Article
Materials Science, Multidisciplinary
Guang Zhu, Shasha Zou, Rimei Yao, Zhen Ma, Yuan Zhang, Xiaobing Zhao, Guocheng Wang
Summary: A new method of nanotopography modulation using plasma flame generated by plasma spraying equipment was proposed in this study. It was found that the method can improve the biocompatibility and osseointegration of titanium alloy implants.
Article
Biotechnology & Applied Microbiology
Jiantao Liu, Kao Wang, Xingyuan Li, Xiwei Zhang, Xi Gong, Yihan Zhu, Zhiwei Ren, Bin Zhang, Jun Cheng
Summary: Ti6Al4V titanium alloy used for orthopedic and maxillofacial implants has drawbacks such as high elastic modulus, poor osseointegration performance, and toxic elements. This study developed a new medical titanium alloy material, Ti-B12, with better comprehensive performance and further studied its biocompatibility and osseointegration properties.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Automation & Control Systems
Zhuang Shao, Yumei Wen, Zhuangzhuang Xu, Leixiang Bian, Ping Li, Guangjun Wen, Zhenbing Li, Gang Li, Yao Wang, Tao Han, Xiaojun Ji
Summary: This article proposes a wireless current detection system that utilizes the ambient magnetic field to detect cable current, avoiding the constraints of wired connections and batteries, and providing an extendable measurement range.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Yuxin Wang, Jiahuan Chen, Yifan Yang, Zihan Liu, Hao Wang, Zhen He
Summary: This study develops nanostructured superhydrophobic titanium-based materials using a combined preparation method of laser marking and anodizing. The results show that the proposed method can enhance the corrosion resistance and mechanical stability of the surface's superhydrophobicity.
Article
Computer Science, Information Systems
Zhuang Shao, Yumei Wen, Ping Li, Guoda Wang, Yao Wang, Tao Han, Xiaojun Ji
Summary: RF sensing tags are essential for the Internet of Things, but their functionality can be affected by the mutual influence between adjacent tags. Analyzing the mutual impedance between tags provides insights into the wireless links between them. Experiments validate the impact of antenna separation on data decoding and transmission.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Biophysics
Xiaotong Zhao, Jiali Hu, Jingjun Nie, Dafu Chen, Gaowu Qin, Erlin Zhang
Summary: In this study, a TiCuNxOy coating with an immunomodulatory strategy was proposed for the first time, which stimulated macrophage activation and promoted the M1-to-M2 transition, leading to accelerated inflammation response and tissue healing. Additionally, the coating demonstrated long-term antibacterial activity and facilitated HUVEC growth. These findings offer new insights into the creation of surface coatings with immunomodulatory effects and long-term bactericidal potential for cardiovascular applications.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Stephen Henthorn, Timothy O'Farrell, Mohammad Reza Anbiyaei, Kenneth Lee Ford
Summary: Direct RF sampling receivers are explored for concurrent multiband reception in mobile broadband applications. The research examines the use of direct RF digitization to enable tunable and concurrent reception of multiple bands with a single RF front-end. Mathematical models of Nyquist and subband sampling receivers are presented, and a quadband LTE receiver is simulated and implemented in a hardware-in-the-loop testbed. The desensitization of receivers due to multiband processing is evaluated, showing a maximum of 3dB degradation within LTE standard requirements for adjacent band interference.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2023)
Article
Computer Science, Information Systems
Joseph Finnegan, Kyriaki Niotaki, Stephen Brown
Summary: This study extends previous research on powering LoRaWAN sensors with high-energy ambient or wireless transfer power sources by exploring the boundaries of using low-energy RF ambient sources. It identifies the feasibility boundaries for powering LoRaWAN sensor nodes from ambient RF energy, highlighting design and environmental factors.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Engineering, Aerospace
Yueh-Heng Li, Yi-Chien Chen, Sheng-Wen Liu, Alim Ruestem Aslan
Summary: Ion thrusters are widely used in the space industry due to their high efficiency, high specific impulse, and long lifetime. The thrust performance of a radio-frequency (RF) ion thruster depends not only on the RF power but also on other critical parameters such as propellant flow rate, ion grids voltages, and RF input power. A surrogate model, the Kriging model, is used to simplify the estimation and optimization of thrust performance. Based on Kriging model simulations, the designed RF ion thruster can achieve a thrust of 1.9 mN, a specific impulse of 1649.5 s, and a thrust efficiency of 48% under specific operating conditions.
