Article
Chemistry, Multidisciplinary
Meng Li, Bowen Liu, Zhijian Liu, Yumeng Xiao, Hongmin Guo, Zehao An, Lidong Wang, Tony D. James
Summary: Solar steam generation is an efficient solution to address freshwater shortages. Researchers have developed a porous hydrogel material for metal ion adsorption, which can be used for solar steam generation at a high evaporation rate. Additionally, a heat management strategy involving a cold surface is proposed to enhance water evaporation.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Regina Galceran, Frederic Bonell, Lorenzo Camosi, Guillaume Sauthier, Zewdu M. M. Gebeyehu, Maria Jose Esplandiu, Alois Arrighi, Ivan Fernandez Aguirre, Adriana I. I. Figueroa, Juan F. F. Sierra, Sergio O. O. Valenzuela
Summary: Researchers demonstrate passivated and intermixing-free interfaces in topological insulator Bi2Te3 using dry-transferred CVD graphene. It is also shown that graphene acts as an efficient metal and chalcogen diffusion barrier in Bi2Te3/graphene/permalloy heterostructures. These findings provide new possibilities for controlling and engineering topological insulator interfaces in spintronic applications.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Yaniv Cohen, Siva K. Reddy, Assaf Ya'akobovitz
Summary: Effective heat dissipation is crucial for the long-term operation and miniaturization of electronic devices. Graphene foams and carbon nanotube forests, due to their excellent thermal conduction and low thermal interface resistance, show promise in thermal applications such as heat dissipation. By studying the heat transfer characteristics under forced convection, we found that boundary layers significantly affect heat transfer in our samples, reducing heat transfer in the horizontal direction while the vertical direction is dominated by material conduction and exhibits higher heat transfer. This research uncovers the fundamental thermal behavior of graphene foams and carbon nanotube forests, paving the way for their successful integration into cooling devices and other thermal applications.
Article
Chemistry, Multidisciplinary
Minho Seong, Insol Hwang, Seongjin Park, Hyejin Jang, Geonjun Choi, Jaeil Kim, Shin-Kwan Kim, Gun-Ho Kim, Junyeob Yeo, Hoon Eui Jeong
Summary: The study introduces a self-interfacing flexible thermal device (STD) that can form robust contact on planar and non-planar substrates with low-resistant thermal contact, without the need for external pressure or surface modification.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Houssem Rezgui
Summary: This study provides an efficient framework for identifying hydrodynamic heat transport and second sound propagation in graphene. It solves the dual-phase-lag model and the Maxwell-Cattaneo-Vernotte equation using the finite element method with ab initio data. The study emphasizes the detection of thermal wave-like behavior using macroscopic quantities, going beyond Fourier's law. It also observes a crossover from the wave-like regime to diffusive heat transport, as predicted by mesoscopic equations. This research is of great importance for future experimental detection of second sound propagation above 80 K.
Article
Green & Sustainable Science & Technology
Jialin Sun, Zhifu Huang, Jun Zhao, Ke Yan
Summary: The research revealed that the MLG/WC-Co tool outperformed the YG6 tool in terms of reduced cutting forces, temperatures, and friction coefficients, as well as improved shear angles and tool life. The introduction of strengthening and toughening mechanisms through MLG significantly enhanced wear resistance, while the residual compressive stress from the laminated structure compensated for cutting force-induced tensile stress. Additionally, the extensive MLG film formed at the tool-chip interface during high-speed cutting provided self-lubricating functionality and exceptional wear and oxidation resistance.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Mathematics, Applied
Kyungtae Min, Minkyu Oh, Cheolwoong Kim, Jeonghoon Yoo
Summary: This study proposes a novel method for the structural design of thermal conductors using functionally graded materials (FGMs). The effective thermal conductivity of the FGM composite is determined through the representative volume element (RVE) homogenization method under periodic boundary conditions. A neural network fitting approach is used to build a prediction module for the effective thermal conductivity corresponding to shape changes of the unit structure. The optimization process simultaneously optimizes the overall topological layout and local fibrous material layout to maximize thermal conduction performance.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2023)
Letter
Physics, Multidisciplinary
Mingtian Xu
Summary: This study proposes a simple algorithm for solving the Guyer-Krumhansl equations and examines the relationship between thermal conductivity of suspended graphene and heat flux boundary conditions. The results show that heat vortices can occur in the heat flux field when the strength of the point sink exceeds a critical value. Additionally, it is observed that the formation of heat vortices is also influenced by the side length perpendicular to the dominant heat flow direction. Furthermore, the study finds that the no-slip boundary condition facilitates the generation of heat vortices, while specular phonon-boundary interactions disrupt their formation. Interestingly, it is discovered that hydrodynamic heat conduction allows heat to flow from cold regions to hot regions in suspended single-layer graphene.
