Article
Materials Science, Ceramics
Anand Gupta, Shikhar Nigam, Vijay M. Shinde
Summary: The gas-phase thermal decomposition of BCl3+CH4+H-2 mixtures, which is important for the chemical vapor deposition of boron carbide, was modeled using a detailed chemical kinetic mechanism. A reduced mechanism was derived from the detailed mechanism to facilitate reactor design.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Ryo Matsumoto, El Hadi S. Sadki, Hiromi Tanaka, Sayaka Yamamoto, Shintaro Adachi, Adnan Younis, Hiroyuki Takeya, Yoshihiko Takano
Summary: The method reported in the study enables direct deposition of boron-doped amorphous carbon films through focused ion beam-assisted chemical vapor deposition, with the films exhibiting typical semiconducting behavior. This one-step process for simultaneous deposition, boron-doping, and patterning of the films offers a convenient and effective way to fabricate boron-doped amorphous carbon-based devices without the need for templates.
Article
Chemistry, Multidisciplinary
Weichen Xiao, Mark A. Buckingham, Yi Li, Kerry Hazeldine, Bing Han, Sarah H. Cartmell, Alexander S. Eggeman, Alex S. Walton, David J. Lewis
Summary: This study reports the synthesis of a high entropy (CuZnCoInGa)S metal sulfide thin film using molecular precursors and deposited by AACVD for the first time.
CHEMICAL COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Kenta Hori, Hiroki Kawakami, Hitoshi Habuka
Summary: An SiCNO film with 28% nitrogen was formed without heating assistance using SiH3CH3, N-2 and Ar gases, followed by etching with 10% ClF3 gas at room temperature. The removal rate of Si-N component was found to be faster than that of Si-C, Si-O and C-N components during the etching process, indicating a behavior consistent with compounds formed between Si, C, N and O.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Paolo Giusto, Daniel Cruz, Tobias Heil, Nadezda Tarakina, Maddalena Patrini, Markus Antonietti
Summary: By chemically vapor depositing BCN thin films from a single source precursor, high transparency and refractive index values for reflective mirrors and lenses are achieved. These wide-bandgap semiconductor materials, with positive valence band, demonstrate stability against oxidation making them ideal for protective coatings and charge transport layers in solar cells. The simple and low-hazard method can open up possibilities for BCN thin films in optics and optoelectronics.
Article
Multidisciplinary Sciences
Omer Refet Caylan, Goknur Cambaz Buke
Summary: The study reports the synthesis of large-area thin Mo2C crystals at lower temperatures using liquid In, showing promising results in terms of growth mechanism and proposed model.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Ceramics
Han-Yin Liu, Yu-Jie Liao, Hung-Yi Wu
Summary: This study investigates the deposition of InSnZnO thin films using mist chemical vapor deposition with different nitrogen/oxygen ratios of carrier gases. The results show that using nitrogen as the carrier gas leads to the highest field-effect mobility, and using a mixed nitrogen/oxygen carrier gas improves the electrical characteristics of the films.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Antoine Raison, Nathalie Prud'homme, Wu Wang, Diana Dragoe, Nita Dragoe
Summary: We have successfully synthesized a multi-cationic oxide (MgCoNiCuZn)O through pulsed liquid injection chemical vapor deposition. The synthesis was carried out at temperatures ranging from 400 degrees C to 550 degrees C, using five metal-organic precursors solubilized in dimethoxyethane (DME). The microstructure of the material was analyzed using HRTEM with HAADF, SEM, EDS, XPS, and XRD techniques before and after annealing.
Article
Materials Science, Coatings & Films
Jorge Sanchez Espinoza, Fatma Trabelsi, Christophe Escape, Ludovic Charpentier, Marc Fivel, Elisabeth Blanquet, Frederic Mercier
Summary: Ti3SiC2-SiC multilayer film coatings were synthesized using the high temperature reactive chemical vapor deposition technique. The coatings exhibited good mechanical integrity and high temperature stability.
