Article
Materials Science, Composites
Chenyang Xu, Erchun Li, Jinjue Zeng, Yue Wang, Tao Wang, Cong Ge, Chen Zhang, Qi Wang, Tian Gao, Yagang Yao, Xiangfen Jiang, Ya Zhang, Qian Cheng, Xue-Bin Wang
Summary: Plasma activations can effectively functionalize BN and change its hydrophobicity to hydrophilicity, achieving interfacial bonding between plasma-treated BN fillers and polyvinyl alcohol molecules. The BN/polyvinyl alcohol composite material shows a high through-plane thermal conductivity of 2.4 W m(-1) K-1 for a filling fraction of 50 wt% BN treated by N-2 plasma, offering a promising approach for the high-efficiency and low-cost fabrication of BN-based composite materials.
COMPOSITES COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Vidur Raj, Dipankar Chugh, Lachlan E. Black, M. M. Shehata, Li Li, Felipe Kremer, Daniel H. Macdonald, Hark Hoe Tan, Chennupati Jagadish
Summary: Research has shown that wafer-scale, few monolayers thick hBN as a passivation layer can significantly improve solar cell performance, with a relatively low interface defect density and potential for high-quality passivation. hBN-based passivation layers are especially useful in cases where the growth of lattice-matched passivation layers is complicated.
NPJ 2D MATERIALS AND APPLICATIONS
(2021)
Article
Materials Science, Ceramics
Shota Daiki, Toshihiro Ishikawa
Summary: In this study, the size and thickness of h-BN particles are controlled using carbothermal reduction nitridation (CRN) and developed into resin sheets. By utilizing h-BN particles grown in the thickness direction, resin sheets with high thermal conductivity have been successfully achieved.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Engineering, Environmental
Dongliang Ding, Minhao Zou, Xu Wang, Guangzhao Qin, Shiyu Zhang, Qingyong Meng, Zhenguo Liu, Qiuyu Zhang, Yanhui Chen, Siew Yin Chan
Summary: With the advancement of intelligent wireless communication equipment, there is an increasing demand for thermal management materials (TMMs) with efficient in-plane heat dissipation. In this study, polydisperse hexagonal boron nitride (ae-BN) particles ranging from micrometers to nanometers were prepared through aqueous-assisted exfoliation. The results showed that ae-BN possesses high intrinsic thermal conductivity. ae-BN/polyimide (PI) composites with different ae-BN loadings were fabricated using vacuum-filtration and hot-pressing methods, and the composites with 30 vol% ae-BN loading exhibited superior in-plane thermal conductivity compared to pristine h-BN/PI composite. SEM images and structural modeling confirmed the construction of thermal conduction pathways in the composites, which increased with ae-BN content. The reduction in thermal boundary resistance of ae-BN/PI composites was demonstrated by an EMT model, and the in-plane thermal conductivity of ae-BN/PI composites with different filler contents at variable temperatures was predicted using an artificial neural network (ANN) model. Overall, ae-BN/PI composites with high thermal conductivity, electrical insulation, thermal stability, and mechanical strength were successfully fabricated, and the heat conduction mechanism was investigated, providing valuable information for the advancement of TMMs in advanced electronic devices.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Qiming Chen, Wei Wu, Yi Wang, Chao Liu, Xingrong Liu, Sufei Cui
Summary: Utilizing three-dimensional filler is a promising approach to enhance the thermal conductivity of polymer composites. A novel 3D porous carbon bonded BN foam was developed to improve the thermal performance of epoxy, showing high thermal conductivity and low dielectric constant in the composite. This research proposed a novel method to prepare composites with high thermal conductivity by designing a 3D construction with thermally conductive filler.
Article
Polymer Science
Xue Li, Ling Weng, Hebing Wang, Xiaoming Wang
Summary: By incorporating silver nanowires and hexagonal boron nitride as fillers in epoxy resin, the thermal conductivity of the composites can be greatly increased while having minimal impact on the electrical properties.
