Article
Chemistry, Multidisciplinary
Lu Zhou, Lauren Pusey-Nazzaro, Guanhua Ren, Ligang Chen, Liyuan Liu, Wentao Zhang, Li Yang, Jun Zhou, Jiaguang Han
Summary: The study presents a method for actively controlling SERS signals through photoinduced modulation under UV irradiation. By dynamically modulating the Fermi level of graphene due to the adsorption and desorption of gas molecules, the method was successfully validated in gas atmospheres of O-2, CO2, N-2, and air. Furthermore, it was applied to trace detection of pesticides on fruit peels, showcasing its practical implications in sensing.
Article
Chemistry, Physical
Wei Liu, Zihan Wang, Wenqian Yan, Zhiyang Zhao, Lingyan Shi, Longjin Huang, Yu Liu, Xuan He, Sheng Cui
Summary: This study utilizes three-dimensional graphene oxide aerogels as ultra-sensitive SERS substrates, achieving high SERS enhancement factor and low detection limit. The research expands the applications of graphene oxide aerogels and provides valuable insights for designing novel three-dimensional SERS substrates.
Article
Chemistry, Physical
Haining Li, Bing Yang, Biao Yu, Nan Huang, Lusheng Liu, Jiaqi Lu, Xin Jiang
Summary: Treatment of hydrogen plasma on silicon nanowires, followed by coatings of nanocrystalline diamond and multilayer graphene, enables enhanced Raman signals with reduced fluorescent background. The graphene-coated nanowires show lower fluorescent background than diamond-coated ones, with a minimum detection limit of 10(7) mol/L and an enhancement factor exceeding 10(4). The stable Raman enhancement is attributed to hydrogen-terminated graphene and the nanowire structure, independent of graphene layers and maintaining stability after exposure to the atmosphere for a month.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Di Liu, Huimin Gao, Wenji Jiang, Su Yan, Hao Liu, Junjie Chen, Sisi Wen, Wei Zhang, Xu Wang, Bing Zhao, Wei Song
Summary: In this study, three-dimensional Ag aerogel-supported Hg single-atom catalysts were used as an efficient SERS substrate for monitoring enhanced oxidase-like reactions. The effect of Hg2+ concentrations on the SERS properties of 3D Hg/Ag aerogel networks was investigated, and an optimized addition of Hg2+ resulted in specific enhancement. The formation of Ag-supported Hg SACs was confirmed using HAADF-STEM imaging and XPS measurement, and the oxidase-like catalytic mechanism of Hg/Ag SACs was revealed using DFT. This research provides a mild synthetic strategy for fabricating Ag aerogel-supported Hg single atoms with promising prospects in various catalytic fields.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Tianze Cong, Yifeng Zhang, Hui Huang, Chengwei Li, Zeng Fan, Lujun Pan
Summary: In this study, Ag nanoparticles were densely and uniformly synthesized on the surfaces of black-titanium dioxide nanoparticles through a facile two-step photocatalysis method. The resulting Ag/b-TiO2 substrate showed high sensitivity and reusability, making it suitable for detecting organic pollutants and potentially useful in food safety and environmental monitoring.
Article
Chemistry, Physical
Jihua Xu, Enze Lv, Xiaofei Zhao, Jing Yu, Shicai Xu, Jinmeng Li, Zhen Li, Mei Xue, Chao Zhang, Jie Pan
Summary: This study proposes a Au/Ag/CuO NW/PVDF substrate that enables highly sensitive SERS detection and efficient piezoelectric photocatalysis for the degradation of organic pollutant molecules. The enhanced SERS and catalytic performance are achieved through the coupling of piezoelectric and plasmonic effects.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Fan Kong, Buwei Tang
Summary: A soluble perylene diimide derivative is bonded to graphene oxide via esterification to create a flexible surface-enhanced Raman scattering active substrate for detecting rhodamine 6G. The esterification disrupts the crystalline structure of graphene oxide and promotes graphitization. Efficient charge transfer processes contribute to the enhanced Raman signals of rhodamine 6G on graphene oxide-perylene diimide.