Article
Materials Science, Multidisciplinary
Pradeep Singh, Vikas Shrivastava, I. B. Singh, D. P. Mondal
Summary: The research on three groups of porous Ti4Al4Co samples revealed significant microstructural transformations due to powder milling and different sintering atmospheres, which in turn affected the mechanical and corrosion properties of the alloy. Sample S-1 showed the highest compressive strength and lowest corrosion current density among the three samples.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Plant Sciences
Nam Trung Tran, Luca Jokic, Julian Keller, Jens Uwe Geier, Ralf Kaldenhoff
Summary: The increased use of wireless technology leads to significant exposure of all living organisms to radio frequency electromagnetic fields (RF-EMF). This study investigated the effects of RF-EMF radiation on lettuce plants in indoor and outdoor environments using different frequency ranges. Results showed that RF-EMF exposure had minimal impact on lettuce plants in greenhouse conditions, but it significantly decreased photosynthetic efficiency and accelerated flowering time in plants exposed to RF-EMF in the field. Gene expression analysis revealed down-regulation of stress-related genes in RF-EMF-exposed plants, indicating potential interference with plant stress responses.
Article
Materials Science, Ceramics
Qi Cai, Jun Xie, Kai Xu, Guanglei Wang, Jianjun Han, Hong Jiang, Song Zhang
Summary: The study focused on the volatilization and size distribution of ISG spherical particles prepared by Ar-H-2 radio-frequency plasma. Results showed that high spheroidization rate and lower volatilization of B2O3 and Na2O were achieved under low flow rate of carry gas and low feed rate. EPMA analysis revealed a nearly homogeneous distribution of elements on particle surfaces, providing potential for future research.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Liam W. Bussey, Amelia Winterburn, Marco Menchetti, Fraser Burton, Tim Whitley
Summary: The study demonstrates the use of atomic vapor and Electromagnetically Induced Transparency effect to create an all-optical high sensitivity Radio Frequency sensor. By utilizing simple planning rules and an analytic model, the research focuses on maximizing the contrast in optical response to a modulated RF signal rather than a constant RF field.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Rajesh T. Keshwani, Siddhartha Mukhopadhyay, Ravindra D. Gudi, Gopal Joshi
Summary: This article focuses on estimating the detuning value ?? of an RF cavity using various approaches. Each approach has its advantages and limitations. The performance of the Kalman filter algorithm is evaluated using a 650 MHz RF cavity in the experiment. The adaptive Kalman filter (AKF) helps to assess the values of tuning parameters.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Chemistry, Applied
Athos F. Araujo, Marcos V. F. Ferreira, Marcos D. Felisberto, Dalila C. Sicupira, Leandro A. Santos
Summary: The mechanical responses and corrosion protection capacity of two graphene-based coatings on a NiTi alloy were evaluated under superelastic loading cycles. Both GO and rGO + SEBS coatings demonstrated the ability to form uniform coatings and withstand multiple superelastic cycles, with the rGO + SEBS coating showing significant improvement in terms of corrosion resistance.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Physics, Applied
P. D. G. Maqueo, S. Coulombe, J. M. Bergthorson
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2019)
Article
Engineering, Chemical
Elena Corella Puertas, Adna Dzafic, Sylvain Coulombe
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2020)
Review
Engineering, Chemical
Jennifer Martin-del-Campo, Sylvain Coulombe, Jan Kopyscinski
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2020)
Article
Thermodynamics
Julien Lambert, Sylvain Coulombe, Gilles Bourque, Jeffrey M. Bergthorson
Summary: There has been an increased interest in plasma-assisted combustion due to its ability to improve flame stability and combustion performance over the past two decades. This study investigates the hydrodynamic effect of nanosecond repetitively pulsed discharges on a lean premixed methane-air flame at atmospheric pressure, finding that the plasma pulse repetition frequency impacts flame stability and upstream movement. The plasma reduces flow velocity upstream of the flame front and induces stretch in the flame, resulting in an increase in flame speed.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Nanoscience & Nanotechnology
Adya Karthikeyan, Evelyne Kasparek, Anne-Marie Kietzig, Pierre-Luc Girard-Lauriault, Sylvain Coulombe
Summary: This study presents a novel method for fabricating Janus-type MWCNT-covered SS mesh with dual-wetting properties even after exposure to water for 540 days. The top face of the mesh is coated with a plasma polymer rich in nitrogen-containing functional groups, while the bottom face has vertically aligned MWCNTs, contributing to its superhydrophobic nature.
