Article
Chemistry, Multidisciplinary
Yoon Seong Heo, Tae Wan Kim, Wooseok Lee, Jungseok Choi, Soyeon Park, Dong-Il Yeom, Jae-Ung Lee
Summary: Investigations on mesoscopic-scale stacking reconfigurations and their correlations with mechanical distortions are conducted in stacked van der Waals films. It is found that the distortions come from the transfer process or the extended impact of atomic reconstructions. Grain boundaries have a limited effect, while cracks cause inhomogeneous strain in stacked polycrystalline films.
Article
Multidisciplinary Sciences
Yang Zhang, Trithep Devakul, Liang Fu
Summary: The study reveals the formation of topological moire bands induced by displacement fields in AB-stacked TMD heterobilayers and provides a method for creating such bands. This establishes a tunable platform for realizing quantum-spin Hall and interaction-induced quantum anomalous Hall effects.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Optics
Sheng-xuan Xia, Di Zhang, Zizhuo Zheng, Xiang Zhai, Hongju Li, Jian-qiang Liu, Ling -Ling Wang, Shuang-chun Wen
Summary: In this Letter, the theoretical study of topological plasmons in Su-Schrieffer-Heeger (SSH) model-based graphene nanoribbon (GNR) layers is conducted. It is found that in the one-dimensional (1D) stacked case, only two topological modes exist, with the field localized in the top or bottom layer, as predicted by the Zak phase. Expanding the stacked 1D GNR layers to two-dimensional (2D) arrays in the in-plane direction, the topology is characterized by the 2D Zak phase, predicting the emergence of three kinds of topological modes: topological edge, surface, and corner modes. This work provides a platform for realizing topological modes in GNRs and has importance for the design of topological photonic devices such as lasers and sensors.
Review
Multidisciplinary Sciences
Nathan P. Wilson, Wang Yao, Jie Shan, Xiaodong Xu
Summary: This review discusses the exciton physics of transition metal dichalcogenides, focusing on moire patterns and exciton many-body physics, and outlines future research directions in the field. The design and control of material interfaces are foundational for realizing technologically useful effects and engineering material properties, especially in two-dimensional materials.
Article
Chemistry, Multidisciplinary
Konstantin G. Wirth, Jonas B. Hauck, Alexander Rothstein, Hristiyana Kyoseva, Dario Siebenkotten, Lukas Conrads, Lennart Klebl, Ammon Fischer, Bernd Beschoten, Christoph Stampfer, Dante M. Kennes, Lutz Waldecker, Thomas Taubner
Summary: In this study, ABCB stacked tetralayer graphene domains were identified and characterized using scattering-type scanning near-field optical microscopy and confocal Raman microscopy. By comparing experimental results with theoretical predictions, a reliable method for the recognition of ABCB domains in tetralayer graphene was established.
Article
Physics, Multidisciplinary
Jaouad El-hassouny, Ahmed Jellal, El Houssine Atmani
Summary: We investigated spin-dependent transmission in a curved graphene superlattice consisting of N cells, each made up of four regions. Through tunneling analysis, we determined all transmission and reflection channels associated with our system. Our results indicate that the number of cells decreases transmissions with the same spin. We predict a solid spin-filtering effect with sufficiently large values of d and N.
Article
Engineering, Mechanical
Tawfiqur Rakib, Pascal Pochet, Elif Ertekin, Harley T. Johnson
Summary: We observe a helical dislocation network accompanied by large out-of-plane deformation in twisted bilayer graphene (tBLG). By atomistic calculations, we demonstrate two distinct out-of-plane deformation modes, a breathing mode with small deformation and a bending mode with significantly larger corrugation. The out-of-plane deformation is caused by inhomogeneous interlayer coupling resulting from the periodic stacking order of the tBLG moire superlattice.
EXTREME MECHANICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Fabian L. Thiemann, Patrick Rowe, Andrea Zen, Erich A. Muller, Angelos Michaelides
Summary: Defects in graphene lead to higher corrugation and a more wrinkled surface, with the magnitude of this structural transformation depending on defect concentration and type. Analyzing the atomic neighborhood of defects reveals the extent of morphological changes.
