Article
Chemistry, Multidisciplinary
Yidi Li, Yang Kong, Bingyu Xue, Jialei Dai, Gang Sha, Hang Ping, Liwen Lei, Weimin Wang, Kun Wang, Zhengyi Fu
Summary: This study successfully synthesized an amorphous intergranular phase controlled by Mg2+ and observed the enrichment of Mg2+ at grain boundaries, forming Mg-rich amorphous calcium phosphate. The amorphous intergranular phases act like glue to connect each nanorod, reinforcing the enamel-like arrays. The as-received FAP-M artificial enamel exhibits excellent mechanical properties, with hardness and Young's modulus significantly higher than those without controlled by Mg2+.
Article
Multidisciplinary Sciences
Liang Dong, Yun-Jun Xu, Cong Sui, Yang Zhao, Li-Bo Mao, Denis Gebauer, Rose Rosenberg, Jonathan Avaro, Ya-Dong Wu, Huai-Ling Gao, Zhao Pan, Hui-Qin Wen, Xu Yan, Fei Li, Yang Lu, Helmut Colfen, Shu-Hong Yu
Summary: This study successfully combines gadolinium ions with amorphous calcium carbonate to produce stable paramagnetic amorphous carbonate nanoclusters, which have high contrast and improved biocompatibility, and they provide a promising strategy for designing magnetic resonance contrast agents.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Biomaterials
Lorenzo Degli Esposti, Smilja Markovic, Nenad Ignjatovic, Silvia Panseri, Monica Montesi, Alessio Adamiano, Marco Fosca, Julietta V. Rau, Vuk Uskokovic, Michele Iafisco
Summary: The study found that the activation energy of crystallization of Cit-(F)ACP samples is lower compared to blank ACP, with hydroxyapatite (HA) or fluorapatite (FHA) as the main products after thermal treatment. The crystalline products showed good biocompatibility, retaining carbonate ions, with morphology influenced by the nominal Cit/Ca ratio and the presence of fluoride.
JOURNAL OF MATERIALS CHEMISTRY B
(2021)
Article
Multidisciplinary Sciences
Zhao Mu, Kangren Kong, Kai Jiang, Hongliang Dong, Xurong Xu, Zhaoming Liu, Ruikang Tang
Summary: By regulating structurally bound water and external pressure, we manufactured transparent inorganic monoliths with continuous structures, boasting mechanical strength comparable to single-crystal calcite.
Article
Chemistry, Multidisciplinary
A. Sivakumar, S. Sahaya Jude Dhas, J. Thirupathy, K. P. J. Reddy, Raju Suresh Kumar, Abdulrahman Almansour, Shubhadip Chakraborty, S. A. Martin Britto Dhas
Summary: Dynamic supersonic shock waves can induce phase transitions in materials. This research reveals the novel results of a switchable phase transition occurring in a nickel sulfate hexahydrate single crystal triggered by dynamic shock waves under ambient conditions.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Xinyan Li, Muhua Chen, Guangyao Li, Ping Wang
Summary: Construction of heterophase junction is an effective approach to enhance catalytic performance, but its potential in formaldehyde pollution remediation is understudied. In this study, we report the fabrication, catalytic properties, and mechanism of an alpha/A-MnO2 heterophase junction catalyst for HCHO oxidation. The catalyst exhibited exceptional performance and stability, outperforming most reported MnO2-based catalysts.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Bin Li, Ying Yu, Mingyang Xin, Jialiang Xu, Tianzhe Zhao, Huimin Kang, Guoxiang Xing, Peisheng Zhao, Tianyong Zhang, Shuang Jiang
Summary: Chiral hybrid organic-inorganic perovskites (HOIPs) with intrinsic noncentrosymmetric structures have attracted wide attention due to their fascinating properties such as ferroelectronics and second-order nonlinear optics (NLO). However, most previous research focused on chiral lead-based halide perovskites, neglecting the toxic effects of the Pb element. In this study, block-like (R-/S-NEA)(2)CuCl4 and needle-like (R-/S-CYHEA)(6)Cu3Cl12 single crystals were successfully synthesized, exhibiting mirror circular dichroism (CD) signals. The thin films of these crystals showed efficient second harmonic generation (SHG) responses, with the NLO coefficients of (R-NEA)(2)CuCl4 and (R-CYHEA)(6)Cu3Cl12 being 11.74 and 3.04 pm V-1, respectively. These findings provide insights for designing and tuning the SHG response in chiral HOIPs.