Article
Chemistry, Multidisciplinary
Jennifer Martin-del-Campo, Marianna Uceda, Sylvain Coulombe, Jan Kopyscinski
Summary: The combination of rotating gliding arc and a spouted catalytic bed in a plasma-catalytic system for dry reforming of methane showed more stable operation using Al2O3-supported catalysts compared to SiO2. Using a catalytic bed in the plasma zone significantly increased selectivity towards CO and H2, reducing acetylene production in the process. The presence of a catalyst also greatly reduced the formation of soot and coke in the reactor, indicating potential for improving catalytic performance during DRM reactions.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Physics, Applied
Elmira Pajootan, Minnan Ye, Muyang Zhang, Sogol Niroumandrad, Sasha Omanovic, Sylvain Coulombe
Summary: In this study, multi-walled carbon nanotubes (MWCNTs) directly grown on a stainless steel mesh were functionalized using a fast, solvent-free radiofrequency (RF) plasma technique. The functionalized MWCNT electrodes showed improved capacitive behavior, particularly the MWCNT electrode functionalized with the RF plasma employing the Ar/C2H6/O-2 gas mixture at 20 W for 15 min, which achieved the highest capacitance.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Elmira Pajootan, Sylvain Coulombe, Sasha Omanovic
Summary: 3D porous electrocatalysts with low platinum loading were synthesized using gas-phase pulsed laser ablation, showing higher methanol oxidation current and lower loss of active sites compared to commercial Pt/C. Increasing the electrolyte temperature significantly improved the efficiency of the electrocatalysts.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Hanie Kazari, Elmira Pajootan, Pascal Hubert, Sylvain Coulombe
Summary: This study successfully deposited ruthenium nitride on a stainless-steel mesh substrate using a novel dry fabrication method. The method eliminates toxic byproducts and the need for binders, making it ideal for flexible supercapacitor electrodes. Experimental results showed a significant improvement in capacitance of the synthesized ruthenium nitride-multiwalled carbon nanotube electrode, with a large potential window.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Elmira Pajootan, Sammie Amin Alolabi, Sasha Omanovic, Sylvain Coulombe
Summary: This study presents the fabrication and characterization of novel multilayered electrocatalyst nanostructures for the oxygen reduction reaction (ORR). Thin titanium oxynitride (TiOxNy) coatings are deposited on multi-walled carbon nanotubes (MWCNTs) grown on a stainless-steel mesh, followed by coating with dispersed Pt nanoparticles (NPs). The resulting electrodes show high activity in the ORR, with Pt/TiOxNy-0.03 Torr-30 W/MWCNT exhibiting the best performance.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Physics, Fluids & Plasmas
Julien Bissonnette-Dulude, Sylvain Coulombe, Thomas Gervais, Stephan Reuter
Summary: In this study, a prototype device that combines microfluidics with plasma technology is proposed for the study of plasma-liquid interactions. The transport of reactive species generated by plasma in the liquid is investigated using colorimetric analysis of hydrogen peroxide concentration. The results show that this plasma-microfluidic prototype has great potential for fundamental research in plasma-liquid interactions, and opens the way for future combinations of plasma devices with standard microfluidic devices.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Steven Walker, Gareth Price, Elmira Pajootan, Sylvain Coulombe
Summary: Nonthermal plasma-catalytic processes are being explored as an alternative to the energy-intensive Haber-Bosch process for ammonia synthesis, with a focus on achieving a more environmentally friendly and efficient production. Nanocatalysts, plasma excitation, and gas mixing are key components, with reaction kinetics serving as the coupling factor.
