Article
Chemistry, Physical
Pavel Malakhovsky, Ivan Reznikov, Yauhen Aniskevich, Dmitry Murausky, Mikhail Artemyev
Summary: A method for fabricating thin films for electrostatic deposition of colloidal silver nanoplates was developed in this study. The deposition rate and surface coverage of nanoplates were found to be dependent on factors such as molar concentration and surface zeta potential. A simple model and Monte Carlo simulation were used to understand the deposition kinetics based on the principle of effective exclusion radius.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Nanoscience & Nanotechnology
Florian Billing, Bernadette Walter, Simon Fink, Elsa Arefaine, Luisa Pickarski, Sandra Maier, Robin Kretz, Meike Jakobi, Nora Feuerer, Nicole Schneiderhan-Marra, Claus Burkhardt, Markus Templin, Anne Zeck, Rumen Krastev, Hanna Hartmann, Christopher Shipp
Summary: This study investigated the impact of changes in surface wettability on protein adsorption and immune response by developing polyelectrolyte multilayer (PEM) coatings with different surface properties. The results showed that a more hydrophobic coating led to a stronger inflammatory response, while a more hydrophilic coating resulted in a milder immune response. Analysis of protein adsorption patterns and cytokine production provided insights into the interplay between material properties and immune responses, which could guide the rational design of biomaterials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Nguyen Thi Thuy Chau, Eun-Seo Koh, Su-Jin Lee, Zhou Rui, Sung Yun Yang
Summary: In this study, we successfully used H-bonding and/or electrostatic force-driven polyelectrolyte multilayer coatings on magnetic colloidal particles to prevent irreversible coagulation and introduce biochemical moieties, enhancing specific cell-magnetic particle interactions. These functional coatings show great potential in bio-applications, including targeted intracellular drug delivery.
MACROMOLECULAR RESEARCH
(2021)
Article
Engineering, Chemical
Ettore Virga, Klara Zvab, Wiebe M. de Vos
Summary: This study investigates the effect of membrane surface chemistry on fouling in surface water treatment for polyelectrolyte multilayer based nanofiltration membranes. Different surface chemistries were found to affect the adsorption of various foulants, with zwitterionic phosphatidylcholine surface chemistry demonstrating excellent fouling resistance.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Multidisciplinary Sciences
Jessie L. Webber, Rashin Namivandi-Zangeneh, Slawomir Drozdek, Kazimiera A. Wilk, Cyrille Boyer, Edgar H. H. Wong, Bronwyn H. Bradshaw-Hajek, Marta Krasowska, David A. Beattie
Summary: The study embedded an antimicrobial peptide, Nisin Z, within polyelectrolyte multilayers composed of natural polysaccharides to create a multilayer with antimicrobial properties. The peptide-containing films showed excellent antimicrobial efficacy against Staphylococcus aureus and MRSA strains, unaffected by its location within the multilayer, demonstrating the potential for creating functionalized coatings in industries such as food, biomaterials, and pharmaceuticals.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Rakshith Boranna, Chandrika Thondagere Nataraj, Shivananju Bannur Nanjunda, Suman Pahal, Raviprasad Kogravalli Jagannath, Gurusiddappa R. Prashanth
Summary: Layer-by-layer self-assembled polyelectrolyte multilayer films are a simple and elegant way to create films at the nano-microscale. This technology has been widely used as a universal functionalization technique on various substrates. In this study, a blend of conventional metal enhanced fluorescence technology and polyelectrolyte multilayer film was incorporated as a dielectric spacer and functionalized film on an aluminum tape-based substrate. The resulting device showed significant fluorescence signal enhancement compared to traditional coating techniques and demonstrated potential for low-cost and high-throughput lab-on-chip diagnostic applications.
Article
Chemistry, Physical
Husnia Kindi, Matthias Menzel, Andreas Heilmann, Christian E. H. Schmelzer, Martin Herzberg, Bodo Fuhrmann, Gloria Gallego-Ferrer, Thomas Groth
Summary: The study involved the preparation of polyelectrolyte multilayers using layer-by-layer technique and examining the effects of metal ion binding on the properties and bioactivity of the multilayers. Different metal ions were found to impact the wetting, surface potential, and mechanical properties of the multilayers, with Fe3+ ions significantly promoting cell adhesion and spreading. Complex formation with Cu2+ and Fe3+ ions led to increased metabolic activity and cell differentiation towards adipocytes, showing promise as an alternative to growth factors for tissue regeneration applications.
