polylactide (PEG-a-PLA) copolymer and applied to the tumoral release ... -
Poly(Lactic Acid)-Based Biomaterials: Synthesis, Modification and Applications
Xiao, Lin; Wang, Bo; Yang, Guang; Gauthier, Mario (InTech, 2012-01-20)Chapter 11 entitled "Poly(Lactic Acid)-Based Biomaterials: Synthesis, Modification and Applications" from: "Biomedical Science, Engineering and Technology", book edited by Dhanjoo N. Ghista, ISBN 978-953-307-471-9, Published: ... -
Porous chitosan microspheres as microcarriers for 3D cell culture
Huang, Lixia; Xiao, Lin; Jung Poudel, Abishek; Li, Jixiang; Zhou, Ping; Gauthier, Mario; Liu, Haiqing; Wu, Zhihong; Yang, Guang (Elsevier, 2018-12-15)Highly porous chitosan microspheres (CSM) were prepared through emulsion-based thermally induced phase separation (TIPS) without using toxic crosslinkers and chemical porogenic agents other than ice. The CSM had an average ... -
Synthesis of carboxylated derivatives of poly(isobutylene-co-isoprene) by azide–alkyne “click” chemistry
Deepak, Vishnu D.; Mahmud, Ilias; Gauthier, Mario (Springer, 2018-09-28)The synthesis of carboxylated derivatives of poly(isobutylene-co-isoprene) (isobutylene–isoprene rubber, IIR) with substitution levels ranging from 1 to 4 mol% and different spacer lengths was accomplished through azide–alkyne ... -
Templated Synthesis of Magnetic Nanoparticles through the Self-Assembly of Polymers and Surfactants
Nguyen, Vo Thu An; Gauthier, Mario; Sandre, Olivier (Multidisciplinary Digital Publishing Institute, 2014-08-04)The synthesis of superparamagnetic nanoparticles (NPs) for various technological applications continues to be an interesting research topic. The successful application of superparamagnetic NPs to each specific area typically ... -
Using Pyrene Excimer Fluorescence To Probe Polymer Diffusion in Latex Films
Casier, Remi; Gauthier, Mario; Duhamel, Jean (American Chemical Society, 2017-02-28)This study introduces a simple technique that can be used to quantitatively probe interparticle polymer diffusion (IPD) between adjacent particles in a latex film using pyrene excimer fluorescence (PEF). To demonstrate the ...