Article
Chemistry, Physical
Haoguang Huang, Xin Ming, Yazhe Wang, Fan Guo, Yingjun Liu, Zhen Xu, Li Peng, Chao Gao
Summary: By using graphene as a template, high crystalline and thermally conductive graphite film was successfully produced from polyacrylonitrile in a confined 2D space. The flexible graphite film showed significantly higher thermal conductivity and conductivity compared to pure PAN and pure graphene films, and it is easy to produce.
Article
Environmental Sciences
Tianmeng Zhang, Haimeng Huang, Weiwei Zhang, Zhiyong Lu, Mingxia Shen, Tao Liu, Jie Bai, Yan Yang, Jianfeng Zhang
Summary: This study develops a photocatalytic separation film with high dye removal rate and self-cleaning ability by structural tailoring of bacterial cellulose. The film exhibits excellent stability under various extreme conditions, indicating its potential application in treating dye pollutants.
Article
Nanoscience & Nanotechnology
Huige Wei, Ang Li, Deshuo Kong, Zhengzheng Li, Dapeng Cui, Tuo Li, Binbin Dong, Zhanhu Guo
Summary: The study presented a convenient method for preparing films suitable for wearable piezoresistive sensors, showing excellent performance with high sensitivity, short response time, and ability to withstand large amounts of repetitive motion.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Chemistry, Physical
Kensuke Murashima, Yuki Kawashima, Shuhei Ozaki, Atsushi Tatami, Masamitsu Tachibana, Takeo Watanabe, Tetsuo Harada, Mutsuaki Murakami
Summary: The study developed a new method of heat treatment for polyimide to prepare self-standing graphite thin films with high quality and uniform thickness. Reactive ion etching was used to thin the films and enhance their conductivity, showing promising results for industrial applications.
Article
Engineering, Electrical & Electronic
O. Zaca-Moran, J. F. Sanchez-Ramirez, J. L. Herrera-Perez, J. Diaz-Reyes
Summary: Graphene oxide quantum dots were synthesized from electrospun PAN nanofibers through carbonization, ultrasonic exfoliation, and oxidation processes. The resulting GOQDs showed a high density of crystalline defects and emitted radiative bands in the blue spectral region.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Dong An, Yucheng Chen, Rizheng He, Huitao Yu, Zhijian Sun, Yifan Liu, Yaqing Liu, Qingsong Lian, Wei Feng, Chingping Wong
Summary: Polymer-based thermal interface materials (TIMs) have been widely used in electronics to improve heat transfer. However, it is still a challenge to enhance thermal conductivity and heat dissipation in high power density applications. Recently, TIMs with introduced templates, such as reduced graphene oxide (rGO) with 3D networks, have gained attention. In this study, rGO/natural rubber (rGO/NR) TIMs were successfully fabricated, exhibiting improved thermal conductivity and electromagnetic interference shielding performance. This research provides important guidance for the design of TIMs with excellent comprehensive performance for thermal management.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Engineering, Manufacturing
Kang Xie, Yuhang Liu, Yuxin Tian, Xunen Wu, Lingyu Wu, Yanling Mo, Guopeng Sui, Rongni Du, Qiang Fu, Feng Chen
Summary: Introducing aramid nanofiber into graphene nanosheet films achieves a delicate balance between flexibility and electric/thermal conductivities, enhancing mechanical properties. The addition of a small amount of water in the suspension helps recover hydrogen bonds between nanofibers, leading to a stable framework and improving overall performance of the composite films.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Chemistry, Multidisciplinary
Junghyun Park, Donghyun Kim, Hyunsik Kim, Junghoon Lee, Wonsub Chung
Summary: In this study, the heat dissipation of a copper heat sink was enhanced by surface modifications to increase its thermal emissivity, allowing an LED module to operate at a lower temperature. The nanoporous oxide layer formed through heat treatment acted as a thermal barrier for heat transfer, and optimization between oxide thickness and thermal emissivity is necessary for efficient heat dissipation. An oxide layer with an emissivity of 0.857 and slightly lower thermal diffusivity than copper showed the best performance in lowering the LED operating temperature.