Article
Thermodynamics
Yangyu Guo, Zhongwei Zhang, Masahiro Nomura, Sebastian Volz, Moran Wang
Summary: This study investigates the thermal phonon vortex in graphene ribbon using the discrete-ordinate solution of the phonon Boltzmann equation under Callaway's dual relaxation model. The obtained phonon scattering rates from ab initio calculations reveal the transition from phonon vortex transport to conventional Fourier's heat conduction. The physical mechanism behind the evolution of the phonon vortex is attributed to the wide phonon mean free path distribution of resistive processes, resulting in a hierarchical vortex series in complex geometries.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Physics, Multidisciplinary
Zehua Chen, Kefeng Wang, Zhao Hao, Kailin Ren, Luqiao Yin, Aiying Guo, Jianhua Zhang, Xiuzhen Lu
Summary: Due to their excellent in-plane thermal transport properties, graphene, hexagonal boron nitride, and their heterostructures have great potential in thermal management applications. This study investigated the in-plane thermal conductivity of G/hBN van der Waals heterostructures and found that the TC of G/hBN vdW heterostructures increased by 16% compared to monolayer hBN. The addition of graphene increased the TC of multilayer hBN by 60%. The interlayer coupling strength affected the TC of G/hBN vdW heterostructures, which was influenced by the number of layers and vertical thermal transport.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Polymer Science
Lei Zhang, Gan Jin, Tianlin Ma, Shi Wang
Summary: Designing and constructing novel topological polymer electrolyte matrices can enhance the ionic conducting ability of the prepared SPEs. In this study, a novel electrolyte matrix was successfully constructed using triphenylene as core and block poly(methyl methacrylate)-poly(poly[ethylene glycol] methyl ether methacrylate) as arm via sequential atom transfer radical polymerization. The optimal SPE obtained through solution casting showed higher ionic conductivity at ambient temperature.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Lingling Yang, Yanjie Zhu, Haokai Liu, Tao Guo, Hui Tang, Shuangdong Ya, Yu Li, Hongguang Wang, Yanli Luo, Jiuming Ma, Dong Wan
Summary: Galvanostatic electrochemical co-deposition was used to fabricate nickel-based reduced graphene oxide (Ni-rGO) nanocomposite with varying current density and GO loading. The morphology of the composite was transformed into a rough and three-dimensional structure by excessive incorporation and reduction of GO. The formation of Ni-rGO composite coatings was confirmed by SEM and XRD analysis. Moreover, the thermal properties of the Ni-rGO composite were comprehensively investigated, and the relationship between current density and thermal conductivity was evaluated. The prepared Ni-rGO composite exhibited excellent thermal conductivity and corrosion resistance, making it highly promising for cooling systems in ships and heat dissipation systems in ocean electronic equipment.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Long Chen, Qingbao Yang, Xue Yang, Zhanqiang Liu, Qinghua Song
Summary: Based on micro morphology, a thermo-mechanical coupling model of shape memory graphene oxide/epoxy resin (SMGO/EP) was proposed to effectively predict the shape memory characteristics of the composites. The results showed that the doping of graphene oxide significantly enhanced the heat transfer capability and shape memory ability of the composites.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Physics, Multidisciplinary
In-Hwan Lee, Hoang-Anh Le, S. -R. Eric Yang
Summary: In graphene, different chirality carbon lines entangle with each other in both the topologically ordered phase and crossover phases, with the entanglement increasing as more carbon lines are grouped together. No long-range entanglement was found in the symmetry-protected phase in the absence of disorder.
