Article
Chemistry, Physical
Yannan Zhou, Qun Xu
Summary: Space confined reactions are a viable strategy for achieving important properties in functional materials. Various systems for confinement have been reported, but the focus has primarily been on the concept of space confinement while neglecting the changes in confined space itself. Supercritical CO2 has the potential to reveal structural changes in confined spaces, known as the anti-nanoconfinement effect, which can lead to a series of variations in electronic band and structural transformation.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Engineering, Environmental
Xiaoyan Zhang, Guihong Sun, Shanshan Jia, Hanlu Xie, Zewen Kang, Wenjie Chen, Malin Cui, Bingqing Wang, Bo Wang, Xiangrong Chen, Da-Peng Yang
Summary: This study successfully developed a new type of photocatalytic antibacterial nanomaterials, which can effectively destroy infections caused by antibiotic-resistant bacteria. The charge transfer between Ni(PO3)(2) and defective carbon in the nanomaterials was found to be one of the reasons for their high antibacterial performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Cody Landry, Alexander Morrison, Mehdi Esmaeili, Khashayar Ghandi
Summary: Through a combination of spectroscopy, diffraction, and magnetic measurements, it is found that ZnO rods made hydrothermally using a combination of magnetic field and gravity exhibit size-dependent superparamagnetic properties, which are attributed to Zn defects.
Article
Chemistry, Multidisciplinary
Antonio D. Lozano-Gorrin, Bradley Wright, Paul A. Dube, Casey A. Marjerrison, Fang Yuan, Graham King, Dominic H. Ryan, Cristina Gonzalez-Silgo, Lachlan M. D. Cranswick, Andrew P. Grosvenor, John E. Greedan
Summary: The study investigates the preparation of the BaIn1-xFexO2.5+delta series under air and argon conditions with various experimental techniques. The results show differences in crystal structures of materials with different Fe contents, with the Fe3+/Fe4+ mixed valence states playing a crucial role in determining the properties of the materials.
Article
Chemistry, Multidisciplinary
Sagnik Das, Uttam Kumar Ghorai, Rajib Dey, Chandan Kumar Ghosh, Mrinal Pal
Summary: This paper reports the successful tuning of defect-mediated blue phosphorescence of ZnO nanopowders by annealing at different temperatures, resulting in changes in intensity, shade, and color temperature. Multiple characterization techniques were used to examine the microstructural, compositional, and band-structure details, and optical properties of the samples were studied through PL and tau-PL spectroscopy.
Article
Chemistry, Applied
Tianyang Li, Hong Pan, Lihui Xu, Yong Shen, Keting Li
Summary: Lignin-based carbon/zinc oxide (LCZ) composites with excellent porous structures were prepared using a one-step carbonization method. The LCZ composite showed the largest specific surface area and pore volume when carbonized at 600 degrees C for 2 hours with a QAL addition of 4g. The LCZ composite exhibited improved photodegradation performance and material stability compared to pure ZnO.
JOURNAL OF POROUS MATERIALS
(2022)
Article
Physics, Multidisciplinary
Rong Guo, Yilv Guo, Yehui Zhang, Xiaoshu Gong, Tingbo Zhang, Xing Yu, Shijun Yuan, Jinlan Wang
Summary: Based on first-principles calculations, the effect of electron doping on Neel-type anti-ferromagnetic GdI3 is studied. It is found that Fermi surface nesting occurs when more than 1/3 electron per Gd is doped, resulting in the failure to obtain a stable ferromagnetic state. Interestingly, GdI3 with appropriate Mg/Ca doping (1/6 Mg/Ca per Gd) turns into a half-metallic ferromagnetic state. This AFM-FM transition is due to the transfer of doped electrons to the spatially expanded Gd-5d orbital and the hybridization between 5d and 4f orbitals.
FRONTIERS OF PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Jiasen Guo, George Yumnam, Ashutosh Dahal, Yiyao Chen, Valeria Lauter, Deepak K. Singh
Summary: Geometrically frustrated materials, such as spin ice or kagome lattice, exhibit exotic Hall effect phenomena due to spin chirality. The study explores Hall effect mechanisms in an artificial honeycomb spin ice of Nd-Sn element, revealing a significant enhancement in Hall signal at higher temperatures and distinct increment in Hall resistivity at very modest fields in the antiferromagnetic state of neodymium. The experimental findings suggest the development of a new research vista to study the planar and field induced Hall effects in artificial spin ice.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Analytical
Yang Shen, Zhihao Yuan, Zhen Cui, Deming Ma, Pei Yuan, Kunqi Yang, Yanbo Dong, Fangping Wang, Enling Li
Summary: In this study, the adsorption of CO, NH3, NO, and NO2 gases on intrinsic and vacancy-deficient Graphite-like ZnO (g-ZnO) was systematically investigated using density functional theory (DFT). The results showed that the introduction of Zn vacancy (V-Zn) significantly increased the adsorption energy of NH3, NO, and NO2 on defective g-ZnO. Furthermore, vacancies also reduced the adsorption height of the gases on V-Zn/g-ZnO. These findings contribute to the enrichment of defect detection methods and the design of gas detection devices.
