Françoise M. Winnik
University of Helsinki
MicelleAnalytical chemistryBiophysicsDynamic light scatteringPolyelectrolyteNanoparticleCopolymerNanotechnologyOrganic chemistryAqueous solutionChemistryPolymer chemistryMaterials sciencePoly(N-isopropylacrylamide)PyreneChitosanChemical engineeringPolymerAmphiphileFluorescence
258Publications
72H-index
17.1kCitations
Publications 242
Newest
#1Koji Okuno (Osaka University)
#2Takuya Arisawa (Osaka University)
Last. Françoise M. Winnik (UH: University of Helsinki)H-Index: 72
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Thermoresponsive water-soluble polymers, aqueous solutions of which undergo lower critical solution temperature (LCST)-type phase separation, have been investigated in detail for several decades. To develop LCST-type thermoresponsive polymers with new polymer backbone, 4-azido-5-hexynamide (AHA) derivatives were designed as monomers for copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) polymerization. AHA derivatives carrying secondary amide side chains, that is, 4-azido-N-methyl-5-hexynami...
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#1Nobuyuki Morimoto (Tohoku University)H-Index: 24
#2Florence Segui (UdeM: Université de Montréal)H-Index: 2
Last. Françoise M. Winnik (National Institute for Materials Science)H-Index: 72
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Thermoresponsive self-assembled nanogels were conveniently prepared by cholesterol end-capped poly(N-isopropylacrylamide) (PNIPAM) in water. Both cholesterol end-capped PNIPAMs (telelchelic cholesterol PNIPAM, tCH-PNIPAM) formed flower-like nanogels by the self-assembling of four to five polymer chains with multiple domains of cholesterol in water at 20 °C. Meanwhile, one end-group cholesterol-capped PNIPAM (semitelechelic cholesterol PNIPAM, stCH-PNIPAM) was also formed as a nanogel by the self...
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#1Jukka Niskanen (UdeM: Université de Montréal)H-Index: 9
#2Alexander J. Peltekoff (U of O: University of Ottawa)H-Index: 5
Last. Françoise M. Winnik (National Institute for Materials Science)H-Index: 72
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#1Jean-Richard Bullet (UdeM: Université de Montréal)H-Index: 2
#2Evgeniya Korchagina (UdeM: Université de Montréal)H-Index: 6
Last. Françoise M. Winnik (UH: University of Helsinki)H-Index: 72
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Last. Françoise M. WinnikH-Index: 72
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#1Issei Otsuka (UdeM: Université de Montréal)H-Index: 26
#2Xuewei Zhang (UdeM: Université de Montréal)H-Index: 1
Last. Françoise M. Winnik (UdeM: Université de Montréal)H-Index: 72
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Aqueous dispersions of nanogels that respond to switches in environmental pH and/or temperature by changes in their hydrodynamic radius (Rh ) and/or zeta-potential are prepared by reversible addition-fragmentation chain-transfer (RAFT) polymerization-induced thermal (70 degrees C) self-assembly (PITSA) of N-isopropylacrylamide (NIPAM) in the presence of a poly(methacrylic acid) (PMAA)-substituted macromolecular chain transfer agent and a cross-linker. Photochromic spiropyran (SP) moieties are co...
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#1Hao Ren (SNNU: Shaanxi Normal University)H-Index: 4
#2Xing-Ping Qiu (UdeM: Université de Montréal)H-Index: 18
Last. Françoise M. Winnik (UH: University of Helsinki)H-Index: 72
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Azopyridines (AzPy) act as light-sensitive groups that undergo reversible cis–trans isomerization upon UV irradiation, as hydrogen-bond acceptors, and as ionizable moieties. The kinetics of the thermal cis- to trans-AzPy deactivation are slow except when the Py nitrogen is H-bonded or cationic. The properties of AzPy were used here to control the phase transition of aqueous solutions of α-azopyridine-ω-n-dodecyl-poly(N-isopropylacrylamides) (C12-PN-AzPy) with the molar mass (Mn) ranging from 580...
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#1Fabian Pooch (UH: University of Helsinki)H-Index: 4
#2Valerij Teltevskij (UH: University of Helsinki)H-Index: 1
Last. Françoise M. Winnik (UH: University of Helsinki)H-Index: 72
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At room temperature, poly(N-isopropylacrylamide) (PNIPAM) is soluble in water and methanol, but it is not soluble in certain water/methanol mixtures. This phenomenon, known as cononsolvency, has been explored in great detail experimentally and theoretically in an attempt to understand the complex interactions occurring in the ternary PNIPAM/water/co-nonsolvent system. Yet little is known about the effects of the polymer structure on cononsolvency. To address this point, we investigated the tempe...
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#1Grégory Beaune (National Institute for Materials Science)H-Index: 13
#2Usharani Nagarajan (National Institute for Materials Science)H-Index: 4
Last. Françoise M. Winnik (UdeM: Université de Montréal)H-Index: 72
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Controlling the propagation of primary tumors is fundamental to avoiding the epithelial to mesenchymal transition process leading to the dissemination and seeding of tumor cells throughout the body. Here we demonstrate that nanoparticles (NPs) limit the propagation of cell aggregates of CT26 murine carcinoma cells used as tumor models. The spreading behavior of these aggregates incubated with NPs is studied on fibronectin-coated substrates. The cells spread with the formation of a cell monolayer...
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#2Walter RichteringH-Index: 75
Last. Zhan Chen
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