VIBRATIONAL SPECTROSCOPY
(2023)
Article
Chemistry, Applied
Li Zhang, Ximo Wang, Chen Chen, Ruiqiang Wang, Xuguang Qiao, Geoffrey I. N. Waterhouse, Zhixiang Xu
Summary: A simple and sensitive SERS sensor based on gold nano-stars@reduced graphene oxide (AuNS@rGO) was developed for the detection of benzo[a]pyrene in foods. Benzo[a]pyrene was adsorbed on reduced graphene oxide and detected using SERS, with the large electric fields generated by the gold nanostars greatly amplifying the Raman signals. The SERS sensor exhibited a wide linear detection range and a low limit of detection. Chicken samples spiked with benzo[a]pyrene were successfully assayed using the sensor.
Article
Chemistry, Physical
Longkun Que, Jianping Ai, Taihuan Shao, Ruipeng Han, Junhua Su, Yifan Guo, Yifan Liu, Jinyang Li, Xian Jian, Zuowan Zhou
Summary: Designing large-area and high-quality graphene and its derivatives for surface-enhanced Raman scattering (SERS) is crucial for achieving high sensitivity and stability. However, the efficient preparation and regulation of such structures present significant challenges. In this study, fluorinated graphene (fGE) was developed for high-performance SERS through a simple process of fluorination. By controlling the nucleation density of graphene growth with NH3-plasma assistance, large-area graphene (GE) was obtained and then reacted with fluorocarbon to produce fGE. The resulting fGE films showed exceptional molecular SERS sensitivity for Rhodamine 6G (R6G) with a limit as low as 10-9 mol/L.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Chemical
Mariia Dmitrenko, Anna Kuzminova, Andrey Zolotarev, Denis Markelov, Andrei Komolkin, Evgeniia Loginova, Tatiana Plisko, Katsiaryna Burts, Alexandr Bildyukevich, Anastasia Penkova
Summary: This study focuses on improving the performance of polyacrylonitrile (PAN) membranes in ultrafiltration through the introduction of TiO2 particles. Different methods of TiO2 immobilization have varying effects on the structure and performance of PAN membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Neradabilli Prabhakarrao, Tirukkovalluri Siva Rao, Kapuganti Venkata Divya Lakshmi, Gorli Divya, Genji Jaishree, Imandi Manga Raju, Shaik Abdul Alim
Summary: The study synthesized Nb doped TiO2/rGO nanocomposites via sol-gel route at lower temperature with different loading amounts of GO, characterized the materials using various instruments, and examined their photocatalytic performance under visible light irradiation. Results showed that the nanocomposite with 5wt% of GO content achieved the highest degradation efficiency for RhB dye. The unique properties of GO in the nanocomposite help enhance photocatalytic activity by reducing charge carrier recombination rate.
SUSTAINABLE ENVIRONMENT RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Qian Zhang, Rui Yang, Jie Li, Chunxia Pang, Bowen Chen
Summary: The structural, energetic, and Raman vibrational properties of 4-cyanopyridine (4-CNP) adsorbed on Zn12O12 and Zn12O12-graphene oxide (GO) substrates were investigated using DFT-D3. The chemisorption of 4-CNP on Zn12O12 and Zn12O12-GO occurred at the Zn atom through its pyridine N atom. The interaction energies were -1.492 and -1.436 eV respectively. Humidity had little effect on the adsorption properties, while dispersion forces influenced the interaction energy of adsorbed 4-CNP on Zn12O12.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Amin Khan, Shabab Hussain, Xinsheng Peng
Summary: This study presents a unique SERS substrate that enhances the detection of trace materials. By increasing hotspots and quenching fluorescence, the substrate demonstrates high stability and improved detection capabilities.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Physical
Shaochong Yin, Hongxing Wu, Xiaobin Yi, Zhiyuan Huang, Chengping Ye, Pengfei Li, Yixuan Zhang, Junqin Shi, Ke Hua, Haifeng Wang
Summary: This study found that the adsorption of graphene oxide (GO) on bearing steel can be improved by preparing a boronized functionalization layer on the surface. The boronized surface, lubricated with 1 wt % GO nanosheets as water-based additives, achieved an ultralow friction state with a friction coefficient of 0.03. Molecular dynamics (MD) simulation revealed that the high adhesion energy between the boronized surface and GO contributed to the preferential adsorption of GO on the sliding surface to form the tribofilm, leading to impressive synergistic lubrication performance.