Article
Chemistry, Physical
Krzysztof Kolman, Giovanna Poggi, Michele Baglioni, David Chelazzi, Piero Baglioni, Michael Persson, Krister Holmberg, Romain Bordes
Summary: Controlling charge density through pH can avoid flocculation during the layer-by-layer deposition of polyelectrolytes on nanoparticles.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Kai Li, Wei Wang, Zhi-Peng Yu, Hang Jin, Yun-Tong Ge, Wei-Wei Gao, Fan Xiao, Hui-Rong Huang, Ze-Heng Peng, Jing Gong
Summary: In this study, the interaction mechanism of specific PEMs fabricated by PDDA and PSS through layer-by-layer deposition was investigated, along with exploring the underwater oil-repellency of PSS-capped PEMs. Consistency was achieved between experimental and theoretical calculations at low NaCl concentrations, but underestimation of attractive force was found as NaCl concentration increased, possibly due to reduced surface charge density and the presence of brush effect. The stable underwater lipophobicity of PSS-capped PEMs against high salinity suggests potential applications in surface wetting modification and anti-fouling.
Article
Polymer Science
Nadia Asta, Michael S. Reid, Torbjorn Pettersson, Lars Wagberg
Summary: This study introduces a method to investigate molecular interactions between fibers by using precisely characterized model materials. The findings reveal a delicate balance in fiber-fiber joint formation and the potential for inducing built-in stresses in the interphase. This research lays the groundwork for creating high-performance biobased materials with tailored fiber-fiber interactions.
Article
Biophysics
McKenzie B. Riley, Evan Strandquist, Christopher S. Weitzel, Jeremy D. Driskell
Summary: Research shows that the thiolated analog of a protein has a greater affinity for gold nanoparticles (AuNPs) and is able to form a robust hard corona, maintaining structure and function, compared to the unmodified protein which denatures with prolonged exposure to AuNPs resulting in loss of enzymatic function.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Chemistry, Physical
Mohammadhasan Hedayati, Diego Krapf, Matt J. Kipper
Summary: This study investigates the protein adsorption behavior on low-fouling and ultra-low fouling surfaces, bridging short-term and long-term interactions to develop a single mathematical model. The results suggest that short-term measurements may not be sufficient for designing antifouling materials, all surfaces eventually foul when in long-term contact with protein solutions, and fouling can occur through surface-induced oligomerization of proteins. Surfaces can be designed to reduce oligomerization or the adsorption of oligomers to prevent or delay fouling.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Polymer Science
Cassia Lux, Thomas Tilger, Ramsia Geisler, Olaf Soltwedel, Regine von Klitzing
Summary: The study investigates tailored functionalization of cellulose based papers by preparing polyelectrolyte multilayers (PEMs), revealing that different polycations lead to PEMs with different surface topographies, and these PEMs exhibit high water uptake in humid environments.
Article
Chemistry, Physical
Manuella Cerbelaud, Yasmine Bennani, Claire Peyratout
Summary: This study investigates the behavior of suspensions composed of a mixture of particles with positive and negative charges, created by the adsorption of poly-electrolyte multilayers on their surface. The study shows that surface modifications allow for heteroaggregation in the absence of salt, and the addition of salt has a different effect on the suspension behavior depending on the number of adsorbed layers. This study highlights the importance of studying heteroaggregation in these systems as a simple way to analyze the screening effect.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Lester C. Geonzon, Motoyoshi Kobayashi, Takuya Sugimoto, Yasuhisa Adachi
Summary: The adsorption kinetics of polyelectrolytes on a single particle were investigated, showing that the charge density and salt concentration have an impact on the adsorption behavior. The adsorption process of cationic polyelectrolytes is controlled by attractive interactions, while the adsorption of anionic polyelectrolytes is influenced by repulsion between charged segments and the particle surfaces.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Xiaofang Jia, Kosuke Minami, Koichiro Uto, Alice Chinghsuan Chang, Jonathan P. Hill, Jun Nakanishi, Katsuhiko Ariga
ADVANCED MATERIALS
(2020)
Article
Biochemistry & Molecular Biology
Sharmy Saimon Mano, Koichiro Uto, Mitsuhiro Ebara
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2020)
Article
Chemistry, Organic
Michihisa Murata, Masahiro Togo, Daisuke Mishima, Ai Harada, Masahiro Muraoka
Article
Cell Biology
Ahmed Nabil, Mohamed M. Elshemy, Medhat Asem, Marwa Abdel-Motaal, Heba F. Gomaa, Faten Zahran, Koichiro Uto, Mitsuhiro Ebara
OXIDATIVE MEDICINE AND CELLULAR LONGEVITY
(2020)
Article
Polymer Science
Mazaya Najmina, Koichiro Uto, Mitsuhiro Ebara
Article
Polymer Science
Motoki Okamoto, Sayako Matsumoto, Ayato Sugiyama, Kei Kanie, Masakatsu Watanabe, Hailing Huang, Manahil Ali, Yuki Ito, Jiro Miura, Yujiro Hirose, Koichiro Uto, Mitsuhiro Ebara, Ryuji Kato, Aika Yamawaki-Ogata, Yuji Narita, Shigetada Kawabata, Yusuke Takahashi, Mikako Hayashi
Article
Polymer Science
Shintaro Kawano, Jenni Lie, Ryusei Ohgi, Motohiro Shizuma, Masahiro Muraoka
Summary: A multiple-stimuli-responsive copolymer was synthesized with thermo-, pH-, and molecular-recognition segments, able to change the dissolution ability of a lipophilic dye according to pH and induce assembly and phase transition under precise pH control.