Article
Chemistry, Physical
Fanghong Yang, Xiaopeng Sun, Xing Zhang, Zhanhai Yao
Summary: The study shows that by reacting h-BN with sulfonyl chloride at room temperature, active groups can be generated, which can then be used to introduce PEG through a DielsAlder reaction. This improves the dispersibility and compatibility of h-BN in epoxy resin matrix, leading to enhanced thermal conductivity of the composites.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Zetan Liu, Shiqiang Zhao, Tian Yang, Ji Zhou
Summary: The machinability of aluminum nitride-hexagonal boron nitride (AlN-h-BN) ceramics can be improved while maintaining high strength and thermal conductivity by incorporating up to 30 wt% BN as a secondary phase and using yttrium oxide as a sintering aid. The addition of sintering additives helps purify grain boundaries and enhance densification. The optimal BN content enhances flexural strength and fracture toughness of the composite ceramics.
JOURNAL OF ADVANCED CERAMICS
(2021)
Article
Materials Science, Composites
Houbao Liu, Xinqing Su, Renli Fu, Binyong Wu, Xudong Chen
Summary: By adding short carbon fibers and boron nitride particles to the PDMS matrix, the thermal conductivity and electrical insulation of the flexible polymer composite films were significantly enhanced, showing excellent electrical insulation properties. The combination of SCF and BN particles constructed an effective thermal conduction path while inhibiting the formation of conductive paths, leading to a 990% enhancement in thermal conductivity compared to pure PDMS.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Houzhen Chen, Yanzhi Wang, Wangxi Zhang, Yu Nan, Xianyang Yue, Yifei Zhang, Huiling Fan
Summary: The effects of BN and Al2O3 compounding on the thermally conductive, crystalline, and mechanical properties of PP thermally conductive composites were investigated. It was found that BN and Al2O3 can be uniformly dispersed and oriented in the PP matrix, forming a three-dimensional thermal conductivity pathway. The composite with BN volume share of 9.09% and Al2O3 volume share of 8.10% exhibited significantly improved thermal conductivity and mechanical properties compared to pure PP. Additionally, PP/BN-9.09/Al2O3-8.25 showed effective heat dissipation performance for LED lamps.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Sijiao Wang, Kaiming Cao, Guanwei Wang, Mengmeng Chen, Hongxi Wang
Summary: In this study, the thermal conductivity of epoxy resin was improved by using modified boron nitride of different scales. The addition of modified boron nitride fillers can lead to the development of composite materials with excellent insulation and thermal conductivity properties.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Ceramics
Minggan Chen, Jiwei Xie, Canguang Xiong, Hui Wang
Summary: The study successfully synthesized h-BN-based aerogels through a cast-freezing method, which are characterized by low cost, low energy consumption, controllable porosity, and hydrophobicity. By using CMC as a compounding agent, the structure and properties of the aerogels were controlled, leading to high oil absorption performance.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Multidisciplinary
Yexiang Cui, Di Bao, Fei Xu, Yueyang Gao, Xiguang Zhang, Haolei Geng, Yixi Zhou, Yanji Zhu, Huaiyuan Wang
Summary: This study successfully prepared lightweight and highly thermally conductive composites by utilizing hexagonal boron nitride and polymers, achieving a significant enhancement in thermal conductivity at low filler loading and demonstrating excellent thermal management capabilities.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Polymer Science
Isaac Isarn, Francesc Ferrando, Angels Serra, Cristina Urbina
Summary: A new series of high thermal boron nitride composites were prepared and characterized by several techniques, showing that the addition of BN filler can significantly improve thermal conductivity. The curing process evolution and rheological properties of the composites were studied, indicating a positive influence of the filler on enhancing thermal conductivity.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Polymer Science
Ying Zhu, Yumeng Luo, Xiran Tang, Lifen Tong, Xiaobo Liu
Summary: In this research, h-BN was added to PEN as a filler to improve its thermal conductivity and electrical insulation. The influence of filler content on properties was studied in depth. The results showed that the thermal conductivity of the composites increased to 0.5444 Wm(-1) K-1 at 30 wt% filler content, with a 22.89% increment compared to PEN copolymer without additive. The PEN/h-BN composite exhibited excellent thermal properties and improved dielectric constant and insulation performance. The tensile strength was 62.3 MPa and the elastic modulus was 3567.5 MPa. In conclusion, the 30 wt% h-BN/PEN composite prepared in this research has great potential and promising prospects in the field of electronics.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Telecommunications
Tata Jagannadha Swamy, Garimella Ramamurthy, Padmalaya Nayak
IEEE COMMUNICATIONS LETTERS
(2020)
Article
Engineering, Mechanical
Pradnya Kosbe, Pradeep Patil, Muthukumar Manickam, Gurunathan Ramamurthy
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2020)
Article
Thermodynamics
Mahesh Krishna Gaikwad, Pradeep A. Patil
CASE STUDIES IN THERMAL ENGINEERING
(2020)
Article
Computer Science, Artificial Intelligence
Rama Murthy Garimella, Marcos Eduardo Valle, Guilherme Vieira, Anil Rayala, Dileep Munugoti
Summary: The Hopfield network is an artificial neural network that is used for associative memories. This paper introduces three multi-modal Hopfield-type neural networks that treat multi-dimensional data as a single entity. These networks have potential applications in multi-modal intelligence, as well as signal and image processing, optimization, and classification tasks.
