Article
Materials Science, Multidisciplinary
Sylwia Fiejdasz, Adriana Gilarska, Wojciech Horak, Agnieszka Radziszewska, Tomasz Straczek, Michal Szuwarzynski, Maria Nowakowska, Czeslaw Kapusta
Summary: Novel hybrid magnetic materials based on natural polymer matrices containing superparamagnetic iron oxide nanoparticles were successfully prepared by coating SPIONs with a chitosan derivative and linking them with a chitosan-collagen hydrogel matrix through covalent bonds. The microstructure and magnetic properties of the materials were determined by electron microscopy, scanning transmission electron microscopy, and magnetic force microscopy. Rheological studies revealed the effect of material composition on mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Multidisciplinary
Prathamesh D. Raiter, Yuval Vidavsky, Meredith N. Silberstein
Summary: The mechanical properties of polyelectrolytes can be modulated by electric fields, but the sensitivity to charge distribution is key, charges must be tightly attached to the polymer backbone, and responsivity is greater if a single backbone contains both positive and negative charges. The dominant mechanisms are reorientation and stretching of the polymer chains, which also elongate the ionic clusters to maintain strong electrostatic interactions throughout deformation.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Kang Xia, Kazuya Yamaguchi, Kosuke Suzuki
Summary: This article provides an overview of recent advances in hybrid materials composed of polyoxometalates (POMs) and metal nanoparticles. The properties and applications of these materials in various fields such as electrochemistry, photochemistry, and catalysis are discussed. The combination of these two classic inorganic materials enables cooperative and synergistic behavior, presenting new possibilities for future development in this field.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Andrew Clark, Yajnaseni Biswas, Morgan E. Taylor, Ayse Asatekin, Matthew J. Panzer, Christoph Schick, Peggy Cebe
Summary: The glass-forming ability of a series of specially synthesized polyzwitterions was studied, showing that they have low dynamic fragility and can be classified as moderate to relatively strong polymeric glass formers. Polyzwitterions have high glass transition temperatures combined with low fragilities.
Article
Polymer Science
Changhang Huang, Rudolf Podgornik, Xingkun Man
Summary: Selective adsorption of flexible polymers in a cylindrical pore, studied using self-consistent field theory (SCFT), shows different behaviors depending on the sequence of sticker monomers along the chain. The correlation between stickers and nonadsorbing monomers plays a crucial role in determining the adsorption efficiency of polymers.
Article
Materials Science, Multidisciplinary
Natarajan Prabakaran, Paulpandian Muthu Mareeswaran, Poovan Shanmugavelan
Summary: This study successfully enhances the dispersion ability of curcumin in water by incorporating it into the silica shell formed on the surface of iron oxide. The interaction with DNA is investigated to explore its potential applications in living organisms.
Review
Polymer Science
Nam-Kyung Lee, Min-Kyung Chae, Youngkyun Jung, Albert Johner, Jean-Francois Joanny
Summary: This article reviews the important research in the field of polyelectrolytes, with a special focus on the role of charge sequences and the formation and transformation of pearl necklace structures.
Article
Chemistry, Multidisciplinary
Luran Zhang, Xinchen Du, Hongjie Lu, Dandan Gao, Huan Liu, Qilong Lin, Yongze Cao, Jiyang Xie, Wanbiao Hu
Summary: FePt and FePtCu nanoparticles with good dispersion were successfully fabricated using a simple, green, one-step solid-phase reduction method, with the addition of 5% Cu significantly improving the properties of FePt nanoparticles. The highest performance FePtCu nanoparticles were obtained when annealed at 750 degrees Celsius.
Article
Chemistry, Multidisciplinary
Chi Zhang, Yao Wang, Yun Chen, Yatao Wang, Peng Wang, Qiong Wu
Summary: This paper investigates the synthesis of nanocomposites made of two kinds of magnetic nanoparticles using a special Co nanomatrix. The results show that embedding Fe3O4 nanoparticles into the branches of C-O clusters allows for close contact between the two types of particles and ensures optimal electromagnetic and magnetic properties.
