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  1. Article ; Online: Electrochemical Assembly Strategies of Polymer and Hybrid Thin Films for (Bio)sensors, Charge Storage, and Triggered Release.

    Sciortino, Flavien / Rydzek, Gaulthier / Boulmedais, Fouzia

    Langmuir : the ACS journal of surfaces and colloids

    2023  Volume 39, Issue 32, Page(s) 11149–11165

    Abstract: In the context of functional and hierarchical materials, electrode reactions coupled with one or more chemical reactions constitute the most powerful bottom-up process for the electrosynthesis of film components and their electrodeposition, enabling the ... ...

    Abstract In the context of functional and hierarchical materials, electrode reactions coupled with one or more chemical reactions constitute the most powerful bottom-up process for the electrosynthesis of film components and their electrodeposition, enabling the localized functionalization of conductive surfaces using an electrical stimulus. In analogy with developmental biological processes, our group introduced the concept of morphogen-driven film buildup. In this approach, the gradient of a diffusing reactive molecule or ion (called a morphogen) is controlled by an electrical stimulus to locally induce a chemical process (solubility change, hydrolysis, complexation, and covalent reaction) that induces a film assembly. One of the prominent advantages of this technique is the conformal nature of the deposits toward the electrode. This Feature Article presents the contributions made by our group and other researchers to develop strategies for the assembly of different polymer and nanoparticle/polymer hybrid films by using electrochemically generated reagents and/or catalysts. The main electrochemical-chemical approaches for conformal films are described in the case where (i) the products are noncovalent aggregates that spontaneously precipitate on the electrode (film electrodeposition) or (ii) new chemical compounds are generated, which do not necessarily spontaneously precipitate and enable the formation of covalent or noncovalent films (film electrosynthesis). The applications of those electrogenerated films will be described with a focus on charge storage/transport, (bio)sensing, and stimuli-responsive cargo delivery systems.
    Language English
    Publishing date 2023-08-05
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.3c00860
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  2. Article ; Online: Weak Polyelectrolytes as Nanoarchitectonic Design Tools for Functional Materials: A Review of Recent Achievements.

    Sanchez-Ballester, Noelia M / Sciortino, Flavien / Mir, Sajjad Husain / Rydzek, Gaulthier

    Molecules (Basel, Switzerland)

    2022  Volume 27, Issue 10

    Abstract: The ionization degree, charge density, and conformation of weak polyelectrolytes can be adjusted through adjusting the pH and ionic strength stimuli. Such polymers thus offer a range of reversible interactions, including electrostatic complexation, H- ... ...

    Abstract The ionization degree, charge density, and conformation of weak polyelectrolytes can be adjusted through adjusting the pH and ionic strength stimuli. Such polymers thus offer a range of reversible interactions, including electrostatic complexation, H-bonding, and hydrophobic interactions, which position weak polyelectrolytes as key nano-units for the design of dynamic systems with precise structures, compositions, and responses to stimuli. The purpose of this review article is to discuss recent examples of nanoarchitectonic systems and applications that use weak polyelectrolytes as smart components. Surface platforms (electrodeposited films, brushes), multilayers (coatings and capsules), processed polyelectrolyte complexes (gels and membranes), and pharmaceutical vectors from both synthetic or natural-type weak polyelectrolytes are discussed. Finally, the increasing significance of block copolymers with weak polyion blocks is discussed with respect to the design of nanovectors by micellization and film/membrane nanopatterning via phase separation.
    MeSH term(s) Electrolytes/chemistry ; Hydrogen-Ion Concentration ; Polyelectrolytes/chemistry ; Polymers/chemistry ; Surface Properties
    Chemical Substances Electrolytes ; Polyelectrolytes ; Polymers
    Language English
    Publishing date 2022-05-19
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules27103263
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    Zs.MO 81: Show issues

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  3. Article ; Online: Trends in the Synthesis of Polymer Nano- and Microscale Materials for Bio-Related Applications.

    Coats, John Peter / Cochereau, Rémy / Dinu, Ionel Adrian / Messmer, Daniel / Sciortino, Flavien / Palivan, Cornelia G

    Macromolecular bioscience

    2023  Volume 23, Issue 8, Page(s) e2200474

    Abstract: Polymeric nano- and microscale materials bear significant potential in manifold applications related to biomedicine. This is owed not only to the large chemical diversity of the constituent polymers, but also to the various morphologies these materials ... ...

