Article
Engineering, Chemical
Subash Reddy Kolan, Rui Wang, Torsten Hoffmann, Evangelos Tsotsas
Summary: This study investigates the formation of heteroaggregates from sub-micron particles in ProCell type spouted bed equipment. The high inlet air velocities in the special spouted bed can promote aggregate breakage and rearrangement. The mixing of sub-micron sized particles is achieved at the sub-agglomerate level, as shown by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS).
Article
Chemistry, Applied
Beatrice Russo, Emma Piacentini, Fabio Bazzarelli, Gabriele Calderoni, Paolo Vacca, Alberto Figoli, Lidietta Giorno
Summary: Ionotropic gelation (IG) is an attractive method for synthesizing water-soluble polymeric nanoparticles and sub-micron particles. The technique relies on the electrostatic interaction between ionic species of opposite charge. However, achieving size control in conventional bench-top processes is challenging. This study explores the combination of membrane dispersion technology with IG as a scalable method for producing chitosan sub-micron particles.
CARBOHYDRATE POLYMERS
(2023)
Article
Chemistry, Multidisciplinary
Fan Zhang, Renjie Ji, Xiaoyang Zhu, Hongke Li, Yating Wang, Jingpeng Wang, Fei Wang, Hongbo Lan
Summary: This study proposes a collaborative strategy based on defect induction and doping to prepare strain-regulated Pt-NiO@Ni sub-micron particles. These particles with tensile strain and Pt-doped can effectively optimize the electronic distribution of atomic structures in Pt and NiO on the surface, reducing the energy barrier of intermediates for ORR and OER. As a result, the Pt-NiO@Ni SP exhibits outstanding bifunctional catalytic activity and the Pt-NiO@Ni SP-based liquid zinc-air battery shows high open-circuit potential, excellent energy density, and favorable cyclic charge-discharge cycling durability. This work provides an innovative avenue for the rational construction of highly active bifunctional electrocatalysts for practical applications.
Article
Chemistry, Multidisciplinary
Mingming Sun, Wei Guo, Meiyu Meng, Qiuyu Zhang
Summary: Benefitting from the tunable heterogeneous interface and electronic interaction, metal-polymer-based hybrid composites have attracted attention. The synthesis methodology and structure-performance relationship need to be improved. In this study, an anisotropic eccentric Ag@polyaniline (PANI) particle was successfully fabricated by resolving the dynamics issue in the Ag+-aniline reaction system. The study demonstrates the synergy mechanism of polyvinyl pyrrolidone (PVP) and in-situ generated PANI for modifying the dynamic reaction interface and provides an inspiring concept of eccentric microstructure engineering.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Physical
Haili Sun, Wei Wei, Fengxia Liu, Xiaofei Xu, Zhiyi Li, Zhijun Liu
Summary: Sub-micron-sized LiNi0.5Mn1.5O4 (LNMO) with uniform size distribution was successfully synthesized using oleylamine-assisted solid-state method. The LNMO sample modified by oleylamine exhibited improved electrochemical performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Materials Science, Multidisciplinary
Citlali Alejandra Marin-Flores, Odin Rodriguez-Nava, Margarita Garcia-Hernandez, Rosario Ruiz-Guerrero, Fernando Juarez-Lopez, Angel de Jesus Morales-Ramirez
Summary: ZnO particles were synthesized and their free radical scavenging activity properties were evaluated in this study. The results showed that the scavenging activity increased with smaller particle size and lower ZnO dosage. A pseudo-first-order kinetics model may be present in the reaction.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Pharmacology & Pharmacy
Jakob Hubner, Jean-Baptiste Coty, Yan Busby, Denis Spitzer
Summary: Surface enhanced Raman spectroscopy (SERS) and confocal Raman microscopy were used to analyze the structure and molecular arrangement of sub-micron furosemide/PVP particles produced by spray flash evaporation. The results showed that the particles mainly consisted of PVP molecules on the surface, with primary furosemide nanocrystals agglomerated in a thin PVP matrix. This combination of techniques was effective for investigating organic sub-micron composites.