2021 IEEE 16TH NANOTECHNOLOGY MATERIALS AND DEVICES CONFERENCE (NMDC 2021)
(2021)
Article
Nanoscience & Nanotechnology
Robyn Iannitto, Homin Shin, Yadienka Martinez Rubi, Benoit Simard, Sylvain Coulombe
ACS APPLIED NANO MATERIALS
(2020)
Article
Engineering, Chemical
Irshad Ali, Nehar Ullah, Mark A. McArthur, Sylvain Coulombe, Sasha Omanovic
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2018)
Article
Engineering, Chemical
Mark A. McArthur, Nehar Ullah, Sylvain Coulombe, Sasha Omanovic
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2018)
Article
Materials Science, Coatings & Films
Yanchun Xie, Xiaodong Wang, Shenshen Cui, Jiali Hu, Yongcun Wei, Yi Lian, Anwu Xuan, Bin Yu, Erlin Zhang
Summary: In this study, Ti-xFe (x = 3,5,9 wt%) alloys were surface modified by micro-arc oxidation (MAO) to improve their antimicrobial properties and biocompatibility. The results showed that increasing the oxidation voltage greatly enhanced the roughness and hydrophilicity of Ti-xFe-MAO alloys. The Ti-xFe alloys micro-arc oxidized at 250 V and 300 V exhibited improved corrosion resistance and excellent antimicrobial and cytocompatibility properties, making them suitable for orthopedic implant materials.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuting Hao, Zuoyan Ye, Lili Wang, Minheng Ye, Hui Dong, Chao Wang, Yunchen Du
Summary: This study focuses on the modification of PEO coatings on Ta-12W alloy using NH4F additive. The results show that ultra-low porosity coatings can be prepared by optimizing the NH4F content. The formation process of specific structures on the coating surface is discussed, and the effects of NH4F concentration and treatment duration on coating characteristics are investigated.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuanzhuo Liu, Linjiang Chai, Tao Yang, Chaodan Hu, Chuanmei Wang, Guoqiang Xi
Summary: By employing a pulsed laser, laser cladding was performed on IN718 alloy pre-coated with CrCoNi-TiC/SiC powders and three defect-free coatings were successfully prepared. The addition of TiC and SiC powders generated fine carbides dispersed in the coatings and led to changes in grain and substructure morphologies, resulting in increased hardness and wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
M. Ghaemi, A. Lopez-Cazalilla, K. Sarakinos, G. J. Rosaz, C. P. A. Carlos, S. Leith, S. Calatroni, M. Himmerlich, F. Djurabekova
Summary: The use of high-power impulse magnetron sputtering can result in dense and uniform niobium films on all surfaces of superconducting rf cavities, as simulated and investigated in this study.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Jiaheng Du, Xinli Fan, Dongqin Xiao, Wuxiang Wang, Yiran Yin, Zhong Li, Kui He, Yanfei Tan, Jiyuan Yan, Gangli Liu, Ke Duan
Summary: This study investigated the electrophoretic deposition (EPD) of magnesium oxide (MgO) coatings on micro-arc oxidized titanium (MAO-Ti) and evaluated their in vitro antibacterial properties and biocompatibility. The results showed that MgO coatings significantly reduced bacterial numbers and biofilm formation, while also demonstrating good cytocompatibility and induction of osteoblast mineralization.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Samiksha Moharana, Yuichi Otsuka, R. Gnanamoorthy
Summary: The addition of titania to HAp coatings improves their wear resistance and reduces damage to titanium implants caused by debris generation. This study evaluates the fretting wear resistance of titania-added HAp suspension plasma spray coating and finds that it exhibits reduced friction coefficient and increased wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Li-Ping Wu
Summary: The functional hazenite coating deposited on AZ31 Mg alloy showed improved roughness and hydrophilicity, enhanced biocompatibility, reduced degradation rate, and decreased susceptibility to stress corrosion cracking.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Ning Tian, Delei Xu, Jinfei Wei, Bucheng Li, Junping Zhang