Article
Spectroscopy
Yue-Jiao Zhang, Qing-Qi Chen, Xing Chen, An Wang, Zhong-Qun Tian, Jian-Feng Li
Summary: SHINERS technology uses silica-coated gold nanoparticles to overcome the limitations of SERS technology, while graphene as a two-dimensional material shows potential in SERS chemical enhancement. Au@G nanoparticles prepared by CVD can control the thickness of the graphene shell, and the Pt-on-Au@G satellite structures enable monitoring of catalytic reaction mechanisms.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Nanoscience & Nanotechnology
Yanfen Wang, Shuai Ma, Hai Yu, Yin Liu, Juan Gao, Lei Yang, Miao Zhang, Gang He, Zhaoqi Sun
Summary: It was found that TiO2 nanosheet array as a supporting substrate can lead to a uniform distribution of Ag nanoparticles and enhance the SERS signals, resulting in better detection performance. Compared with other nanostructures, the Ag/TiO2(S) array exhibited a higher enhancement factor and good reproducibility.
Article
Materials Science, Multidisciplinary
Yanfen Wang, Juan Gao, Yin Liu, Mengting Li, Miao Zhang, Gang He, Zhaoqi Sun
Summary: Novel Fe3O4/ZnO magnetic nanocomposites with hierarchical morphology were synthesized by a facile two-step liquid chemical method. The composites showed a large specific surface area, enhanced optical response, and excellent superparamagnetic property. They exhibited higher adsorption capacity to Rhodamine B dyes and superior photocatalytic efficiency for RhB degradation under UV light, as well as more efficient magnetic separation and better photoelectrochemical property than individual oxide. The favorable photocatalytic activity was attributed to the synergistic effect of unique microstructure, large surface area, and strong light absorption.
Article
Environmental Sciences
Irfan Ali Phulpoto, Bowen Hu, Yanfen Wang, Fabrice Ndayisenga, Jinmei Li, Zhisheng Yu
Summary: The freshwater lake ecosystem contains valuable microbial diversity and can help address environmental issues like petroleum-hydrocarbon contamination. This study explored microbial communities from different layers of a freshwater lake and found significant changes in enriched samples, with efficient hydrocarbon-degrading capabilities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Microbiology
Bala Singavarapu, Remy Beugnon, Helge Bruelheide, Simone Cesarz, Jianqing Du, Nico Eisenhauer, Liang-Dong Guo, Ali Nawaz, Yanfen Wang, Kai Xue, Tesfaye Wubet
Summary: The study emphasizes that the mycorrhizal type of trees is a key factor shaping the diversity and composition of soil microbial communities. Additionally, higher levels of tree diversity promote convergence of soil microbial communities.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Ximing Zhang, Jingyu Wang, Yang Fan, Hengdong Ren, Zhenying Liu, Yanfen Wang, Yin Liu, Hongcun Bai, Lingbing Kong
Summary: NiCo alloy/C with rhombic dodecahedron structure and superior microwave absorption performance was prepared using ZIF-67 as raw material. By adjusting the doping amount of Ni and pyrolysis temperature, the impedance matching of NiCo alloy/C was improved. The composite material showed potential to be a lightweight microwave absorber with high absorption properties.
Article
Multidisciplinary Sciences
Ming-Hui Wu, Sheng-Yun Chen, Jian-Wei Chen, Kai Xue, Shi-Long Chen, Xiao-Ming Wang, Tuo Chen, Shi-Chang Kang, Jun-Peng Rui, Janice E. Thies, Richard D. Bardgett, Yan-Fen Wang
Summary: Permafrost degradation alters the diversity of microbial communities in the active layer, potentially leading to carbon loss and a positive carbon feedback effect. This study provides valuable insights into the mechanisms of carbon loss in degraded permafrost, which can aid in modeling carbon emissions under future scenarios.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Microbiology
Lin Chen, Lingyan Li, Shengjie Zhang, Wenting Zhang, Kai Xue, Yanfen Wang, Xiuzhu Dong
Summary: This study identified abundant Ca. Methanoperedens and iron in the cold Zoige wetland at Tibetan Plateau, proposing a novel species, Ca. Methanoperedens psychrophilus, which contains a full suite of CO2 reductive methanogenic genes and unique gene categories related to cold adaptability. This work reports the first evidence of a methanotroph performing anaerobic oxidation of methane in an alpine wetland.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Plant Sciences
Mukan Ji, Weidong Kong, Hongzeng Jia, Chen Ding, Alexandre M. Anesio, Yanfen Wang, Yong-Guan Zhu
Summary: This study used high-throughput sequencing to examine the characteristics of algal, bacterial, and fungal communities in red and green snow in the Antarctic Peninsula, revealing distinct features. The microbiome in red snow exhibited a more stable network and higher complexity compared to green snow, indicating a higher resistance to external disturbances.