NEURAL PROCESSING LETTERS
(2023)
Article
Computer Science, Artificial Intelligence
Garimella Rama Murthy
Summary: This research establishes the relationship between eigenvectors of a synaptic weight matrix and the stable/anti-stable states of the discrete-time Hopfield associative memory. It also discusses the synthesis of the weight matrix with desired states using spectral representation and the use of eigenvalues to improve noise immunity of the Hopfield neural network. The problem of optimal synthesis of Hopfield associative memory is also formulated.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2023)
Article
Energy & Fuels
Suhas M. Shinde, Dayanand M. Kawadekar, Pradeep A. Patil, Virendra K. Bhojwani
Summary: This study explores the erosion of aluminium pipes using nano and micro particles, finding that micro particles lead to higher erosion compared to nano particles. Erosion is primarily influenced by particle impact angle and turbulence - secondary flow.
INTERNATIONAL JOURNAL OF AMBIENT ENERGY
(2021)
Article
Energy & Fuels
Mahesh Krishna Gaikwad, Pradeep Anandrao Patil, Virendra Bhojwani
Summary: The working principle of thermo-acoustic engines relies on temperature, velocity, and pressure gradients across the regenerator. Computational fluid dynamics is crucial for numerical modeling of complex thermo-acoustic phenomena. The temperature deviation for hydrogen was greater than that observed for air and helium.
INTERNATIONAL JOURNAL OF AMBIENT ENERGY
(2021)
Proceedings Paper
Green & Sustainable Science & Technology
Garimella Ramamurthy, Tata JagannadhaSwamy, Aishwarya Jain
Summary: This research proposes an energy-efficient sensor placement method on a uniform rectangular grid in a Wireless Sensor Network, as well as discusses distributed computation of minimum and/or maximum values over the sensor field to minimize computations and communication delay.
2021 INTERNATIONAL CONFERENCE ON SUSTAINABLE ENERGY AND FUTURE ELECTRIC TRANSPORTATION (SEFET)
(2021)
Review
Energy & Fuels
Suhas M. Shinde, Pradeep A. Patil, Virendra K. Bhojwani
Summary: This paper discusses the origins of solid particles that cause erosion of system components, the impact of erosion and the factors contributing to it, especially the effect of nanoparticles on erosion. The research shows that erosion is a complex phenomenon that requires special attention.
INTERNATIONAL JOURNAL OF AMBIENT ENERGY
(2021)
Review
Energy & Fuels
Pradnya Kosbe, Pradeep Anandrao Patil
Summary: This paper discusses various analytical methods and models for determining the effective thermal conductivity of different polymer composite materials, as well as the impact of conductive fillers' shape, size, and volume fraction on the effective thermal conductivity.
INTERNATIONAL JOURNAL OF AMBIENT ENERGY
(2021)
Article
Energy & Fuels
Mahesh Krishna Gaikwad, Pradeep A. Patil, Vikas Thate, Yogesh Jadhav, Shubham Chabukswar
Summary: The thermo-acoustic engine utilizes temperature differences generated by heat exchangers to produce oscillations across the regenerator mesh. Computational fluid dynamics techniques are used to analyze the distribution of pressure, velocity, and temperature inside the engine assembly, while considering the effects of energy and buoyancy on turbulence generation. The amplification of acoustic power and visualization of nonlinear phenomena in the thermo-acoustic engine are also observed in the computational results.
