Article
Materials Science, Ceramics
Oguzhan Bilac, Cihangir Duran
Summary: Mullite/glass/nano aluminum nitride (AlN) composites containing 1-10 wt% AlN filler were successfully fabricated for low-temperature co-fired ceramics applications. The composites exhibited densification temperatures below 825 degrees C due to the viscous sintering of the glass matrix. The addition of AlN increased the number of closed pores, limiting the expected property improvement.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Engineering, Electrical & Electronic
E. K. Suresh, T. S. Akhil Raman, A. Othman, B. Arun, J. Andrews, K. C. James Raju
Summary: Temperature stable (1-x)BaV2O6-xBaZnV(2)O(7) (x = 0.35-0.55) composite ceramics with excellent microwave dielectric properties were prepared by solid state ceramic route. The structural features, microstructure, and elemental analyses of the ceramics were studied using various techniques. The composite with x = 0.5 showed a relative density above 96% and a near zero temperature coefficient of resonant frequency, making it suitable for low temperature co-fired ceramic applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Ceramics
Premysl Stastny, Jana Smieskova, Martin Trunec
Summary: This study describes a method for the production of multilayer tapes using the aqueous epoxy-based gel-tape co-casting of ceramic suspensions. It demonstrates the applicability of this method for the preparation of high-quality fine powder ceramic stacks.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Lan Zhang, Shuquan Yang, Meihui Xiao, Lin Chen, Jun Sun, Jianjun Ding, Xiaoxiao Li, Yi Gong, Kang Zheng, Xian Zhang, Xingyou Tian
Summary: In this study, the performance of a low-temperature sintered Bi-B-Si-Zn-Al glass/Al2O3/SiC nanowires composite fabricated by the tape casting method was investigated. The addition of 0.5 wt% SiC nanowires increased the thermal conductivity of the composite, and it also exhibited low thermal expansion and high dielectric constant.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
S. A. N. Franca Junior, A. L. R. Souza, L. B. Cruz, F. Vaz, A. Ferreira, F. Bohn, W. Acchar, M. A. Correa
Summary: This paper explores the use of tape casting technique to produce flexible heterostructured multilayers with doping of graphene nanoplatelets and nickel oxide-gadolinium doped alumina, and investigates their dielectric properties. The study reveals a strong dependence of dielectric behavior on the multilayer structure and graphene nanoplatelets doping concentration in alumina, showing potential for multifunctional flexible ceramics tapes in high-frequency applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
S. A. N. Franca Junior, W. Acchar, S. L. A. Dantas, P. H. Chiberio, H. P. A. Alves, M. R. D. Bomio, F. V. Motta, F. Bohn, A. Ferreira, F. Vaz, M. A. Correa
Summary: We conducted a comprehensive investigation on the high-frequency dielectric properties of (ZrO2)100-x(BaTiO3)x heterostructures. By adjusting the content of BaTiO3, we could modify the dielectric constant of the resulting ceramic sheets. Our results demonstrated successful fabrication of heterostructured ceramic sheets and the ability to tailor the electric, structural, and dielectric properties of both ZrO2 and BaTiO3 materials. Furthermore, the evolution of the dielectric constant could be manipulated according to specific technological applications.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Fan Yang, Youhong Tan, Ye Yuan, Jin Li, Caixia Zhang, Yangfu Liu, Jianxi Tong, Fancheng Meng
Summary: The Li2O-MgO-ZnO-B2O3-SiO2 (LMZBS) ceramic with low sintering temperatures was prepared via traditional solid-state method, and the Mg2SiO4/LMZBS ceramic composite was found to have improved properties upon addition of Mg2SiO4. The 20 wt% Mg2SiO4 ceramic sintered at 900 degrees C showed superior performance, making the Mg2SiO4/LMZBS ceramic composite a great candidate in low-temperature co-fired ceramics technology.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Fuyu Li, Yuanxun Li, Yang Luo, Jinping Zhang, Yongcheng Lu, Rui Peng, Tingting Tang, Qiye Wen