Article
Multidisciplinary Sciences
Xue Gao, Sheng Wang, Yan-Fen Wang, Shuang Li, Shi-Xin Wu, Rong-Ge Yan, Yi-Wen Zhang, Rui-Dong Wan, Zhen He, Ren-De Song, Xin-Quan Zhao, Dong-Dong Wu, Qi-En Yang
Summary: In this study, we assembled two chromosome-level genomes for wild and domestic yaks, and identified structural variants (SVs) and differentially expressed genes related to high-altitude adaptation. Additionally, the construction of a single-cell gene expression atlas revealed a yak-specific endothelial cell subtype. These findings provide new insights into the genetic and cellular basis of yak adaptation to high-altitude environments and have important implications for understanding responses to hypoxia in large mammals and humans.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Yanfen Wang, Jianqing Du, Zhe Pang, Yali Liu, Kai Xue, Yann Hautier, Biao Zhang, Li Tang, Lili Jiang, Baoming Ji, Xingliang Xu, Jing Zhang, Ronghai Hu, Shutong Zhou, Fang Wang, Rongxiao Che, Di Wang, Chaoting Zhou, Xiaoyong Cui, Nico Eisenhauer, Yanbin Hao
Summary: The diversity of resources has an impact on the relationship between productivity and biodiversity, with different habitats showing different relationships. When excluding the direct effects of resources, the relationship in high-resource habitats becomes negative.
NATIONAL SCIENCE REVIEW
(2022)
Article
Environmental Sciences
Yanfen Wang, Lili Jiang, Zongsong Wang, Minghua Song, Shiping Wang
Summary: Climate warming and increasing nitrogen deposition promote nitrogen and phosphorus availability in soil, affecting ecosystem structure and function. However, studies on nutrient enrichment have mainly focused on nitrogen rather than phosphorus, especially in high-altitude areas where nitrogen limits plant growth, hindering predictions of ecosystem changes under future climate conditions. This study found that phosphorus enrichment increased species richness and aboveground net primary production stability, with species asynchrony and dominant species stability driving the variation in stability. These findings highlight the importance of understanding the balance between nitrogen and phosphorus effects on ecosystem structure and function for predicting the impacts of global change on ecosystem stability.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Microbiology
Bala Singavarapu, Jianqing Du, Remy Beugnon, Simone Cesarz, Nico Eisenhauer, Kai Xue, Yanfen Wang, Helge Bruelheide, Tesfaye Wubet
Summary: Loss of multifunctional microbial communities can negatively affect ecosystem services, especially forest soil nutrient cycling. Therefore, exploration of the genomic potential of soil microbial communities, particularly their constituting subcommunities and taxa for nutrient cycling, is vital to get an in-depth mechanistic understanding for better management of forest soil ecosystems.
MICROBIOLOGY SPECTRUM
(2023)
Article
Ecology
Chuan Chen, Lingyan Li, Yanfen Wang, Xiuzhu Dong, Fang-Jie Zhao
Summary: Microorganisms are involved in the biogeochemical cycling of arsenic (As), transforming As between different forms and oxidation states. Methylation of As is enhanced by microbes in paddy soil, resulting in the formation of dimethylarsenic (DMAs), which can cause rice straighthead disease. In this study, we found that methanogenic archaea, particularly Methanomassiliicoccus, play a crucial role in demethylating pentavalent DMAs.
Review
Environmental Sciences
Yanfen Wang, Wangwang Lv, Kai Xue, Shiping Wang, Lirong Zhang, Ronghai Hu, Hong Zeng, Xingliang Xu, Yaoming Li, Lili Jiang, Yanbin Hao, Jianqing Du, Jianping Sun, Tsechoe Dorji, Shilong Piao, Changhui Wang, Caiyun Luo, Zhenhua Zhang, Xiaofeng Chang, Mingming Zhang, Yigang Hu, Tonghua Wu, Jinzhi Wang, Bowen Li, Peipei Liu, Yang Zhou, A. Wang, Shikui Dong, Xianzhou Zhang, Qingzhu Gao, Huakun Zhou, Miaogen Shen, Andreas Wilkes, Georg Miehe, Xinquan Zhao, Haishan Niu
Summary: This review examines the impacts of climate change and human activities on grasslands in the Qinghai-Tibetan Plateau. It discusses the changes in vegetation and soil, as well as the drivers behind these changes. The study finds that rising temperatures have been key in driving vegetation increases, while intense livestock grazing has caused grassland degradation. Effective restoration can be achieved through management policies and adaptive management, leading to improvements in net primary production.