INTERNATIONAL JOURNAL OF AMBIENT ENERGY
(2021)
Article
Energy & Fuels
Suhas M. Shinde, Pradeep A. Patil, Virendra K. Bhojwani
INTERNATIONAL JOURNAL OF AMBIENT ENERGY
(2020)
Article
Energy & Fuels
Mahesh Krishna Gaikwad, Pradeep A. Patil, Dadasaheb Shendage, Virendra K. Bhojwani
INTERNATIONAL JOURNAL OF AMBIENT ENERGY
(2020)
Article
Materials Science, Multidisciplinary
Shuanghui Zeng, Xue Wang, Yunqian Zhang, Jiaojing Shao, Zhao Ding, Jie Zhao
Summary: A free-standing 3D core/shell composite material CNTs@Co9S8 on nickel mesh has been prepared using a simple two-step method. The composite material exhibits excellent conductivity and charge storage capability, making it a promising candidate for supercapacitor applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Marieta Belcheva, Georgi Georgiev, Boyko Tsyntsarski, Urszula Szeluga, Lyudmila Kabaivanova
Summary: This study successfully prepared new antibacterial materials by combining activated carbon with metal nanoparticles, taking advantage of the well-known antibacterial activity of metal nanoparticles. The obtained composites exhibited strong antibacterial effects against E. coli and S. aureus, with the antibacterial activity depending on the contact time, bacterial species, nature of the metal, and metal concentration. The findings provide novel materials with antibacterial properties for further development and potential application in hygiene devices.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
V. P. Madhurima, Kusum Kumari, P. K. Jain
Summary: In this study, carbon nanomaterials were synthesized using the arc discharge technique, with a focus on optimizing process parameters to improve yield and quality. The materials were characterized using various analytical tools, and their dye adsorption capabilities were evaluated. The results showed that carbon soot had better adsorption performance compared to carbon nanotubes, indicating the potential of these carbon nanomaterials for environmental remediation applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zhaolong Sun, Bo Cui, Pingping Liang, Qimeng Liu, Nan Gao, Hongdong Li
Summary: This study explores the potential of hafnium (Hf) terminated diamond surfaces in achieving negative electron affinity (NEA). By using swarm-intelligence structural search and first-principles calculations, the researchers found that Hf-terminated diamond surfaces exhibit stable NEA properties and high thermal stability, making them promising candidate materials for electron emission applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
N. Soltani, N. Tavakkoli, E. Eslami, L. S. Mirmohammadi
Summary: In this project, a carbon paste electrode modified with graphene and ZnFe2O4 spinel nanoparticles (Gr/ZnFe2O4/CPE) was used to measure naproxen, and various electrochemical methods were used to investigate its behavior. By optimizing the parameters, good measurement results were obtained.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Xiwei Cui, Yue Qin, Xin Han, Huanyi Chen, Xinxin Ruan, Hui Zhang, Chengcheng Jiao, Rongqi Mao, Jinglin Hao, Sizhuang Zhao, Shuai Hou, Xiaoxuan Pian, Yandong Wang, Kazuhito Nishimura, Lifen Deng, Nan Jiang
Summary: This paper investigates the friction and wear behaviors of two types of polycrystalline diamonds against different materials. The results show that increasing surface roughness leads to an increase in coefficient of friction. The coefficient of friction and wear rate of ceramic Si3N4 balls are generally lower than those of steel GCr15 balls, except for one type of polycrystalline diamond. Transfer films of SiO2 and its hydrate are observed at the friction interface, which contribute to smoother friction and wear. Carbon-based transfer films are also identified, mainly catalyzed by residual cobalt in the polycrystalline diamonds, leading to a phase transformation.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Menglei Sun, Pengjun Li, Mao Wang, Yidan Liang, Xudong Yang, Shujie Pang
Summary: In this study, carbonized polymer dots were synthesized by a one-step hydrothermal method, and silver nanoclusters were synthesized by UV lamp irradiation. They were then self-assembled by electrostatic force to prepare a dual-emission fluorescent nanocomposite that responds to temperature changes. The nanocomposite showed two emission peaks and exhibited excellent linearity between 20°C and 80°C.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Mohamed J. Saadh, Durgesh Singh, Diego Mayorga, Anjan Kumar, Maria Albuja, Ahmad Ismael Saber, Mohammed Ahmed Mustafa, Yasser Elmasry, Noubu Sun