Summary: This article reports a novel Zn0.96Cu0.oMoO4 ceramic and its application in microwave imaging devices. The substitution behavior and microwave dielectric properties of the ceramic are systematically studied. The ceramic exhibits excellent microwave dielectric properties when sintered at 825 degrees C. A 40 x 40 microstructure array for static microwave imaging is designed based on this ceramic substrate. This work opens up the application of microwave dielectric ceramics in the imaging field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Xiaopin Hu, Teng Cao, Boquan Wang, Zhiyi Wen, Kang Yan, Dawei Wu
Summary: In this study, a low-cost multilayer piezoelectric ceramic actuator (MLA) was prepared using a modified piezoelectric ceramic powder and Ag inner electrode, with a low sintering temperature of 900 degrees C. The MLA exhibited superior piezoelectric properties and a large electric-field-induced strain. Furthermore, the ultrasonic motor composed of this MLA showed ideal vibration mode and achieved a high maximum rotation speed under a load, demonstrating the applicability of this component in practical minimised devices. These findings provide a strategy for fabricating low-cost and high-precision micro-actuators for precision driving.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Zheng Sun, Xiaosong Lvu, Weijia Luo, Jingda Guo, Qiuyue Wang, Jingru Hua
Summary: This study investigated the effects of BCu additive on the microstructure and microwave dielectric properties of ZZNT ceramics. The results showed that a small amount of BCu could significantly reduce the sintering temperature and form rutile-like and Zn0.17Nb0.33Ti0.5O2 secondary phases. The BCu-added ceramics also demonstrated excellent chemical compatibility with Ag electrode, making them suitable for LTCC applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yunfeng Guo, Zexing Wang, Jiamao Li
Summary: In this study, novel LTCC materials with good microwave dielectric properties were developed by adding LiF sintering aid to LTCN ceramics. By adjusting the doping amount and sintering conditions of LiF, the microstructure and microwave dielectric properties of the ceramics were improved, making them potential materials for LTCC applications.
Article
Engineering, Environmental
Fuyu Li, Yuanxun Li, Sheng Li, Yang Luo, Yongcheng Lu, Tingting Tang, Yulong Liao, Jinping Zhang, Qiye Wen
Summary: To address the problem of 5G signal attenuation, a novel Zn0.97Co0.03Mo0.92W0.08O4 ceramic material with excellent microwave dielectric properties was developed. An all-ceramic array patch was designed and demonstrated for 5G signal enhancement, effectively avoiding matching co-fire issues and compensating for signal loss in walls. The device improved the intensity of the 5G signal from 0.02 to 1.62 through the focusing effect.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Ceramics
Xianfu Luo, Yilong Ma, Bin Shao, Chunhong Li, Kejian Li, Donglin Guo, Dengming Chen
Summary: This study reports on the development of an eco-friendly aqueous tape casting slurry for the production of borosilicate glass/Al2O3 tapes. Different additives were used to improve the dispersion and quality of the tapes, and the resulting composites exhibited promising properties for LTCC applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Hugo P. A. Alves, Rubens Alves Junior, Bruno R. Carvalho, Marcio A. Correa, Wilson Acchar
Summary: This research focuses on the production of zirconia-magnetic particles and zirconia-graphene composites, with a detailed study of their structural and magnetic properties. The study confirms the efficiency of the applied method and reveals that the insertion of graphene in zirconia ceramic composite is responsible for the ferromagnetic behavior of the sintered composite. Ceramic composites have potential future applications in spintronic devices and magnetic storage.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Weihuan Tang, Yuanxun Li, Sheng Li, Tingting Tang, Mingshan Qu, Jie Li, Fuyu Li
Summary: To improve the performance of polarization converters, microwave dielectric properties of Ca5Mn4(VO4)(6) ceramics are improved by substituting Cu2+ for Mn2+. The substituted ceramics exhibit excellent microwave dielectric properties with ε(r) = 11.4, Q x f = 42709 GHz, and τ(f) = -65 ppm/°C. This ceramic substrate is used to design a new 5G polarization converter, which demonstrates good performance in converting between linear polarization and left-handed circularly polarized waves.