Summary: This study reports the preparation of a superhydrophobic and anti-bacterial fabric for face masks. The fabric exhibits high superhydrophobicity and excellent moisture resistance, enabling functionality effectiveness in cold weather conditions. The fabric also demonstrates remarkable anti-bacterial activity against E. coli, attributed to the synergistic effect of superhydrophobicity and embedded ZnO nanoparticles. This superhydrophobic anti-bacterial fabric holds great potential for various practical applications in personal protective equipment, healthcare, and disease prevention.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Katharina Beck, Anke S. Ulrich, Andreas K. Czerny, Emma M. H. White, Martin Heilmaier, Mathias C. Galetz
Summary: Refractory metal based alloys have great potential as structural materials for high-temperature applications due to their high melting points. However, they are prone to catastrophic oxidation at around 700 degrees C. This study investigated the effect of aluminium diffusion coatings on the oxidation resistance of pure molybdenum, niobium, tantalum, and tungsten. The results showed that the aluminization improved the oxidation behavior and decreased the oxide growth rate for molybdenum and tantalum.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Wenwen Shuai, Haijun Dou, Zhichen Guan, Wei Qian, Zhibao Li, Yinqun Hua, Jie Cai
Summary: This study synthesized (Y1-xLax)3Al5O12 (x = 0, 0.1, 0.2, 0.3) materials by doping lanthanum ions, and found that the doped materials exhibited improved mechanical properties and thermal expansion coefficient, as well as enhanced resistance to CMAS corrosion. These materials have potential applications.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Xianglei Liu, Jiahui Ding, Wanbo Hou, Xinhao Shi, Tao Feng, Xiangyuan Meng, Shifeng Wen, Mingde Tong, Zhufeng Yue
Summary: A composite coating was developed to improve the adhesion, wear resistance, and corrosion resistance, which exhibited significant enhancements in these properties.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hongxuan Xing, Jidong Li, Xianwei Hu, Liang Tian, Renyun Zhang, Yiyong Wang
Summary: By depositing a Cu/Co-Mo corrosion-resistant plating layer on the surface of 6061 Al alloy, the bonding strength between the alloy and the plating layer can be improved and the corrosion resistance can be enhanced. The composite coating forms an obvious three-layer structure with Co-Mo coating exhibiting amorphous characteristics and Co3Mo phase composition. The composite coating improves the corrosion resistance and hardness of the substrate, effectively protecting the 6061 Al alloy.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Fan Yang, Debin Wang, Tianrun Li, Baijun Yang, Suode Zhang, Jianqiang Wang
Summary: The impact-corrosion behavior of monolayer and hierarchical Fe-based amorphous coatings fabricated by HVAF was investigated in 3.5 wt% NaCl solution. The monolayer coating exhibits corrosion failure with increased impact energy, while the hierarchical coating shows improved resistance. However, at high impact energies, both coatings experience corrosion degradation.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Shoaib Ahmad, Muddasir Nawaz, Solaiman Mohammad, R. A. Shakoor, Ramazan Kahraman, Talal Mohammed Al Tahtamouni
Summary: This research presents a novel self-healing anti-corrosion composite coating that demonstrates higher inhibition efficiency and self-healing effect, providing protection for metallic structures against corrosive environments.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hui-Wen Peng, Chun-Hway Hsueh
Summary: A series of (CoCrNi)100-x-ySixNdy medium entropy alloy films with manipulated metalloid element, Si, and rare earth element, Nd, were synthesized using magnetron three-target co-sputtering. The films showed different structures and mechanical properties with varying Si and Nd contents. The optimized mechanical properties were observed in the film with Si0.61Nd5.14, attributed to precipitation strengthening and grain refinement.
SURFACE & COATINGS TECHNOLOGY
(2024)