SURFACE & COATINGS TECHNOLOGY
(2022)
Review
Physics, Applied
Aleksander M. Wrobel, Pawel Uznanski
Summary: Our study reviews the production of amorphous hydrogenated silicon carbonitride thin films through remote plasma chemical vapor deposition (RP-CVD) using 1,1,3,3-tetramethyldisilazane as a single-source compound with H2 + N2 upstream-gas mixture. The effects of nitrogen content in the mixture on the RP-CVD process, chemical structure, surface morphology, and properties of the deposited films are described. The a-SiCN films show great potential as coatings for improving the surface mechanics of engineering materials in advanced technologies.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Muhammet Nasuh Arik, Cennet Yildirim, Nuri Solak
Summary: In this study, the oxidation resistance of carbon fibers in high-temperature applications was improved by preparing boron carbide coatings using a modified chemical vapor deposition method. The coatings were found to significantly enhance the oxidation resistance of the carbon fibers.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Physical
W. Ke, K. Yang, X. D. Zhu
Summary: Amorphous Si-B-N alloy films prepared on SS304 stainless steel substrates by RF-PCVD technique exhibited improved hardness and wear resistance, with a surface morphology of hilly clusters composed of small particles.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Zhanjie Lu, Meijie Zhu, Gehui Zhang, Wenyu Liu, Shuo Han, Le Wang
Summary: A back-gated WSe2 field effect transistor (FET) with an amorphous BN (a-BN) capping layer was fabricated using a direct chemical vapor deposition (CVD) assemble technique, and its electrical performance was investigated. The field effect mobility and the on/off current ratio of the a-BN capped WSe2 FET both improved by one order of magnitude due to the clean and conformal contact between the BN and WSe2 interface, reducing extrinsic scattering. This technique could also be applied to other 2D material based devices.
RESULTS IN PHYSICS
(2022)
Article
Crystallography
Feifei Lan, Rui Zhou, Ziyue Qian, Yuansha Chen, Liming Xie
Summary: In this study, Fe3O4 thin films with room-temperature ferrimagnetism were successfully grown using a simple chemical vapor deposition method. The films maintained good magnetic properties even at thicknesses as low as 4 nm. Various analysis techniques were used to study the structure and quality of the films, and it was found that the saturation magnetization was higher than that of bulk materials and the Verwey transition was observed. This work provides a new method for synthesizing ultrathin films with ferrimagnetic properties for applications in electronics, spintronics, and memory devices.
Article
Chemistry, Physical
Lianping Chen, Yuanhong Gao, Yibin Chen, Jun Cao
Summary: The influence of europium on the structure and luminescent properties of CaWO4 thin films was investigated, and the sputtering yields of different compounds were studied. The results showed that the compositions of the deposits matched those of the targets, and the lattice constants increased under certain conditions. The preferential growth along a specific crystal plane also increased due to the substitution of Ca2+ with Eu2+. Doping of Eu led to improved photoluminescence performance of the films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Sarahi Pacheco-Espinoza, Alejandro I. I. Cuesta-Balderas, Jorge Vazquez-Lujano, Abril Rosiles-Aguilera, Maria A. Hernandez-Perez, Felipe Cervantes-Sodi, Fei Chen, Qiang Shen, Rong Tu, Jorge R. R. Vargas-Garcia, Lian-Meng Zhang
Summary: The development of 1D cerium oxide (CeO2) hollow nanostructures has attracted attention for their superior properties and anisotropic geometry. This study reports a novel method to fabricate multiwalled CeO2-delta nanotubes (CeO2-delta NTs) by converting functionalized multiwalled carbon nanotubes (f-MWCNTs) through oxidation and dehydration reactions. The CeO2-delta NTs exhibit a low direct band gap and an unusually high presence of Ce3+ ions and surface O vacancies.