Article
Engineering, Chemical
Jianhui Zhou, Xin Lai, Jianfeng Hu, Haijie Qi, Shan Liu, Zhengguo Zhang
Summary: In this study, a novel erythritol-based phase change material (PCM) was developed by combining graphene oxide (GO) modified melamine foam (MF) and polyaniline (PANI) through blending and porous material adsorption modification. The composite PCM showed improved performance in terms of supercooling reduction, thermal conductivity enhancement, and thermal stability. The results indicate that the composite PCM has potential applications in energy storage.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Bo Sun, Xiaokun Gu, Qingsheng Zeng, Xi Huang, Yuexiang Yan, Zheng Liu, Ronggui Yang, Yee Kan Koh
ADVANCED MATERIALS
(2017)
Article
Physics, Applied
Sit Kerdsongpanya, Bo Sun, Fredrik Eriksson, Jens Jensen, Jun Lu, Yee Kan Koh, Ngo Van Nong, Benjamin Balke, Bjoern Alling, Per Eklund
JOURNAL OF APPLIED PHYSICS
(2016)
Article
Chemistry, Multidisciplinary
Bin Huang, Yee Kan Koh
ADVANCED MATERIALS INTERFACES
(2017)
Article
Nanoscience & Nanotechnology
Weidong Zheng, Bin Huang, Hongkun Li, Yee Kan Koh
ACS APPLIED MATERIALS & INTERFACES
(2018)
Article
Chemistry, Physical
Bo Sun, Georg Haunschild, Carlos Polanco, James (Zi-Jian) Ju, Lucas Lindsay, Gregor Koblmueller, Yee Kan Koh
Article
Materials Science, Multidisciplinary
Hongkun Li, Weidong Zheng, Yee Kan Koh
PHYSICAL REVIEW MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Qingsheng Zeng, Bo Sun, Kezhao Du, Weiyun Zhao, Peng Yu, Chao Zhu, Juan Xia, Yu Chen, Xun Cao, Qingyu Yan, Zexiang Shen, Ting Yu, Yi Long, Yee Kan Koh, Zheng Liu
Article
Nanoscience & Nanotechnology
Weidong Zheng, Bin Huang, Yee Kan Koh
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Nanoscience & Nanotechnology
Weidong Zheng, Connor J. McClellan, Eric Pop, Yee Kan Koh
Summary: In this study, accurate measurements of thermal boundary resistance (R) of 2D material interfaces were conducted. It was found that, in addition to phonon transport, thermal resistance between nonequilibrium phonons in the 2D materials could also play a critical role. These findings provide important insights into heat dissipation in 2D material devices and highlight the significance of considering the influence of nonequilibrium phonons in device design.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Qinshu Li, Fang Liu, Song Hu, Houfu Song, Susu Yang, Hailing Jiang, Tao Wang, Yee Kan Koh, Changying Zhao, Feiyu Kang, Junqiao Wu, Xiaokun Gu, Bo Sun, Xinqiang Wang
Summary: This study reveals that even for materials with similar Debye temperatures, a significant portion of phonons can transport inelastically across interfaces at high temperatures, greatly enhancing the interface thermal conductance. The sharpness of the interface strongly affects the phonon transport process. These findings provide new insights and opportunities for engineering interface thermal conductance in microelectronics materials.
NATURE COMMUNICATIONS
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Si Kuan Thio, Sungwoo Bae, Yee Kan Koh, Sung-Yong Park
Summary: A plasmonic-enhanced floating electrode optoelectronic tweezers (FEOET) device has been developed for effective optical droplet manipulation, utilizing metallic nanoparticles to enhance light absorption and significantly improve dielectrophoretic (DEP) performance. This technology showed an 11-fold increase in light-actuated droplet speed and provides a low-cost solution for various digital microfluidic (DMF) applications.