NATURE REVIEWS EARTH & ENVIRONMENT
(2022)
Article
Engineering, Chemical
Qingzhou Zhao, Yanfen Wang, Zhihong Xu, Zhisheng Yu
Summary: The recent interest in removing aqueous cadmium and lead has led to advancements in adsorption on biochar, which has been proven to effectively remove these heavy metals from water. The experiments showed that the adsorption of cadmium and lead followed the Langmuir and Freundlich models, and were influenced by temperature.
DESALINATION AND WATER TREATMENT
(2021)
Article
Materials Science, Ceramics
Zilong Xiong, Wenzhuo Xue, Mujun Li, Feihu Tan, Yupeng Chen, Hongyu Yu
Summary: In this study, CBS glass/Al2O3 composites were developed for LTCC applications based on a CaO-B2O3-SiO2 (CBS) glass system with a high boron content. The study revealed that the softening of glass and interfacial reaction between the glass and Al2O3 were the two most important factors affecting LTCC's densification process. Real-time shrinkage rate of LTCC during sintering was successfully simulated, and it was proven that the formation of the CaAl2(BO3)O phase played a significant role in reducing glass viscosity and promoting dense structure formation. The resulting LTCC composite exhibited excellent performance for high-frequency applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Saurabh Kumar Sharma, Vinita Grover, Rakesh Shukla, Abid Hussain, Ambuj Mishra, Pawan Kumar Kulriya
Summary: In this study, the disordering caused by swift heavy ion irradiation in two different compositions of pyrochlore structures was investigated. X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy were used to analyze the samples before and after irradiation. It was found that both compositions underwent amorphization due to irradiation, with a slower rate observed in Nd1.8Zr2.2O7.1. The irradiation-induced modified track region in Nd1.8Zr2.2O7.1 consisted of defect-rich pyrochlore structure, anion-deficient fluorite structure, and amorphous domains.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiabei He, Mengshan Song, Ming Yang, Miaomiao Zhu
Summary: This study investigates the influence of ion irradiation on high-entropy ceramics and finds that irradiation-induced lattice rearrangement can improve the radiation resistance of these ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yajie Yu, Shi He, Zhengang Zhang, Haihua Chen, Peipeng Jin, Binnian Zhong, Linhui Zhang, Liping Wang, Cheng Lu
Summary: Silicide ceramics, including tantalum disilicide (TaSi2), are known for their exceptional physical properties but are limited in practical applications due to their inherent brittleness at room temperature. In this study, we successfully improved the mechanical properties of TaSi2 ceramics and increased their electrical conductivity by modifying the preparation methods and sintering conditions. These findings provide valuable insights for future applications of TaSi2 and the design of advanced ceramic materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jian Li, Jia Liu, Yongcui Zhang, Wei Sun, Yang Wang, Haitao Wu, Ling Li, Chuanbing Cheng, Yingying Wang, Ke Tan, Futian Liu
Summary: Microstructure design plays a crucial role in regulating the microwave dielectric properties of materials, however, the understanding of frequency temperature stability and related micromechanism remains limited. In this study, a combination of first-principles calculations and experimental observation was used to investigate the correlation among sintering behavior, crystal structure, bonding nature, and microwave dielectric properties of LnPO(4) (Ln = Eu, Pr) ceramics. The research findings systematically clarify the optimized effect and micromechanism of lanthanides on the dielectric properties of monazite ceramics, providing insights into the design and enhancement of microwave dielectric materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Wenqian Pan, Xizhen Xia, Wei Zhou, Yang Li
Summary: The study investigates the frictional and wear behaviors of carbon fiber-reinforced SiC ceramic matrix composites with different fiber orientations mating with ceramic balls. The results show that fiber orientation significantly affects the friction and wear properties of the composites. Pads with randomly arranged fibers demonstrate better friction stability and lower wear volume, potentially suitable for bearing material applications. The research also explores the factors influencing the formation of continuous tribo-film and identifies abrasive wear and oxidation wear as the dominant wear mechanisms for the friction pairs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sergey Nikolaevich Perevislov, Ilya Evgenievich Arlashkin, Valentina Leonidovna Stolyarova