Article
Materials Science, Multidisciplinary
A. O. Zamchiy, E. A. Baranov, S. Starinskiy, N. A. Lunev, I. E. Merkulova
Summary: In this study, polycrystalline silicon thin films were synthesized for the first time using Au-induced crystallization of silicon suboxide. The structure and elemental composition of the stacked structure were analyzed using TEM, Raman, and EDX, revealing the formation of poly-Si thin film and a barrier SiO2 layer. The proposed mechanism for the growth of poly-Si thin films involves features such as dewetting of Au films and formation of a SiO2 barrier layer, different from the traditional layer exchange process.
Article
Chemistry, Multidisciplinary
A. Sivakumar, S. Sahaya Jude Dhas, T. Pazhanivel, Abdulrahman Almansour, Raju Suresh Kumar, Natarajan Arumugam, C. Justin Raj, S. A. Martin Britto Dhas
Summary: The study highlights the importance of phase-transition behavior under shock-wave-loaded conditions for multiwall carbon nanotubes, with experimental analysis revealing the formation of crystalline CNTs under shock pulse-loaded conditions, providing significant improvement in electrochemical properties and potential applications in energy storage.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Multidisciplinary Sciences
Hao Wang, Dengke Chen, Xianghai An, Yin Zhang, Shijie Sun, Yanzhong Tian, Zhefeng Zhang, Anguo Wang, Jinqiao Liu, Min Song, Simon P. Ringer, Ting Zhu, Xiaozhou Liao
Summary: In situ straining transmission electron microscopy experiments on the Cantor high-entropy alloy (HEA) of CrMnFeCoNi demonstrate a crystalline-to-amorphous phase transformation in ultrafine-grained microstructures. The increase of crack-tip dislocation densities due to high lattice friction and grain boundary resistance triggers the transformation. The formation of amorphous nanobridges in the crack wake dissipates strain energies, providing effective toughening mechanisms for HEAs.
Article
Nanoscience & Nanotechnology
Mingchao Wang, Han Ye, Chenxi Zhai
Summary: The thermodynamic stability and energy loss of amorphous Si anodes during electrochemical cycling are investigated. The study finds that increasing the specific capacity leads to an increase in the kinetic overpotential. External pressure and reaction rate also increase the formation enthalpy and kinetic overpotential of the a-Si anodes.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Saba Nasir, Adnan Ali, Khalid Mahmood, Nasir Amin, Beriham Basha, M. S. Al-Buriahi, Z. A. Alrowaili, Yasir Ali, Qindeel Fatima, Hira Anwar, Umair Shehzad, Kashif Javaid
Summary: In this study, we successfully achieved the sequential growth of metal-semiconductor bilayer structure on textured glass substrates treated with HF using the thermal evaporation method. The crystallization of amorphous germanium thin films induced by aluminum was critically observed during the heat treatment process. The resulting temperature-assisted structural modifications led to controlled grain growth and a transformation from amorphous-to-polycrystalline for the Ge-thin film. Subsequent annealing also reduced the electrical resistivity and minimized band tail states and related structural defects, resulting in improved crystallinity.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Optics
L. Fedorenko, A. Medvids, V Yukhymchuk, A. Evtukh, H. Mimura, O. Hreshchuk, L. Grase, S. Soroka
Summary: The possibility of laser-induced structural transformation of amorphous SiOx thin layers into SiOx-based nanocomposite layers with increased Si nanoparticles has been studied. The average sizes of silicon nanoparticles were found to depend on the laser intensity and wavelength, with an increase observed as the laser intensity increased. The correlation between the increase in nanoparticle size and the decrease in amorphous phase in the SiOx film has been established.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Polymer Science
Hui Sun, Xiaoyan Zhou, Ying Leng, Xiao Li, Jianzhong Du
Summary: This study demonstrates a method to transform amorphous nanobowls into crystalline ellipsoids through UV-induced trans-cis isomerization. The approach utilizes an azobenzene-containing amphiphilic homopolymer as a building block and introduces hydrogen bonding and pi-pi interactions to promote the formation of nanobowls. Upon UV irradiation, the nanobowls disassemble and reassemble into crystalline ellipsoids. It is found that a high incubation temperature is critical for the isomerization and rearrangement of polymer chains.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Vishwadeepa Hazra, Sudipta Mondal, Pradip Pattanayak, Sayan Bhattacharyya
Summary: The transition from 3D to 2D lead halide perovskites can be achieved by cationic substitution, resulting in a 2D superlattice-like structure. The phase transition occurs when the Sn/Pb ratio is equal to or greater than 0.011, forming a superlattice structure with organic bilayers and inorganic blocks. Additionally, high photoluminescence quantum yield can be obtained after surface passivation.