2021 21ST INTERNATIONAL CONFERENCE ON SOLID-STATE SENSORS, ACTUATORS AND MICROSYSTEMS (TRANSDUCERS)
(2021)
Article
Materials Science, Multidisciplinary
H. Li, R. Hanus, C. A. Polanco, A. Zeidler, G. Koblmueller, Y. K. Koh, L. Lindsay
Article
Materials Science, Multidisciplinary
Puqing Jiang, Lucas Lindsay, Xi Huang, Yee Kan Koh
Article
Materials Science, Multidisciplinary
Sit Kerdsongpanya, Olle Hellman, Bo Sun, Yee Kan Koh, Jun Lu, Ngo Van Nong, Sergei I. Simak, Bjoern Alling, Per Eklund
Article
Chemistry, Physical
Jie Sheng, Jingshan He, Dun Ma, Yuanbo Wang, Wu Shao, Tian Ding, Ronghao Cen, Jingwen He, Zhihao Deng, Wenjun Wu
Summary: This study presents an innovative approach to improve the photovoltaic conversion characteristics and stability of perovskite solar cells through carbon electrode interface modification. By in-situ polymerization and carbonization on the surface of nano-graphite, a dendritic structure carbon electrode is formed, reducing the work function and aligning the energy levels with perovskite. This leads to improved charge and hole collection efficiency, resulting in increased photovoltaic conversion efficiency. Furthermore, the modified carbon electrode-based perovskite solar cells exhibit exceptional stability, maintaining high efficiency even without encapsulation.
Article
Chemistry, Physical
Guodong Shi, Jian Song, Xiaoxiao Tian, Tongtong Liu, Zhanjun Wu
Summary: This study demonstrates the improvement of mechanical properties and reduction of coefficient of thermal expansion (CTE) in graphene oxide (GO)/epoxy (EP) nanocomposites by enhancing the interface between GO and EP through functionalization and incorporating rigid-flexible interphases. The results reveal that the SiO2-PEA-GO hybrid exhibits better strengthening and toughening effects, as well as lower CTE, compared to the PEA-GO hybrid due to the presence of rigid-flexible interfaces with higher bonding strength and better energy dissipation mechanisms. Additionally, the nanocomposites with longer polyetheramine (PEA) molecules in the rigid-flexible interphases demonstrate higher strength and toughness, while maintaining a lower CTE. This work provides a promising strategy for constructing adjustable flexible-rigid interfacial structures and offers potential in developing GO/EP nanocomposites with high mechanical properties and low CTE.
Article
Chemistry, Physical
Rafal Janus, Sebastian Jarczewski, Jacek Jagiello, Piotr Natkanski, Mariusz Wadrzyk, Marek Lewandowski, Marek Michalik, Piotr Kustrowski
Summary: In this study, a facile procedure for the synthesis of CMK-1 and CMK-2 carbon replicas was developed. The method utilizes basic laboratory equipment and a renewable carbon source, and operates under mild conditions. The resulting carbon mesostructures exhibit exquisite replication fidelity and structural homogeneity, making them suitable for applications in various fields.
Article
Chemistry, Physical
Anqi Wang, Connor J. MacRobbie, Alex Baranovsky, Jean-Pierre Hickey, John Z. Wen
Summary: In this study, a novel polymer-free nanothermite aerogel with a wide range of nanoparticle loading was fabricated via a new additive manufacturing process. The SEM images showed a unique porous structure formed by extra thin rGO sheets, wrapping individual nanothermite clusters. The DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen.
Article
Chemistry, Physical
Wanze Wu, Misheng Zhao, Shiwei Miao, Xiaoyan Li, Yongzhong Wu, Xiao Gong, Hangxiang Wang
Summary: Superhydrophobic solar-driven interfacial evaporator is an energy-efficient technology for seawater desalination, which is easily fabricated using robust photothermal superhydrophobic coating and substrate. The created bifunctional coating on the melamine sponge substrate shows stable and highly efficient photothermal and superhydrophobic performance for seawater desalination. This superhydrophobic solar-driven interfacial evaporator is expected to have wide applications in seawater desalination.