Summary: This paper describes the synthesis and sintering of MAX phases in the Zr-Al-C system. Different mixtures of initial Zr/Al/C and Zr/Al/ZrC powders were used to synthesize Zr2AlC and Zr3AlC2 MAX phases. The highest content of Zr3AlC2 MAX phase was obtained using a component ratio of 1:1.5:2-51.1 vol.% of Zr/Al/ZrC powders.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Weijia Luo, Xubin Wang, Baiheng Bai, Jianli Qiao, Xingcong Chen, Yongzheng Wen, Jingbo Sun, Lingxia Li, Ji Zhou
Summary: This study successfully establishes the relationship between internal strain and dielectric loss by synthesizing and designing specific structure of tungsten bronze ceramics, and concludes that controlling internal strain can effectively reduce dielectric loss. This research is of great significance for the development of future all-ceramic non-Hermitian devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Santanu Mondal, Juan Diego Shiraishi Lombard, Sreenivasulu Gollapudi, Carolina Tallon, Jie-Fang Li, Dwight Viehland
Summary: Ultrafast high-temperature sintering (UHS) is an effective method for rapidly densifying ZrB2 powders. The final grain size increases with longer sintering duration. X-ray diffraction and energy-dispersive spectroscopy show crystalline phase and compositional uniformity in ZrB2 after UHS.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
JiaNan Wang, ZhiQiang Li, YongZheng Zhu, Yao Liang, Yan Cui, HuaLong Tao, Bo Song, Alexander Nikiforov, ZhiHua Zhang
Summary: First-principles calculations were performed to investigate the crystal structure, electronic structure, and ion diffusion of sulfur-doped Li2FeSiO4. The results showed that sulfur doping can improve the electronic conductivity and reduce the energy barrier for ion diffusion.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Xiaodi Dai, Serdar Aydin, Mert Yuecel Yardimci, Gunter Reekmans, Peter Adriaensens, Geert De Schutter
Summary: This study investigates the rheological behavior, solidification process, and nanostructure changes of sodium hydroxide-activated slag (NH-AAS) and sodium silicate-activated slag (SS-AAS) pastes over time. The results show that NH-AAS and SS-AAS release similar heat and reach a similar reaction degree at their initial setting times, but have different gel structures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yanliang Ji, Simon Becker, Zichen Lu, Alexander Mezhov, Regine von Klitzing, Schmidt Wolfram, Dietmar Stephan
Summary: This study reveals the significant influence of resting time on the rheological properties of cement suspensions, which is closely related to non-absorbed polycarboxylate superplasticizers (PCEs) size variation. Adsorbed PCE during resting tends to bridge particles instead of dispersing them, leading to an increased yield stress.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yifeng Huang, Xin Wang, Yinchang Ma, Xiang Lv, Jiagang Wu
Summary: This study investigates the effect of K/Na ratio on the phase structure, ferroelectric domains, and piezoelectric properties of potassium sodium niobate (KNN)-based ceramics. It reveals that high Na+ content leads to large ferroelectric domains, while high K+ content results in local polarity heterogeneity and distinct dielectric relaxational behavior. The balanced local polarity and stress heterogeneities contribute to improved piezoelectricity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zun Xia, Yedong Rong, Hao Li, Ye Dong, Hongbo Yu, Jie Xu, Xiuhui Wang, Jinlong Yang
Summary: This study presents the synthesis of hollow MgAl2O4 particles in situ within porous ceramics, resulting in volume expansion and the formation of a hierarchical pore structure, leading to a significant improvement in compressive strength.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Honglong Wang, Zhiguo Sun, Faming Xia, Chenguang Yang, Xiaoguang Wang, Jintang Li, Linxu Jiang
Summary: In this study, the micro-geometry morphology variation and microstructural transformation mechanism of muscovite crystals under electron beam irradiation were explored. The results revealed the instability of the muscovite lattice under irradiation, as well as the expansion and shrinkage of the lattice with increasing dose. The study also identified changes in chemical structure and other mechanisms involved. These findings are significant for the design of radiation-resistant silicate materials and the manufacturing of electronic components used in the aerospace industry.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