    Abstract Polymeric nano- and microscale materials bear significant potential in manifold applications related to biomedicine. This is owed not only to the large chemical diversity of the constituent polymers, but also to the various morphologies these materials can achieve, ranging from simple particles to intricate self-assembled structures. Modern synthetic polymer chemistry permits the tuning of many physicochemical parameters affecting the behavior of polymeric nano- and microscale materials in the biological context. In this Perspective, an overview of the synthetic principles underlying the modern preparation of these materials is provided, aiming to demonstrate how advances in and ingenious implementations of polymer chemistry fuel a range of applications, both present and prospective.
    MeSH term(s) Polymers/chemistry ; Prospective Studies
    Chemical Substances Polymers
    Language English
    Publishing date 2023-03-22
    Publishing country Germany
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 2039130-4
    ISSN 1616-5195 ; 1616-5187
    ISSN (online) 1616-5195
    ISSN 1616-5187
    DOI 10.1002/mabi.202200474
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  4. Article ; Online: Recycling Waste Paper for Further Implementation: XRD, FTIR, SEM, and EDS Studies.

    Manandhar, Sarita / Shrestha, Bindra / Sciortino, Flavien / Ariga, Katsuhiko / Shrestha, Lok Kumar

    Journal of oleo science

    2022  Volume 71, Issue 4, Page(s) 619–626

    Abstract: Recycling technology contributes to sustainability and has received considerable interest in fulfilling consumable products' social demands, including papers. Recycled fibers are the primary source of the papermaking industry. Papers, valuable daily used ...

    Abstract Recycling technology contributes to sustainability and has received considerable interest in fulfilling consumable products' social demands, including papers. Recycled fibers are the primary source of the papermaking industry. Papers, valuable daily used materials, can be further recycled for further implementation. Here, we report a simple method for recycling waste papers for further use. Our method includes re-pulping, deinking, bleaching, and papermaking. The sample and the recycled papers were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). XRD data shows the presence of cellulose and filler minerals in the sample and the recycled papers. FTIR analysis confirmed the presence of hydroxyl, carbonyl, and methyl functional groups in the recycled papers suggesting that the deinking and bleaching did not cause any structural changes. The fibrous structures were also sustained after recycling, as confirmed by SEM studies demonstrating that the recycling was successful and the papers can be further used and recycled. EDS analysis further confirmed the filler minerals in the sample paper with a trace amount of lead, which decreased upon bleaching the paper. The structure and properties of the sample and the recycled papers were quite similar, inferring that waste papers can be recycled again and different products from low to higher grade papers can be fabricated.
    MeSH term(s) Microscopy, Electron, Scanning ; Recycling/methods ; Spectrometry, X-Ray Emission ; Spectroscopy, Fourier Transform Infrared ; X-Ray Diffraction
    Language English
    Publishing date 2022-03-14
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 2218264-0
    ISSN 1347-3352 ; 1345-8957
    ISSN (online) 1347-3352
    ISSN 1345-8957
    DOI 10.5650/jos.ess21396
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  5. Article ; Online: Surface Plasmon Tunability of Core-Shell Au@Mo

    Sciortino, Flavien / Cretu, Ovidiu / Karanikolas, Vasilios / Grasset, Fabien / Cordier, Stéphane / Ariga, Katsuhiko / Kuroda, Takashi / Kimoto, Koji

    The journal of physical chemistry letters

    2022  Volume 13, Issue 9, Page(s) 2150–2157

    Abstract: Plasmon resonances of noble metal nanoparticles are used to enhance light-matter interactions in the nanoworld. The nanoparticles' optical response depends strongly on the dielectric permittivity of the surrounding medium. We show that the plasmon ... ...

    Abstract Plasmon resonances of noble metal nanoparticles are used to enhance light-matter interactions in the nanoworld. The nanoparticles' optical response depends strongly on the dielectric permittivity of the surrounding medium. We show that the plasmon resonance energy of core-shell Au@Mo
    Language English
    Publishing date 2022-02-28
    Publishing country United States
    Document type Journal Article
    ISSN 1948-7185
    ISSN (online) 1948-7185
    DOI 10.1021/acs.jpclett.1c03853
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  6. Article ; Online: Hollow Spherical Fullerene Obtained by Kinetically Controlled Liquid-Liquid Interfacial Precipitation.

    Chen, Guoping / Sciortino, Flavien / Takeyasu, Kotaro / Nakamura, Junji / Hill, Jonathan P / Shrestha, Lok Kumar / Ariga, Katsuhiko

    Chemistry, an Asian journal

    2022  Volume 17, Issue 20, Page(s) e202200756

    Abstract: Nanomaterials with hollow structures are expected to exhibit new functionalities for materials engineering. Here we report the fabrication of fullerene ( ... ...