Article
Physics, Multidisciplinary
Yantao Li, Adam Eaton, H. A. Fertig, Babak Seradjeh
Summary: We have discovered a new type of magic-angle phenomena when an AA-stacked graphene bilayer is twisted relative to another graphene system with band touching. At certain angles, multiple anisotropic Dirac cones coexist in the twisted multilayer structures, which we refer to as Dirac magic. The twist angle and perpendicular electric field can be used to tune the topological Lifshitz transitions induced by the anisotropy of the Dirac cones.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Xuejiao Gao, Hao Sun, Dong-Ho Kang, Chongwu Wang, Qi Jie Wang, Donguk Nam
Summary: By utilizing weak interlayer van der Waals bonding in twisted bilayer graphene devices, dynamically tunable heterostrain of up to 1.3% can be achieved, as confirmed by polarization-resolved Raman spectroscopy showing substantial heterostrain in graphene layers. Theoretical calculations reveal that heterostrain significantly alters the electronic structure of graphene, leading to the emergence of multiple absorption peaks.
SCIENTIFIC REPORTS
(2021)
Article
Nanoscience & Nanotechnology
M. Dragoman, A. Dinescu, D. Dragoman, Florin Comanescu
Summary: This study reports the fabrication and measurement of Bloch oscillations in electrostatic graphene/h-BN superlattices at room temperature, demonstrating miniband formation, negative differential resistance, and evidence of Bloch oscillations. The experimental results are supported by numerical modeling of 2D superlattices. A period of 55 meV for Bloch oscillations at room temperature was measured, corresponding to a frequency of 13 THz.
Article
Chemistry, Multidisciplinary
Peihui Li, Songjun Hou, Bader Alharbi, Qingqing Wu, Yijian Chen, Li Zhou, Tengyang Gao, Ruihao Li, Lan Yang, Xinyue Chang, Gang Dong, Xunshan Liu, Silvio Decurtins, Shi-Xia Liu, Wenjing Hong, Colin J. Lambert, Chuancheng Jia, Xuefeng Guo
Summary: Stacking interactions play a crucial role in determining the efficiency of charge transfer between molecules and their quantum states. Previous studies have shown that when two monomers are pi-stacked to form a dimer, the electrical conductance decreases significantly. However, recent research has demonstrated a rare case where the conductance actually increases when two anthanthrene monomers are pi-stacked to form a dimer, due to the presence of quantum interference.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Jun Li, Chaofeng Wang, Shuilin Wu, Zhenduo Cui, Yufeng Zheng, Zhaoyang Li, Hui Jiang, Shengli Zhu, Xiangmei Liu
Summary: Currently, developing a self-disinfecting coating on touchscreens has become an urgent and meaningful task due to the increased public attention toward the spread of pathogenic viruses and bacteria. In this study, a ZnO-Fe2O3 superlattice nanofilm with engineered electronic defects is designed via atomic layer deposition for photocatalytic bactericidal and virucidal touchscreen. The nanofilm exhibits high antibacterial and antiviral efficacy (>90%) against drug-resistant bacteria and H1N1 viruses under simulated solar or low-power LED light irradiation, while also demonstrating excellent light transmission (>90%), abrasion resistance, and biocompatibility on touchscreens.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhi-Bin Jian, Jie Bie, Shuang Chen
Summary: Confined ammonia molecules form a stable new rhomboidal phase in graphene oxide/graphene nanosheets, showing liquid-like behavior at room temperature and high stability requiring significant strain to destroy. These rhomboidal NH3 monolayers offer diverse hydrogen-bonded networks and potential piezoelectricity for future device applications.
Article
Physics, Multidisciplinary
Zheng Chen, Zhenyu Cheng, Liang Du, Yong Yang
Summary: In this study, the quantum size effects in multilayer graphene sheets were investigated using first principles methods within the framework of density functional theory. Four different types of functionals were adopted to describe the van der Waals interactions between graphene layer sheets. The results showed that the PBE functional could not well describe the van der Waals interactions, while the other three methods exhibited similar results indicating the stability of the layered graphene structure. The density of states at zero temperature indicated that multilayer graphene sheets were semi-metals independent of the number of layers. The finite temperature density of states demonstrated oscillating behavior between odd and even numbers of layers, revealing the presence of quantum size effects.
Article
Chemistry, Multidisciplinary
Ahrum Sohn, Changhyun Kim, Jae-Hwan Jung, Jung Hwa Kim, Kyung-Eun Byun, Yeonchoo Cho, Pin Zhao, Sang Won Kim, Minsu Seol, Zonghoon Lee, Sang-Woo Kim, Hyeon-Jin Shin
Summary: The phase-transition-induced growth (PTG) method successfully achieved the growth of one to eleven layers of MoS2 films on 2-inch wafers, with the ability to precisely control the number of layers and apply to heteroatom-inserted MoS2. Furthermore, analysis based on work functions revealed that the work function of MoS2 increases with the number of layers, with better electronic state modulation observed in thicker layers.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Da Luo, Myeonggi Choe, Rafael A. Bizao, Meihui Wang, Haisheng Su, Ming Huang, Sunghwan Jin, Yunqing Li, Minhyeok Kim, Nicola M. Pugno, Bin Ren, Zonghoon Lee, Rodney S. Ruoff
Summary: A single-crystal graphene film grown on a Cu(111) foil by chemical vapor deposition (CVD) exhibits ribbon-like fold structures, which provide insights into the fracture strength and compression behavior of graphene.