Summary: Based on density functional theory, it is found that the C3N monolayer has good adsorption capability for Hg0 and a short recovery time. This study suggests that the C3N monolayer is a promising adsorbent material for efficient control of gaseous mercury.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Rajendra Kumar Nare, Sivalingam Ramesh, Vijay Kakani, Yuvaraj Haldorai, Chandrasekaran Karthikeyan, Basivi Praveen Kumar, Nadavala Siva Kumar, Mohammad Asif, S. Naresh Kumar, D. Prakash Babu, K. Ramakrishna Reddy, Visweswara Rao Pasupuleti
Summary: This study examines the latest advancements in carbon nanotube (CNT) supercapacitors and related composites, aiming to identify strategies for enhancing their performance. The researchers used ultrasonication aided hydrothermal technique to synthesize a composite made of nitrogen doped carbon nanotubes and porous NiCo2O4 nanomaterial. The composite electrode exhibited excellent cycling stability and a rising specific capacitance, making it appealing for high-performance supercapacitor applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
D. Mary Deena, S. Arockia Anushya, A. Dhanusha, T. C. Sabari Girisun, A. Philominal
Summary: A single-beam Z-Scan experiment was conducted to investigate the nonlinear optical absorption and optical limiting properties of Bi2O3, rGO/Bi2O3, Bi2O3/WO3, and rGO/Bi2O3/WO3 nanostructures. The results showed that the synthesized nanostructures exhibited varying levels of nonlinear absorption, with bismuth-based nanostructures showing the lowest optical limiting threshold and a higher two-photon absorption coefficient. The presence of rGO contributed to the extended conjugation for charge transfer, while the strong UV-Visible absorption of Bi2O3 and WO3 led to a unique nonlinear optical response.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Weibing Guo, Yiren Hu, Tao Wang, Xiaoguang Chen
Summary: This study investigated the microstructure and forming mechanism of graphite/copper joints that were brazed using Ti-containing filler. The results showed that increasing the brazing temperature improved the heat transfer and tensile properties of the composites. Additionally, the composites exhibited high heat flux and faster heating rate compared to copper and aluminum.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Ming Li, ZhiWen Wang, Yu Teng, Hongyu Zhao, Bowei Li, Yang Liu, Shengxue Wang, Zhenze Yang, Liangchao Chen, Hongan Ma, Xiaopeng Jia
Summary: In the experiment, different Ni-content catalysts were used to synthesize diamond crystals, and the properties of the synthesized diamonds were analyzed. The results revealed that the Ni content in the catalyst affects the crystallinity of diamond crystals and the nitrogen crystallinity. The photoluminescence spectroscopy also showed that the diamond synthesized by using Fe-containing catalyst has specific NV-color center structure.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Ling-Feng Mao
Summary: This study proposes an LSTM model to predict the work function of adsorbed metal atoms on graphene, which can quickly screen surface structures with target work function, saving computing and time costs, and improving device performance.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Runzhou Xu, Yinshui Liu, Qian Cheng, Zhenyao Wang, Kai Ma, Peiling Ke, Yipan Deng
Summary: The wear resistance of 17-4PH stainless steel was significantly improved by depositing multi-layered Cr/CrC/DLC coating at wide temperature range. The coating exhibited excellent lubrication and protective properties, and the wear mechanism changed with increasing temperature. The tribochemical reaction during the wear process played a crucial role in the graphitization transformation and friction properties of the coating.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Xilong Guo, Jiaxin Song, Shanling Wang, Li Lei, Omololu Odunmbaku, Ayoub Taallah, Yi He, Aiqun Gu, Filippo S. Boi
Summary: The recent observations of superconductive-ordering in carbon-based systems consisting of rhombohedral stacking-faults, trilayer graphene (ABC-stacks) or dislocation-rich interfaces (pyrolytic graphite) have attracted significant attention. In this study, an unusual nucleation of rhombohedral stacking-faults in low-dimensional systems comprising of multiwall carbon nanotube (CNT) buckypapers was reported. The presence of sulfur doping resulted in a broad-band at the Raman shift from 1800 to 2000 cm(-1), indicating contributions arising from disorder-rich regions with rhombohedral stacking-order (ABC-stacks). These observations were further supported by X-ray diffraction and Rietveld refinements.
DIAMOND AND RELATED MATERIALS
(2024)