JOURNAL OF PHARMACEUTICAL ANALYSIS
(2021)
Article
Polymer Science
Keumkyung Kuk, Lukas Gregel, Vahan Abgarjan, Caspar Croonenbrock, Sebastian Haensch, Matthias Karg
Summary: This paper reports on a one-pot synthesis protocol for micron-sized silica-poly(N-isopropylacrylamide) core-shell microgels and demonstrates excellent control over the shell-to-core ratio. The experimental results show that the synthesized microgels are monodisperse and suitable for optical investigations even at high packing fractions.
Article
Materials Science, Multidisciplinary
Shuai Sun, Nana Deng, Hongbin Zhang, Lianfang He, Haiping Zhou, Baokun Han, Kuidong Gao, Xin Wang
Summary: In this study, a novel fine-grained AZ31 magnesium (Mg) alloy reinforced with sub-micron vanadium particles (V-P) was successfully prepared by powder metallurgy. The composite exhibited competitive mechanical properties with improved microhardness, yield strength, ultimate tensile strength, and elongation. The strengthening mechanisms of grain boundary strengthening, thermal mismatch, Orowan strengthening, and load transfer contributed to the improvement of strength, while the fracture mechanism included both ductile and brittle modes.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Nanoscience & Nanotechnology
Xiayi Feng, Ding Gao, Yipeng Jing, Junchao Qian, Zongqiang Cui, Juan Zhou, Xian -En Zhang, Dong Men
Summary: In this study, the intracellular pathway of micron-sized magnetic particles (M-MPs) mediated by self-assembled virus-like particles (VLPs) was investigated. The results showed that the intracellular movement of M-MPs was consistent with the virus infection pathway. This study provides experimental support for the active transport of M-MPs into other cell types, further expanding their applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Organic
Alberto Llobat, Jorge Escorihuela, Carmen Ramirez de Arellano, Santos Fustero, Mercedes Medio-Simon
Summary: This study describes the preparation of merged symmetrical tetrahydroisoquinolines with central chirality through a rhodium-catalyzed intramolecular [2 + 2 + 2] cycloaddition. The results demonstrate that linear triynes lacking a 3-atom tether can efficiently undergo cyclisation. Additional substitution at the benzene rings can be achieved by employing substituted triynes at the terminal triple bonds, leading to more complex tetrahydroisoquinolines.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Donya Ahmadkhaniha, Lucia Lattanzi, Fabio Bonora, Annalisa Fortini, Mattia Merlin, Caterina Zanella
Summary: The study aimed to assess the influence of SiC particles and heat treatment on the wear behaviour of Ni-P coatings in contact with 100Cr6 steel. It was found that the addition of SiC particles increased the friction coefficient and wear rate, and when combined with heat treatment, higher hardness was achieved.
Article
Biophysics
Eugenia Ruiz-Canovas, Rosa Mendoza, Antonio Villaverde, Jose L. Corchero
Summary: HeLa cells are able to internalize large spherical microparticles, especially when under the influence of a magnetic field. The particles, once engulfed, effectively transport chemically associated proteins into the cells, with the efficiency of internalization depending on the diameter of the particles.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Polymer Science
Xianfeng Sun, Boxin Zhou, Zhonghao Cai
Summary: This study measured the adsorption density of high molecular weight polyacrylic acid (PAA) on ultrafine particles using three different methods (total organic carbon, attenuated total reflectance fourier transform infrared spectroscopy, and elemental analyzer). The results showed that total organic carbon is not suitable for quantifying the PAA adsorption density, while the other two direct methods are appropriate. However, the difficulty of separating ultrafine particles and high molecular weight PAA using filtration and centrifugation methods limits the usage of total organic carbon. Comparatively, it is easier to collect the flocs and determine the PAA adsorption density using elemental analyzer and attenuated total reflectance fourier transform infrared spectroscopy. The strong adsorption capacity of ultrafine particles makes these two techniques suitable for quantifying the adsorption capacity of high molecular weight PAA.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Pei-Zhen Dong, Bin Qiu, Xiao-De An, Jian Xiao
Summary: A cascade dearomative [4 + 2] cycloaddition reaction has been developed for the synthesis of diverse indoline-fused polycycles with high yields and excellent diastereoselectivity. The method is easy to handle, has a broad substrate scope, and can be conducted under environmentally benign conditions.