ADVANCED MATERIALS
(2022)
Article
Pharmacology & Pharmacy
Kimin Kim, Jungjae Park, Yehjoo Sohn, Chan-Eui Oh, Ji-Ho Park, Jong-Min Yuk, Ju-Hun Yeon
Summary: Plant-derived extracellular vesicles (EVs) have the ability to efficiently deliver various substances to mammalian cells and play a critical role in plant defense against pathogens. They show potential for industrial applications in food, cosmetic, and pharmaceutical products. However, little is known about the stability of plant-derived EVs under different storage conditions. This study evaluated the stability of Dendropanax morbifera leaf-derived extracellular vesicles (LEVs) and their formulations with preservatives under different storage temperatures. The results provide comprehensive information on the stability of LEVs and suggest the use of preservatives to broaden the potential industrial applications of plant-derived EVs.
Article
Materials Science, Multidisciplinary
Gwangwoo Kim, Seunguk Song, Deep Jariwala
Summary: This article provides an overview of recent advances in the growth of 2D quantum heterostructures, which enable the realization of controlled positions and dimensions for 2D lateral/vertical heterostructures while minimizing defects across the heterointerfaces.
MATERIALS RESEARCH LETTERS
(2023)
Article
Chemistry, Physical
Yujin Lee, Kangsik Kim, Zonghoon Lee, Hong-Sub Lee, Han-Bo-Ram Lee, Woo-Hee Kim, Il-Kwon Oh, Hyungjun Kim
Summary: In this study, Dy incorporation was used to stabilize HfO2 films and increase the grain size, which resulted in a reduction of leakage current density and an increase in breakdown strength. The properties of Dy-doped HfO2 thin films were characterized using various analysis techniques. The phase transformation of HfO2 films from different planes to a main m(-111) plane was observed through X-ray diffraction, indicating the role of Dy in stabilizing the film. The increase in grain size due to Dy incorporation was confirmed by electron microscopy.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jie Zhao, Asir Intisar Khan, Mikhail Y. Efremov, Zichao Ye, Xiangjin Wu, Kangsik Kim, Zonghoon Lee, H. -S. Philip Wong, Eric Pop, Leslie H. Allen
Summary: The phase transition of Sb2Te3/Ge2Sb2Te5 superlattices was studied using nanocalorimetry, providing insights into the thermodynamics of superlattice-based PCM and enabling low-power switching.
Article
Nanoscience & Nanotechnology
Yidi Shen, Sergey I. Morozov, Dulce C. Camacho-Mojica, Rodney S. Ruoff, Qi An, William A. Goddard
Summary: Ruoff and co-workers have demonstrated low-temperature homoepitaxial diamond growth from liquid gallium solvent. In this study, the researchers used density functional theory-based molecular dynamics simulations to investigate the mechanism of single-crystal diamond growth on different low-index crystallographic diamond surfaces in liquid Ga. They found that carbon linear chains form in liquid Ga and react with the growing diamond surface, resulting in the formation of carbon rings and initiation of diamond growth. The simulations showed faster growth on the (110) surface compared to the (100) or (111) surfaces, suggesting the (110) surface as a plausible growth surface in liquid Ga. The addition of Si into liquid Ga was also found to significantly increase the rate of dehydrogenating the growing surface, providing insights for optimizing low-temperature diamond growth.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Yunfei He, Shangyi Chen, Merrilyn Mercy Adzo Fiagbenu, Chloe Leblanc, Pariasadat Musavigharavi, Gwangwoo Kim, Xingyu Du, Jiazheng Chen, Xiwen Liu, Eric A. Stach, Roy H. Olsson, Deep Jariwala
Summary: This letter presents the oriented growth and switching of thin ferroelectric aluminum scandium nitride (AlScN) films directly on degenerately doped 4H silicon carbide (SiC) wafers. The high-quality thin Al0.68Sc0.32N films on doped SiC substrates enable the monolithic integration of nonvolatile memory with SiC-based logic devices suitable for high temperature operation as well as high-power switching, memory, and sensing applications.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Guangwu Yang, Hao Liu, Madi Arsakay, Jingshun Shen, Yanfeng Shen, Alisher Fatkhulloev, Rodney S. Ruoff
Summary: We achieved the synthesis of an ordered 3D microporous graphene architecture via chemical vapor deposition using zeolite as the template. The introduction of Ca2+ effectively catalyzed the growth of ZTC and reduced the growth temperature. Various synthetic parameters were investigated to improve the ZTC growth, resulting in high-quality samples with continuous single-layer carbon structures.