JOURNAL OF MATERIALS SCIENCE
(2023)
Review
Environmental Sciences
Md Anwarul Islam, Mohan V. Jacob, Elsa Antunes
Summary: Silver nanoparticles are widely used in various products due to their exceptional antimicrobial properties and surface plasmon resonance. However, the environmental pollution caused by the release of silver nanoparticles is becoming increasingly serious, especially affecting aquatic ecosystems. It is crucial to reduce the toxic effects of silver nanoparticles and adhere to regulatory guidelines in order to protect the environment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Biochemistry & Molecular Biology
Daniel S. Grant, Jakaria Ahmed, Jason D. Whittle, Andrew Michelmore, Krasimir Vasilev, Kateryna Bazaka, Mohan V. Jacob
Summary: The study revealed a decrease in disparities between the type and abundance of cationic species formed in the plasma environments of terpinen-4-ol and Melaleuca alternifolia oil as plasma power was increased. Additionally, both terpinen-4-ol and M. alternifolia derived coatings showed antibacterial action against S. aureus bacteria and demonstrated good cytocompatibility with eukaryotic cells.
Article
Nanoscience & Nanotechnology
Muhammad Adeel Zafar, Oomman K. Varghese, Francisco C. Robles Hernandez, Yang Liu, Mohan Jacob
Summary: This work demonstrated a single-step, single-precursor synthesis method for nitrogen-doped graphene oxide (N-GO). By using aniline as the sole carbon and nitrogen source, N-GO films were synthesized using microwave plasma at a low power of 80 W under atmospheric conditions. The synthesized N-GO films showed a lower interplanar spacing compared to GO films, indicating a lower concentration of oxygen and other species between the N-GO layers. The as-fabricated N-GO exhibited superior antiscaling and algicidal properties, which are important for water purification applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Michael S. A. Kamel, Michael Oelgemoller, Mohan Jacob
Summary: This study presents a method of synthesizing ultrathin encapsulation materials for organic photovoltaics (OPVs) using plant extract. The encapsulated device showed improved stability and retained a significant portion of its initial power conversion efficiency and fill factor after 90 days under ambient conditions. The open circuit voltage remained unchanged after more than 4.5 months.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Physics, Applied
Jesus Romo-Rico, Smriti Murali Krishna, Jonathan Golledge, Andrew Hayles, Krasimir Vasilev, Mohan Jacob
Summary: Bacterial infection of chronic wounds is a significant healthcare problem that affects patients' quality of life and healthcare costs. This study developed a potential wound healing agent with desirable surface properties, biocompatibility, and antibacterial properties.
PLASMA PROCESSES AND POLYMERS
(2022)
Article
Chemistry, Physical
Michael S. A. Kamel, Craig Thomas Stoppiello, Mohan V. Jacob
Summary: Graphene, with its outstanding optical and electrical properties, holds great promise as a transparent conducting electrode for organic photovoltaics (OPVs). However, the high cost and complexity of graphene synthesis, as well as the use of hazardous carbon sources, have limited its large-scale application. This research presents a single-step synthesis of graphene TCEs on glass substrates for OPVs using plant extract and Radio frequency plasma enhanced chemical vapor deposition. The synthesized graphene films display high quality structure and demonstrate promising optical and electrical properties. In inverted OPV devices, the graphene TCEs achieved 80% power conversion efficiency compared to indium tin oxide counterparts, along with higher short circuit current density and open circuit voltage.