    Abstract Nanomaterials with hollow structures are expected to exhibit new functionalities for materials engineering. Here we report the fabrication of fullerene (C
    Language English
    Publishing date 2022-09-06
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2233006-9
    ISSN 1861-471X ; 1861-4728
    ISSN (online) 1861-471X
    ISSN 1861-4728
    DOI 10.1002/asia.202200756
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  7. Article: Photosensitizer Encryption with Aggregation Enhanced Singlet Oxygen Production

    Bloyet, Clarisse / Sciortino, Flavien / Matsushita, Yoshitaka / Karr, Paul A. / Liyanage, Anuradha / Jevasuwan, Wipakorn / Fukata, Naoki / Maji, Subrata / Hynek, Jan / D’Souza, Francis / Shrestha, Lok Kumar / Ariga, Katsuhiko / Yamazaki, Tomohiko / Shirahata, Naoto / Hill, Jonathan P. / Payne, Daniel T.

    Journal of the American Chemical Society. 2022 May 19, v. 144, no. 24

    2022  

    Abstract: Chromophores that generate singlet oxygen (¹O₂) in water are essential to developing noninvasive disease treatments using photodynamic therapy (PDT). A facile approach for formation of stable colloidal nanoparticles of ¹O₂ photosensitizers, which exhibit ...

    Abstract Chromophores that generate singlet oxygen (¹O₂) in water are essential to developing noninvasive disease treatments using photodynamic therapy (PDT). A facile approach for formation of stable colloidal nanoparticles of ¹O₂ photosensitizers, which exhibit aggregation enhanced ¹O₂ generation in water toward applications as PDT agents, is reported. Chromophore encryption within a fuchsonarene macrocyclic scaffold insulates the photosensitizer from aggregation induced deactivation pathways, enabling a higher chromophore density than typical ¹O₂ generating nanoparticles. Aggregation enhanced ¹O₂ generation in water is observed, and variation in molecular structure allows for regulation of the physical properties of the nanoparticles which ultimately affects the ¹O₂ generation. In vitro activity and the ability of the particles to pass through the cell membrane into the cytoplasm is demonstrated using confocal fluorescence microscopy with HeLa cells. Photosensitizer encryption in rigid macrocycles, such as fuchsonarenes, offers new prospects for the production of biocompatible nanoarchitectures for applications involving ¹O₂ generation.
    Keywords cell membranes ; chemical structure ; cytoplasm ; fluorescence microscopy ; oxygen production ; photochemotherapy ; photosensitizing agents ; singlet oxygen
    Language English
    Dates of publication 2022-0519
    Size p. 10830-10843.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.2c02596
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    In stock of ZB MED Bonn / Germany

    Z 4' 55/32: Show issues
    Z 7.3: Show issues

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  8. Article: Saloplastics as multiresponsive ion exchange reservoirs and catalyst supports

    Sciortino, Flavien / Mir, Sajjad Husain / Pakdel, Amir / Oruganti, Anjaneyulu / Abe, Hideki / Witecka, Agnieszka / Awang Shri, Dayangku Noorfazidah / Rydzek, Gaulthier / Ariga, Katsuhiko

    Journal of materials chemistry A. 2020 Sept. 1, v. 8, no. 34

    2020  

    Abstract: Developing saloplastics composed of Compacted Polyelectrolyte Complexes (COPECs) represents a promising strategy for assembling multifunctional and processable polymer matrices in a simple manner. Here, a comprehensive investigation of the potential ... ...