Article
Chemistry, Multidisciplinary
Alexander Omelyanchik, Gaspare Varvaro, Pierfrancesco Maltoni, Valeria Rodionova, Jean-Pierre Miranda Murillo, Federico Locardi, Maurizio Ferretti, Claudio Sangregorio, Fabio Canepa, Petr Chernavsky, Nikolai Perov, Davide Peddis
Summary: Metallic nanoparticles with high magnetization values were synthesized using a sol-gel autocombustion method and then reduced using hydrogen to obtain high-moment FeCo metal nanoparticles. The FeCo nanoparticles exhibited larger crystallite sizes and magnetization than expected, possibly due to the incorporation of residual carbon atoms from the oxide particles in the body-centered cubic FeCo structure. Furthermore, the effect of an external magnetic field on the reduction process was investigated.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Bingfang Zou, Shiyun Lou, Jie Duan, Shaomin Zhou, Yongqiang Wang
Summary: Magnetic-based microfluidic SERS biosensors have great potential in biological analyses due to their easy manipulation, miniaturization, and ultrasensitivity. However, collecting reliable SERS nanoprobe signals for quantitative analysis is challenging due to the irregular aggregation of magnetic carriers. In this study, magnetic/plasmonic hybrid nanostirrers embedded with a Raman reporter are developed to improve the reliability of microfluidic SERS biosensors. Experimental results showed that SERS signals from the magnetic hybrid nanostirrers could serve as microenvironment beacons, and a signal filtering method was proposed to eliminate the influence of irregular aggregation on the SERS nanoprobe.
Article
Chemistry, Multidisciplinary
Aziz Awaad, Hiroyasu Takemoto, Muneaki Iizuka, Koichi Ogi, Yuki Mochida, Abdul-Hackam Ranneh, Masahiro Toyoda, Makoto Matsui, Takahiro Nomoto, Yuto Honda, Kotaro Hayashi, Keishiro Tomoda, Tomoyuki Ohtake, Yutaka Miura, Nobuhiro Nishiyama
Summary: This study demonstrates the use of a shell material based on ethylenediamine-based carboxybetaine to enhance tumor-targeted delivery of nanoparticles, achieving remarkable success by maximizing the EPR effect.
JOURNAL OF CONTROLLED RELEASE
(2022)
Article
Chemistry, Physical
Mayifei Rong, Xiaoguang Xu, Kai Wang, Liying Lu, Yihua Bai, Yuping Tian, Zhaopeng Hou, Ruitao Zhao, Yingli Ma, Yong Jiang
Summary: A novel hollow porous microsphere composed of hydroxyapatite (HAp) with uniformly embedded Fe3O4 nanoparticles was developed. The microsphere had a specific surface area of 98.6 m2/g and an average pore size of 11.4 nm. It demonstrated high-efficiency absorption of copper ions. Due to the superparamagnetic property of Fe3O4 nanoparticles, the microspheres could be easily dispersed in water and separated by magnetic force. Therefore, the HAp-Fe3O4 hollow microsphere showed great potential in copper ion treatment.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Polymer Science
Jukka Niskanen, Alexander J. Peltekoff, Jean-Richard, Benoit H. Lessard, Francoise M. Winnik
Summary: The complexation enthalpies of polyzwitterions with polycations increase with salt concentration and molecular weight up to 0.25 M NaCl, with low degree of branching having minimal impact and highly branched structures unable to form complexes. The obtained complexes have nonstoichiometric composition and high enthalpies due to additional water being released by cascading complexation. Understanding this behavior may provide alternatives to traditional polyanion-polycation complexes.
Article
Materials Science, Multidisciplinary
S. V. Stolyar, V. V. Krasitskaya, L. A. Frank, R. N. Yaroslavtsev, L. A. Chekanova, Y. V. Gerasimova, M. N. Volochaev, M. Sh. Bairmani, D. A. Velikanov
Summary: Magnetite nanoparticles coated with polysaccharides were synthesized in this study, and the potential immobilization of biospecific molecules on the surface of these composites was investigated. The experiments demonstrated a high density of immobilized molecules through covalent immobilization on magnetic nanoparticles coated with polysaccharides, indicating their potential use in bioanalytical systems or as affinity sorbents.