Review
Environmental Sciences
Scarlett Allende, Graham Brodie, Mohan V. Jacob
Summary: The agricultural industry faces an increase in waste generation due to population growth, thus creating a demand for generating electricity and value-added products from renewable sources. This study explores the factors affecting the quality and yield of biochar, bio-oil, and biogas during the microwave pyrolysis process, considering biomass nature and various operating conditions. Factors such as the content of lignin, cellulose, and hemicellulose in the biomass affect the yield of biochar, bio-oil, and biogas. The conditions of the pyrolysis system, such as input power, microwave heating suspector, vacuum, reaction temperature, and the processing chamber geometry, also play a role in optimizing energy recovery.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
M. Adeel Zafar, Yang Liu, Francisco C. Robles Hernandez, Oomman K. Varghese, Mohan Jacob
Summary: Atmospheric pressure microwave plasma is used for the synthesis of graphene nanosheets using a sustainable precursor called tea tree. The process is performed in a single step at a low microwave power of 200 W. The graphene synthesized shows excellent sensing capability for detecting diuron herbicide, with a linear range of 20 μm to 1 mm and a limit of detection of 5 μm.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Physical
M. Adeel Zafar, Yang Liu, Scarlett Allende, Mohan V. Jacob
Summary: The present article describes a novel approach to the green and in-situ synthesis of graphene and silver nanoparticles nanocomposite using tea tree oil and silver nitrate vapours. The synthesis process occurs within seconds in microwave plasma at ambient conditions. The resulting nanocomposite exhibits strong interaction between Ag nanoparticles and graphene and demonstrates good electrochemical sensing capability for methyl paraben.
APPLIED SURFACE SCIENCE
(2023)
Article
Energy & Fuels
Scarlett Allende, Graham Brodie, Mohan V. Jacob
Summary: This research focuses on utilizing pumpkin peel for energy recovery through microwave pyrolysis. The study found that higher quality biochar and greater bio-oil generation could be achieved at 1.2 kW. Additionally, pumpkin peel has the potential for CO2 sequestration. These findings contribute to sustainable solutions for biomass conversion and emphasize the importance of utilizing food waste for energy production.
Article
Chemistry, Physical
Michael S. A. Kamel, Craig Thomas Stoppiello, Mohan V. Jacob
Summary: The hybridization of silver nanowires and chemical vapor deposition-based graphene is a promising strategy to produce efficient transparent conducting electrodes. This study successfully demonstrates the coupling of transfer-free graphene with AgNWs, resulting in a lower sheet resistance and increased interface area between the TCE and active layer. The resulting hybrid TCEs show comparable performance to reference devices in organic photovoltaics.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jesus Romo-Rico, Richard Bright, Smriti Murali Krishna, Krasimir Vasilev, Jonathan Golledge, Mohan V. Jacob
Summary: In this research, graphene (Gr) was deposited on a medical-grade cobalt-chromium (CoCr) alloy surface using Origanum vulgare as a precursor material. The biocompatibility and antibacterial properties of CoCr-Gr were investigated. The results suggest that CoCr-Gr could be a potential antibacterial coating material for implantable devices.
Article
Chemistry, Physical
Muhammad Adeel Zafar, Mohan Jacob
Summary: This study successfully synthesized free-standing graphene at a significantly lower microwave power (250 W), which was confirmed through Raman spectrum and scanning electron microscopy. The application of graphene in oil-water separation based on its hydrophobic and oleophilic properties was demonstrated.
APPLIED SURFACE SCIENCE ADVANCES
(2022)
Article
Materials Science, Multidisciplinary
Muhammad Adeel Zafar, Yang Liu, Scarlett Allende, Mohan V. Jacob
Summary: In this study, an electrochemical sensor for oxalic acid detection based on a nanocomposite of silver nanoparticles (Ag-Nps) and nitrogen-doped graphene oxide (N-GO) was demonstrated. The sensor exhibited a higher current response, good selectivity, and stability, which can be attributed to the synergistic effect of Ag-Nps and N-GO. The amperometric responses were proportional to the concentration of oxalic acid, with a detection limit of 2 μM.
Review
Chemistry, Multidisciplinary
Avishek Kumar, Ahmed AL-Jumaili, Olha Bazaka, Elena P. Ivanova, Igor Levchenko, Kateryna Bazaka, Mohan V. Jacob
Summary: This article discusses the challenges of marine biofouling in maritime industries, highlighting drawbacks of current biocide-based approaches. It also introduces strategies based on natural antifouling products and physio-chemical properties. Furthermore, it reviews environmentally friendly marine antifouling technologies based on advanced nanocomposites, synergistic effects, and biomimetic approaches, comparing their benefits and potential drawbacks to existing techniques.
MATERIALS HORIZONS
(2021)