Article
Construction & Building Technology
Fatih Dogan, Heydar Dehghanpour
Summary: The study compared the hydrophobic properties of cementitious mortar surfaces coated with silicone-based TiO2, ZnO, and recycled nano carbon black (RNCB) filled composites, and evaluated the surface performance through various tests. The results showed that uniform distribution of particles on the surface, with the quantity of TiO2 and ZnO particles in the crystalline phase being important factors in crystallite sizes and lattice strain. The hydrophobic properties of RNCB particles on cementitious material surfaces are thought to be crucial in reducing wettability.
JOURNAL OF BUILDING ENGINEERING
(2021)
Review
Chemistry, Physical
Shenghui Shen, Yanbin Chen, Jiancang Zhou, Haomiao Zhang, Xinhui Xia, Yefeng Yang, Yongqi Zhang, Abolhassan Noori, Mir F. Mousavi, Minghua Chen, Yang Xia, Wenkui Zhang
Summary: Biosynthesis methods, utilizing various biotechniques and microbe factories, have shown potential in engineering novel carbon-based materials with exceptional properties. This review systematically outlines the synthesis mechanisms and structural design of carbon-based nanostructures derived from biotechnology, as well as their applications in electrochemical energy storage devices. The relationship between architecture, composition, electrochemical behavior, and performance enhancement mechanisms is discussed. Development perspectives and challenges towards rational design of advanced materials for the low-carbon economy are proposed.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Inorganic & Nuclear
S. P. Gubin, Yu. A. Koksharov, Yu. V. Ioni
Summary: This review focuses on high-temperature ferromagnetism in nonmagnetic materials, particularly in nanoparticles where the phenomenon is most pronounced due to surface defect structures. It discusses traditional theoretical models as well as the ferron model, which is used to explain properties of advanced magnetic materials with phase separation.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
M. P. F. de Godoy, X. Gratens, V. A. Chitta, A. Mesquita, M. M. de Lima Jr, A. Cantarero, G. Rahman, J. M. Morbec, H. B. de Carvalho
Summary: This study reports on achieving room temperature ferromagnetism in ZnO samples through Co-doping. By introducing controlled defects via heat treatments in a reductive atmosphere and conducting structural analysis and magnetometry, the magnetic behavior is fully explained in terms of the bound magnetic polaron model. The origin of the observed defect-induced ferromagnetism is attributed to the ferromagnetic coupling between Co ions mediated by magnetic polarons due to zinc interstitial defects.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Yogesh Sharma, Binod Paudel, Amanda Huon, Matthew M. Schneider, Pinku Roy, Zachary Corey, Rico Schonemann, Andrew C. Jones, Marcelo Jaime, Dmitry A. Yarotski, Timothy Charlton, Michael R. Fitzsimmons, Quanxi Jia, Michael T. Pettes, Ping Yang, Aiping Chen
Summary: This study investigates the relationship between strain engineering, point defects, and ferromagnetism in actinide epitaxial thin films, and provides new insights into the influence of coupled order parameters on the emergent properties of actinide materials.
Article
Chemistry, Multidisciplinary
Jingfeng Li, Thomas Joseph, Mahdi Ghorbani-Asl, Sadhu Kolekar, Arkady Krasheninnikov, Matthias Batzill
Summary: This study investigates the electronic structure of edges and point defects in 2D-PtSe2 using STM and DFT. The experiment finds that stoichiometric zigzag edge terminations are energetically favored, and Se-vacancies, Pt-vacancies, and Se-antisites are identified as dominant defects in PtSe2. Defects in PtSe2 are found to induce magnetism, with Pt-vacancies exhibiting spin polarized states. These atomic-scale insights into defect-induced electronic states provide fundamental support for defect engineering of PtSe2-monolayers and the potential for engineering magnetic properties in PtSe2 nanoribbons.
ADVANCED FUNCTIONAL MATERIALS
(2022)