Article
Thermodynamics
Nidhish Kumar Mishra, Khalid Abdulkhaliq M. Alharbi, Khaleeq Ur Rahman, Adnan, Sayed M. Eldin, Mutasem Z. Bani-Fwaz
Summary: The heat transport investigation in non-Newtonian fluids suspended by distinct sort of nanoparticles is analyzed over a cylinder with wavy radius. Factors such as dissipation, thermal slip, surface convection, and stretching/shrinking are taken into account. The results show that the nanofluid velocity and heat transmission can be optimized by adjusting the Casson number, Eckert number, Biot number, and particle concentration.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Timm Swoboda, Nicolas Wainstein, Sanchit Deshmukh, Cagil Koroglu, Xing Gao, Mario Lanza, Hans Hilgenkamp, Eric Pop, Eilam Yalon, Miguel Munoz Rojo
Summary: Heat dissipation is a major concern for electronic devices, especially at the nanoscale. Scanning thermal microscopy (SThM) is a versatile tool for measuring device temperature with nanoscale resolution but quantifying thermal features is challenging. This study calibrates a thermo-resistive SThM probe using metal lines of different widths and evaluates its sensitivity under different conditions. The results provide new insights for accurately determining the temperature of scanned devices.
Article
Mechanics
Zhihui Zhang, Xiaoyu Wu, Xian Wang
Summary: This study uses a recursive regularized thermal lattice Boltzmann method (RR-TLBM) to investigate near-wall vortices and the effects of flow states in a coupled-domain transpiration cooling system. The results show that near-wall flow structures exhibit spatial characteristics in the streamwise direction, and vortex evolution promotes downstream heat dissipation. The study also found that small-scale structures are beneficial for turbulent heat transfer. The cooling performance of the coolant film improves at lower Reynolds numbers but is impaired at higher Reynolds numbers.
Article
Environmental Sciences
Yasir Hussain Siddiqui, Muhammad Shakaib, Adnan Rasheed, Hafiz Muhammad Ali, Syed Mohammad Rizwan Azeem, Athar Husain Siddique, Muhammad Shafiq
Summary: The present study investigates the effectiveness of graphite and iron oxide nanofuel additives on exhaust emissions and performance of a gasoline engine. Results show that graphite blends have higher brake power, brake thermal efficiency, and torque, as well as lower brake-specific fuel consumption, NOx, and CO2 emissions compared to iron oxide blends. However, graphite blends produce more CO and HC emissions. Overall, graphite nanoparticles are more engine and environment friendly than iron oxide fuel additives.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Thermodynamics
Yu Zhao, Zhengguo Zhang, Ziye Ling, Xuenong Gao, Xiaoming Fang
Summary: This study developed a novel thermal pad by combining expanded graphite with low melting point alloy, which exhibited high thermal conductivity and good shape-stability. The composite thermal pad showed excellent performance in terms of heat dissipation efficiency and resistance to thermal shock, making it suitable for chip thermal management systems.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Tian-Hu Wang, Bin Shen, Hang Zhao, Liang Wang, Ming-Yang You
Summary: Ionic wind technique has great potential for cooling compact electronic devices, but its heat removal capability for high power density is limited. By coupling a porous medium, heat transfer can be significantly boosted. The electrode configuration significantly influences device performance. Optimization of the geometry and property parameters of the porous block improves cooling performance. Coupling a heat sink with porous fins further enhances the performance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Chemistry, Analytical
Mina Rouhani, Ahmad Soleymanpour
Summary: An ultrasensitive electrochemical sensor for the selective voltammetric measurement of trace ceftizoxime (CFX) was developed by modifying a pencil graphite electrode (PGE) with reduced graphene oxide (r-GO) and Preyssler nanocapsules (PNCs). The sensor showed high sensitivity and reliability under optimized conditions, allowing for successful detection of trace amounts of CFX in pharmaceutical and blood serum samples.
MICROCHEMICAL JOURNAL
(2021)
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.