Article
Chemistry, Physical
Zichen Xiang, Zhi Song, Tiansheng Wang, Menghang Feng, Yijing Zhao, Qitu Zhang, Yi Hou, Lixi Wang
Summary: This study presents a co-electrospinning synthesis strategy to fabricate lightweight and porous Co@C composite nanofibres with wideband microwave attenuation capacity. The addition of MOF-derived Co additives enhances the low-frequency absorption performance.
Article
Chemistry, Physical
J. Snow, C. Olson, E. Torres, K. Shirley, E. Cazalas
Summary: This study investigates the use of a perovskite-based graphene field effect transistor (P-GFET) device for X-ray detection. The sensitivity and responsivity of the device were found to be influenced by factors such as X-ray tube voltage, current, and source-drain voltage. Simulation experiments were conducted to determine the dose rate and energy incident on the device during irradiation.
Article
Chemistry, Physical
Zuzana Jankovska, Lenka Matejova, Jonas Tokarsky, Pavlina Peikertova, Milan Dopita, Karolina Gorzolkova, Dominika Habermannova, Michal Vastyl, Jakub Belik
Summary: This study provides new insights into microwave-assisted pyrolysis of scrap tyres, demonstrating that it can produce microporous carbon black with potential application in xylene adsorption. Compared to conventional pyrolysis, microwave pyrolysis requires less time and energy while maintaining similar adsorption capacity.
Article
Chemistry, Physical
Max Bommert, Bruno Schuler, Carlo A. Pignedoli, Roland Widmer, Oliver Groning
Summary: A detailed understanding of the interaction between molecules and two-dimensional materials is crucial for incorporating functional molecular films into next-generation 2D material-organic hybrid devices. This study compares the energy level alignment of different-sized fullerenes on a Moire superstructure and finds that C-84 fullerenes can be either neutral or negatively charged depending on slight variations of the electrostatic potential. This discovery suggests a new path to achieve ambipolar charge transfer without overcoming the electronic gap of fullerenes.
Article
Chemistry, Physical
Yuanjing Cheng, Xianxian Sun, Ye Yuan, Shuang Yang, Yuanhao Ning, Dan Wang, Weilong Yin, Yibin Li
Summary: The dual-structure aerogel (GS) consisting of flexible silica fibers and graphene honeycomb structures exhibits excellent resilience, flexibility, and reliability. It also shows remarkable wave absorbing performance, making it an ideal candidate for microwave absorption applications such as flexible electronics and aerospace.
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Chemistry, Physical
Mengdi Wang, Sanyin Qu, Yanling Chen, Qin Yao, Lidong Chen
Summary: The improved thermoelectric properties of conducting polymers are achieved by selectively capturing single-walled carbon nanotubes (SWNTs) in a conducting polymer film, leading to increased carrier mobility and reduced thermal conductivity. The resulting composite film exhibits significantly higher electrical conductivity and lower thermal conductivity compared to films with a mixture of SWNTs. This work provides a convenient and efficient method to enhance the thermoelectric properties of conducting polymers.
Review
Chemistry, Physical
Heng Wei, Weihua Li, Kareem Bachagha
Summary: This article reviews the research progress of carbon nanotube-based microwave absorbing materials (MAMs) in recent years, covering the fundamental theory, design strategies, synthesis methods, and future development directions.
Article
Chemistry, Physical
Chenguang Shi, Junlong Huang, Zongheng Cen, Tan Yi, Shaohong Liu, Ruowen Fu
Summary: This study developed a high-performance Li metal host material, which achieved dendrite-free Li deposition with a low nucleation overpotential and high Coulombic efficiencies through the combination of Ti3C2-g-PV4P sheets and Ag nanoparticles. The full cells assembled with the Li@host anode and LiFePO4 cathode exhibited high discharge capacity and excellent cycling stability, demonstrating a perspective design for future energy storage devices.
Article
Chemistry, Physical
Tomotaro Mae, Kentaro Kaneko, Hiroki Sakurai, Suguru Noda
Summary: A new partial prelithiation method for SiO/C-CNT electrodes was developed, which showed reduced irreversible capacity and achieved high energy densities with good reversibility. The method allows for precise control of the degree of prelithiation and is applicable to various chemistries.