Article
Chemistry, Physical
Onur Buyukcakir, Recep Yuksel, Ferit Begar, Mustafa Erdogmus, Madi Arsakay, Sun Hwa Lee, Sang Ouk Kim, Rodney S. S. Ruoff
Summary: We synthesized and studied a redox-active quinone-based porous organic polymer (rPOP) with ultralong cycle life, making it a promising organic cathode for aqueous zinc-ion batteries. rPOP's high physicochemical stability and enhanced intrinsic conductivity from its fused-aromatic conjugated skeleton contribute to its efficient utilization of redox-active quinone units. It has a specific capacity of 120 mAh g(-1) and provides ultralong cycle life with initial capacity retention of 95% and 66% at current densities of 1.0 A g(-1) for 1000 cycles and 2.0 A g(-1) for 30,000 cycles, respectively. The co-insertion charge storage mechanism of Zn2+ and H+ was investigated and explained, contributing to a better understanding of the structure-property relationship for rPOP and the development of new organic cathode materials for high-performance aqueous batteries.
ACS APPLIED ENERGY MATERIALS
(2023)
Meeting Abstract
Oncology
Justine Habault, Jeffrey A. Schneider, Susan Ha, Rachel Ruoff, Joseph Puccini, Dafna Bar-Sagi, Kwok-Kin Wong, Amina Zoubeidi, Frank Claessens, David R. Wise, Susan K. Logan, Kent Kirshenbaum, Michael J. Garabedian
Article
Polymer Science
Jae Hong Seo, Hyun Ju Nam, Onur Buyukcakir, Rajmohan Rajendiran, Won Kyung Seong, Yi Jiang, Min Hyeok Kim, Sun Hwa Lee, Rodney S. Ruoff
Summary: The study presents a continuous production method of polyhydrocarbon (PHC) through electrochemical polymerization of chlorinated hydrocarbons. Various parameters such as reaction time, cell configuration, molar ratio of input chemicals, and solvent type can be adjusted to control the polymerization. The research demonstrates the possibility of producing sufficient amounts of product continuously and characterizing the product using various methods. Additionally, a new pathway for synthesizing hyperbranched PHCs through electrochemical polymerization was discovered through C-13 NMR techniques.
Article
Polymer Science
Sun Hwa Lee, Jae Hong Seo, Eunhye Shin, Se Hun Joo, Onur Buyukcakir, Yi Jiang, Minhyeok Kim, Hyunju Nam, Sang Kyu Kwak, Rodney S. Ruoff
Summary: We describe a method for structural analysis of a hyperbranched polyhydrocarbon (PHC) synthesized by electrochemical polymerization. Experimental techniques including NMR, elemental analysis and FTIR were used to determine the polymer's structure, and a simulated structure was also developed. The results showed good agreement between the experimental and simulated values for density, refractive index, melting temperature, and IR spectrum. The calculated solubility parameters rationalized the observed solubility in different solvents at room temperature. This comprehensive elucidation of the structure of a randomly branched polymer using experimental and theoretical methods is a significant contribution and has potential for wide application in the future.
Article
Chemistry, Multidisciplinary
Siraj Sultan, Hojeong Lee, Sojung Park, Minho M. Kim, Aram Yoon, Hansaem Choi, Tae-Hoon Kong, Young-Jin Koe, Hyung-Suk Oh, Zonghoon Lee, Hyungjun Kim, Wooyul Kim, Youngkook Kwon
Summary: In this study, a newly designed electrocatalyst with phase and interphase engineering achieves high selectivity for the electrochemical reduction of carbon dioxide to ethylene. The catalyst shows good catalytic stability and material durability.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Hye Jin Cho, Dong Yeun Jeong, Hwihyun Moon, Taewoo Kim, You Kyoung Chung, Yeongdong Lee, Zonghoon Lee, Joonsuk Huh, Youngmin You, Changsik Song
Summary: Understanding the molecular arrangement of chiral supramolecular polymers is crucial for comprehending complex superstructures and developing next-generation optoelectronic materials. In this study, the researchers reported the first chiral supramolecular polymer systems based on hydrazone-pyridinium conjugates, which allowed control of supramolecular chirality. By controlling aggregation conditions and adding water, the researchers achieved helicity inversion and a different self-assembly behavior. The co-assembly of an achiral hydrazone luminophore with the supramolecular polymer system resulted in a novel CPL-active hydrazone-based material with high photoluminescence dissymmetry factor.
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.