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2023)
Article
Nanoscience & Nanotechnology
Song Zhang, Chongjie Wang, Tenghua Gao, Jinrong Hu, Pengjian Lu, Bingjian Guo, Qingfang Xu, Kai Liu, Baowen Li, Rong Tu, Meijun Yang, Kazuya Ando
Summary: Interfacial engineering can be used to obtain EMI shielding composites with thin thickness. In this study, a Ni nanoparticle/SiC nanowhisker/carbon cloth nanoheterostructure was fabricated, and the formation of a Ni/SiC interface was found to enhance dielectric loss and suppress reflection, resulting in excellent EMI shielding effectiveness. The material also exhibits high flexibility and long-term stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Xiaoxuan Wang, Pu Chen, He Yang, Jiawei Liu, Rong Tu, Hai-Tao Feng, Honglian Dai
Summary: The research team successfully synthesized an aggregation-induced emission-active luminogen (AIEgen) named 4BC with efficient reactive oxygen species (ROS) generation and loaded it into 3D bioactive scaffolds. Good in situ imaging performance for the implanted scaffolds was achieved through simple UV light irradiation. Among them, the 4BC@TMP scaffold composed of trimagnesium phosphate (TMP) showed excellent bactericidal ability for Escherichia coli and Staphylococcus aureus in vitro and resisted bacterial inflammation in vivo through photodynamic action. This study confirms the potential of AIEgen-based 3D scaffolds for bioimaging and antibacterial applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Yanan Zhao, Liangcong Hu, Honglian Dai, Pengzhen Zhuang, Kai Huang, Wen Hou, Jiawei Liu, Rong Tu, Takashi Goto
Summary: Infected bone defect has become a serious complication in orthopedic surgery due to bacterial biofilm formation. In this study, drug-loaded hollow mesoporous ferrite nanoparticles were prepared and incorporated into calcium magnesium phosphate cement, forming a Trap-Capture-Kill system to efficiently kill bacteria and inhibit biofilm formation. Under an alternating magnetic field, the composites exhibited acute magnetic hyperthermal capacity and recruited free bacteria. The permeability of bacterial cell membrane was increased by reactive oxygen species damage, allowing the drugs encapsulated in the nanoparticles to penetrate. The bacteria were then efficiently killed through magnetothermal effect, ROS damage, and adsorption damage. Furthermore, the antibacterial system showed excellent pro-osteogenesis and pro-angiogenic capacity, promoting vascularized bone regeneration in vivo.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Song Zhang, Jinrong Hu, Tianyu Zhu, Jian Peng, Rong Tu, Chuanbin Wang, Lianmeng Zhang
Summary: In this study, the chemical vapor deposition of 2D NbC on the Cu(1 1 1) substrate was investigated using first-principles calculations. The nucleation sites of Nb, C atoms, and NbCy (y = 1, 2, 3) clusters on the Cu(1 1 1) surface were determined, as well as the dominant precursor during the initial growth of NbC. The growth kinetics and epitaxial growth mechanism of a 2D NbC(1 1 1) single crystal on Cu(1 1 1) were elucidated.
APPLIED SURFACE SCIENCE
(2023)
Article
Fisheries
Felix Gyawu Addo, Songhe Zhang, Benjamin Manirakiza, Yu Ma, Shudong Yuan, Salah Alden Alklaf, Shaozhuang Guo, Godwin Abakari
Summary: In this study, a 30-day culture trial was conducted to investigate the effects of brown sugar addition on nutrient removal, feed conversion ratio, growth performance, and microbial community in a rice straw-based biofloc shrimp system. The results showed that the addition of brown sugar significantly reduced ammonium and nitrite nitrogen concentrations and improved nutrient removal rates. Furthermore, the addition of brown sugar also resulted in lower feed conversion ratio and higher shrimp survival rates. The dominant microbial phyla identified in all treatments played a crucial role in nutrient cycling and promoting water quality.
Article
Environmental Sciences
Xin He, Songhe Zhang, Xin Lv, Min Liu, Yu Ma, Shaozhuang Guo
Summary: This study investigated the role of rhizospheric biofilms on methane release in wastewater stabilization ponds (WSPs) with floating plants. The results showed that E. crassipes effectively reduced methane release and nutrients, with a higher inhibition effect on CH4 fluxes in treatments with high nutrients. Additionally, the rhizospheric bacterial community contributed to nutrients removal. In conclusion, E. crassipes plants play an important role in reducing methane release and nutrients removal.