Article
Chemistry, Organic
Daisuke Mishima, Haruka Nakanishi, Yui Tsuboi, Yusho Kishimoto, Yohei Yamanaka, Ai Harada, Masahiro Togo, Yuto Yamada, Masahiro Muraoka, Michihisa Murata
Summary: This study reports a domino-type multiple C-H functionalization of tetracene with molecular benzene, forming eight C-C bonds through oxidative cross-dehydrogenative coupling without the mediation of a metal catalyst or a specific substituent.
Article
Chemistry, Multidisciplinary
Kazuki Ueda, Riku Fukuzaki, Takumu Ito, Nana Toyama, Masahiro Muraoka, Toshiki Terao, Kei Manabe, Tomoyasu Hirai, Ching-Ju Wu, Shih-Ching Chuang, Shintaro Kawano, Michihisa Murata
Summary: This study designed and synthesized an organometallic nickel complex containing thieno[3,2-b]thiophene units. Composite films of the nickel complex and polyvinylidene difluoride, prepared via a simple solution process, exhibited remarkably high n-type conductivity and air stability of the thermoelectric power factor. The introduction of thieno[3,2-b]thiophene core into the backbone of the nickel complex significantly influenced the orientation within the composite films, as indicated by grazing-incidence wide-angle X-ray diffraction analysis.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Nanami Takiguchi, Shohei Yamazaki, Michihisa Murata, Shintaro Kawano, Motohiro Shizuma, Masahiro Muraoka
Summary: A new method for the synthesis of degenerate [2]rotaxanes with two different amine stations is presented in this study. The addition of trifluoroacetic acid was found to initiate molecular shuttling, as revealed by variable-temperature H-1 NMR and rotating-frame nuclear Overhauser effect correlation spectroscopy experiments. The activation barrier for the motion remained constant even with different amines in the outer station. Conversely, the addition of camphorsulfonic acid caused rotational motion, as demonstrated by synthesizing a new [2]rotaxane without an outer station and examining its molecular behavior in the presence of acid.
Article
Polymer Science
Shintaro Kawano, Kohei Nakano, Hirofumi Sato, Masahiro Muraoka, Motohiro Shizuma
Summary: This study demonstrates the synthesis of a water-soluble coumarin monomer and its supramolecular complex with gamma-cyclodextrin (gamma-CD) macrocyclic host, resulting in a hydrogel material with high strength, high viscoelastic modulus, and rapid self-healing ability. The material's viscoelasticity is enhanced through UV-induced covalent polymer networks formation within the gamma-CD cavity. Furthermore, the material shows responsiveness to visible light and thermal stimuli, making it potentially useful for printable, injectable, and adhesive materials.
Article
Chemistry, Physical
Kazuki Ueda, Yuto Yamada, Toshiki Terao, Kei Manabe, Tomoyasu Hirai, Yuta Asaumi, Syuji Fujii, Shintaro Kawano, Masahiro Muraoka, Michihisa Murata
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Article
Chemistry, Inorganic & Nuclear
Masahiro Tsukao, Yoshifumi Hashikawa, Nana Toyama, Masahiro Muraoka, Michihisa Murata, Takahiro Sasamori, Atsushi Wakamiya, Yasujiro Murata
Article
Materials Science, Multidisciplinary
Mirei Tsuge, Kanoko Takahashi, Rio Kurimoto, Ailifeire Fulati, Koichiro Uto, Akihiko Kikuchi, Mitsuhiro Ebara
Article
Materials Science, Multidisciplinary
Eri Niiyama, Kanta Tanabe, Koichiro Uto, Akihiko Kikuchi, Mitsuhiro Ebara