    Abstract Developing saloplastics composed of Compacted Polyelectrolyte Complexes (COPECs) represents a promising strategy for assembling multifunctional and processable polymer matrices in a simple manner. Here, a comprehensive investigation of the potential application of saloplastics as ion reactors for designing catalysts has been performed. First the propensity of saloplastics to exchange and concentrate ions has been elucidated through investigating the influence of Na⁺ to Cu²⁺ cation exchange within COPECs assembled from poly(methacrylic acid) (PMAA) and poly(allylamine hydrochloride) (PAH). The multi-scale responses of PMAA/PAH COPECs upon incubation with CuCl₂ solutions at pH 3 and 4.5 were investigated chemically by ATR-FTIR, ICP, XPS, DSC and TGA, morphologically by SEM, and mechanically by strain-to-break measurements. Both the amplitude and the kinetics of the COPEC response were driven by the deprotonation rate of PMAA chains, enabling the formation of bridge complexes with Cu²⁺ and impacting the saloplastic's composition (water content and polyelectrolytes), structure (emergence of macropores) and mechanical properties. Kinetic-based tuning of the molality of copper ions trapped in PMAA/PAH COPECs was demonstrated, enabling the usage of saloplastics as reactors. This ability allowed controlling the growth of Cu(0) nanoparticles in saloplastics by thermal annealing, ultimately adjusting their catalytic activity toward carbon monoxide (CO) oxidation. This work highlights how the ionic reservoir properties of saloplastics must be accounted for when designing the applications of COPEC-based materials.
    Keywords carbon monoxide ; catalysts ; catalytic activity ; cation exchange ; deprotonation ; macropores ; oxidation ; pH ; polymers ; water content
    Language English
    Dates of publication 2020-0901
    Size p. 17713-17724.
    Publishing place The Royal Society of Chemistry
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2702232-8
    ISSN 2050-7496 ; 2050-7488
    ISSN (online) 2050-7496
    ISSN 2050-7488
    DOI 10.1039/d0ta05901c
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  9. Article: The Ouzo effect: A tool to elaborate high-payload nanocapsules

    Goubault, Clément / Sciortino, Flavien / Mongin, Olivier / Jarry, Ulrich / Bostoën, Mégane / Jakobczyk, Hélène / Burel, Agnès / Dutertre, Stéphanie / Troadec, Marie-Bérengère / Kahn, Myrtil L / Chevance, Soizic / Gauffre, Fabienne

    Journal of controlled release. 2020 Aug. 10, v. 324

    2020  

    Abstract: We investigate the encapsulation in hybridosomes®, a type of capsules unique regarding their structure and method of elaboration. Hybridosomes® are made of a single shell of inorganic nanoparticles (~5 nm) crosslinked with a polymer and are easily ... ...

    Abstract We investigate the encapsulation in hybridosomes®, a type of capsules unique regarding their structure and method of elaboration. Hybridosomes® are made of a single shell of inorganic nanoparticles (~5 nm) crosslinked with a polymer and are easily obtained via spontaneous emulsification in a ternary mixture THF/water/butylated hydroxytoluene (BHT). Our main finding is that an exceptionally high concentration of a hydrophobic model dye can be loaded in the hybridosomes®, up to 0.35 mol.L⁻¹ or equivalently 170 g.L⁻¹ or 450,000 molecules/capsule. The detailed investigation of the encapsulation mechanism shows that the dye concentrates in the droplets during the emulsification step simultaneously with capsule formation. Then it precipitates inside the capsules during the course of solvent evaporation. In vitro fluorescence measurements show that the nano-precipitated cargo can be transferred from the core of the hybridosomes® to the membrane of liposomes. In vivo studies suggest that the dye diffuses through the body during several days. The released dye tends to accumulate in body-fat, while the inorganic nanoparticles remain trapped into the liver and the spleen macrophages.
    Keywords body fat ; butylated hydroxytoluene ; crosslinking ; droplets ; dyes ; emulsifying ; encapsulation ; evaporation ; fluorescence ; hydrophobicity ; in vivo studies ; liver ; macrophages ; models ; nanocapsules ; nanoparticles ; polymers ; solvents ; spleen
    Language English
    Dates of publication 2020-0810
    Size p. 430-439.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 632533-6
    ISSN 1873-4995 ; 0168-3659
    ISSN (online) 1873-4995
    ISSN 0168-3659
    DOI 10.1016/j.jconrel.2020.05.023
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2055: Show issues Location:
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    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
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  10. Article ; Online: Revisiting properties of edge-bridged bromide tantalum clusters in the solid-state, in solution and vice versa: an intertwined experimental and modelling approach.

    Wilmet, Maxence / Lebastard, Clément / Sciortino, Flavien / Comby-Zerbino, Clothilde / MacAleese, Luke / Chirot, Fabien / Dugourd, Philippe / Grasset, Fabien / Matsushita, Yoshitaka / Uchikoshi, Tetsuo / Ariga, Katsuhiko / Lemoine, Pierric / Renaud, Adèle / Costuas, Karine / Cordier, Stéphane

    Dalton transactions (Cambridge, England : 2003)

    2021  Volume 50, Issue 23, Page(s) 8002–8016

    Abstract: Edge-bridged halide tantalum clusters based on the { ... ...

    Abstract Edge-bridged halide tantalum clusters based on the {Ta
    Language English
    Publishing date 2021-05-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d0dt04200e
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