Article
Environmental Sciences
Liu Yang, Songhe Zhang, Xin Lv, Yuansi Liu, Shaozhuang Guo, Xiuren Hu, Benjamin Manirakiza
Summary: This study investigated the impacts of Vallis-neria natans senescence on methanotroph community and methane release in wetlands. The results showed that nutrient loadings increased methane fluxes, while healthy V. natans plants reduced methane flux. Environmental parameters and the physiological status of V. natans affected methanotrophs.
ENVIRONMENTAL RESEARCH
(2023)
Article
Materials Science, Coatings & Films
Qizhong Li, Tao Huang, Mai Yang, Tenghua Gao, Baifeng Ji, Song Zhang, Lianmeng Zhang, Rong Tu
Summary: Hard coatings with gradient and multilayer structures were prepared by high-power pulsed magnetron sputtering. The modulation period was found to significantly affect the microstructure, mechanical, and tribological properties of the coatings. Shorter modulation periods improved the adhesion strength and resulted in higher hardness and lower friction coefficients.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Genetics & Heredity
Jiamin Jin, Peipei Ren, Xiang Li, Yinyi Zhang, Weijie Yang, Yerong Ma, Mengru Lai, Chao Yu, Songying Zhang, Yin-Li Zhang
Summary: Histone deacetylation is observed in granulosa cells during the process of ovulation, which is mediated by FSH and hCG. This process is regulated by CK2 alpha-mediated HDAC2 phosphorylation and is essential for successful ovulation.
EPIGENETICS & CHROMATIN
(2023)
Article
Obstetrics & Gynecology
Yichao Tian, Jin Huang, Chi-Chiu Wang, Huizhen Lin, Xiaona Huang, Yue Zhao, Liu Liu, Songying Zhang
Summary: The value of endometrial scratch in women with recurrent embryo transfer is controversial, and it is unclear if endometrial scratch in the previous mid-luteal phase affects the whole genome transcriptomic profile of peri-implantation endometrium in the subsequent cycle.
Article
Chemistry, Physical
Song Zhang, Wei Liu, Weimin Wang, Ying Gao, Aiyang Wang, Qianglong He, Wenhui Bai, Runfeng Li
Summary: This article uses a thermal-electric-mechanical coupled model to simulate the spark plasma sintering process of boron carbide, and conducts parameter optimization and simulation analysis.
Article
Materials Science, Multidisciplinary
Rong Tu, Jiao Jiao, Mingquan Jiang, Mai Yang, Baifeng Ji, Tenghua Gao, Qizhong Li, Song Zhang, Lianmeng Zhang
Summary: Hard coatings, such as transition metal nitrides, are widely used to improve the mechanical properties and tribological performance of cutting tools. This study deposited TiN/TiSiN coatings with various gradient and multilayer structures on cemented carbides, using cathodic arc ion plating. The coatings exhibited excellent hardness, compressive stress, coefficient of friction, and wear rate, with the modulation period playing a crucial role in determining their properties. Gradient and multilayer structures effectively mitigated the brittleness caused by the amorphous SiNx phase and optimized the coatings' performance.
Article
Materials Science, Ceramics
Kai Liu, Lei Qiu, Yuzhen Zhang, Yanying Du, Ce Sun, Song Zhang, Rong Tu, Yanjiao Wu, Huajun Sun, Yusheng Shi
Summary: A material extrusion (MEX) technology was developed for additive manufacturing of continuous carbon fiber-reinforced silicon carbide ceramic (C-f/SiC) composites. A slurry with high solid loading and viscosity was proposed based on rheological properties. Complex structures of C-f/SiC composites were printed using this MEX technique. Phenolic resin impregnation-carbonization process and reactive melting infiltration (RMI) were used to prepare samples with different C-f contents, with the highest bending strength and fracture toughness achieved at 1 K C-f content.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Shunqin Zeng, Xiaoli Ding, Liqing He, Hai-Wen Li, Qingan Zhang, Yongtao Li
Summary: Dual lithium-containing hydride/oxide shells are formed by in situ mechano-induced assembly of Li3PO4 and LiBH4. The ionic conductivity of the Li3PO4-based composite is significantly improved by nearly 4 orders of magnitude, reaching 0.04 mS cm(-2) at 75°C, with an electrochemical window of -0.2-5 V (vs. Li/Li+).
MATERIALS ADVANCES
(2023)
