Article
Chemistry, Analytical
J. S. Arya Nair, S. Saisree, R. Aswathi, K. Y. Sandhya
Summary: A graphene-molybdenum disulphide nanocomposite (pGr-MoS2) with ultra-selective electrochemical sensing towards dopamine (DA) was successfully synthesized by a hydrothermal method, showing current response only for DA in the presence of various biomolecules.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Multidisciplinary Sciences
Lihuan Sun, Louk Rademaker, Diego Mauro, Alessandro Scarfato, Arpad Pasztor, Ignacio Gutierrez-Lezama, Zhe Wang, Jose Martinez-Castro, Alberto F. Morpurgo, Christoph Renner
Summary: This study uses scanning tunneling microscopy to image backscattering in graphene/tungsten selenide heterostructures and quantitatively determine the strength of spin-orbit coupling (SOC). The results show that the strength of SOC is one order of magnitude larger than what theory predicted, but in agreement with previous transport experiments.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yun Ni, Jia Li, Wei Tao, Hao Ding, Rui-Xue Li
Summary: This paper studied the transport properties of defected ZGNR with a graphene nanobubble through first-principles quantum transport calculations. When the nanobubble is intact and located at the center, the spin polarization and magnetoresistance tend to decrease at low bias voltages, while when the nanobubble is split and located at the edge, all transport properties are significantly affected and altered. New results obtained from the device include the negative differential resistance effect and the pure thermal-induced spin-current.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Liwen Zhang, Jun Chen, Lei Zhang, Fuming Xu, Liantuan Xiao, Suotang Jia
Summary: Graphene with micrometer spin relaxation length presents promising potential in spintronics, but efficient spin injection remains a challenge. Generating spin current in ZGNR via photogalvanic effect provides a novel approach to achieve spin injection without accompanying charge current, and the spin current generation and polarization can be controlled through a dual gate system.
Article
Nanoscience & Nanotechnology
Talieh S. Ghiasi, Alexey A. Kaverzin, Avalon H. Dismukes, Dennis K. de Wal, Xavier Roy, Bart J. van Wees
Summary: The coupling of bilayer graphene with the 2D interlayer antiferromagnetic CrSBr enables the active generation of spin currents in graphene, benefiting ultracompact spintronic devices. The strong spin-charge coupling in graphene and the high sensitivity of spin transport to the adjacent antiferromagnet's magnetization allow for the read-out of a single magnetic sublattice.
NATURE NANOTECHNOLOGY
(2021)
Article
Chemistry, Physical
Amir Abdolazizi, Su Chen, Dmitri Golberg, Cheng Yan
Summary: This paper investigates the deformation and failure behavior of graphene, hBN, and MoS2 nanosheets under tension using molecular dynamics simulations. The study highlights the contribution of 'critical bonds' to fracture strength, which explains the observed anisotropy in graphene and hBN. Different mechanical behavior is observed in MoS2 compared to graphene and hBN. The effects of atomic defects on strength are also compared to classic fracture mechanics theory.
Article
Materials Science, Multidisciplinary
Sonam Rani, Love Bansal, Manushree Tanwar, Ravi Bhatia, Rajesh Kumar, I. Sameera
Summary: A method to tune the electrochemical energy storage properties of molybdenum disulfide (MoS2) nanoflowers has been explored. The MoS2 nanoflowers were synthesized through a hydrothermal route using ammonium heptamolybdate tetrahydrate (AHM) and thiourea (TU) as precursors. The petal density, thickness, and porosity of the nanoflowers were found to vary with the precursor weight ratio. By adjusting the electrolyte concentration to 1 M Na2SO4, the electrochemical properties of the MoS2 nanoflowers were improved. NaClO4 electrolyte was found to provide a larger potential window compared to Na2SO4, making it a suitable electrolyte for high energy density solid-state supercapacitor applications.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Thermodynamics
Ali Raza, Sami Ullah Khan, M. Ijaz Khan, Saadia Farid, Taseer Muhammad, M. Imran Khan, Ahmed M. Galal
Summary: This study investigates the mixed free convection Casson nanofluid over a vertical plate with heat transfer effects, considering thermal radiative phenomenon. Thermal enhancement is predicted using engine oil with graphene oxide and molybdenum disulphide nanoparticles. Fractional model is constructed using Atangana-Baleanu and Caputo-Fabrizio time-fractional derivatives, showing stable simulations with AB-time fractional approach. Velocity profile decreases with increasing fractional parameters, while Grashof number results in an increased change in velocity. Nanoparticles temperature remains relatively stable due to volume fraction coefficient.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
A-Rang Jang
Summary: This study investigates the effect of electrodes on the electrical properties of single-layer MoS2 field-effect transistors (FETs). The contact barrier at the MoS2-graphene interface can be modulated, resulting in enhanced performance compared to FETs with Au/Ti electrodes.
Article
Physics, Applied
Peina Zhang, Xinlu Li, Jianting Dong, Meng Zhu, Fanxing Zheng, Jia Zhang
Summary: Carbon-based magnetic nanostructures have long spin coherent length and potential applications in spintronics. Recent experiments demonstrate that a pair of substitutional boron atoms doped graphene nanoribbons exhibit intrinsic magnetism. In this work, the magnetism is found to be contributed by pi-electrons and the spin-dependent transport properties are investigated.
APPLIED PHYSICS LETTERS
(2022)
Review
Energy & Fuels
Komal B. Pisal, Bapuso M. Babar, Sarfraj H. Mujawar, Laxman D. Kadam
Summary: Transition metal dichalcogenides (TMDs) have attracted significant attention in the field of supercapacitors due to their unique properties. This review focuses on the synthesis approaches and supercapacitive performance of MoS2 based electrodes, as well as the development of MoS2-based nanocomposites in electrochemical energy storage. Future perspectives and challenges faced by MoS2 electrodes are also discussed in this review.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Physics, Applied
Suryakant Mishra, Luca Pasquali, Claudio Fontanesi
Summary: This Letter presents an original spin valve device based on chiral templated nickel material, inducing chirality in Ni by co-electrodeposition of an organic chiral template, using enantiopure tartaric acid as the template. The Z-shaped magnetoresistance curves switch sign based on the handedness of the chiral compound, demonstrating a peculiar ferromagnetic character induced by the presence of chirality.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Erik Piatti, Jessica Montagna Bozzone, Dario Daghero
Summary: Transition metal dichalcogenides exhibit rich phase diagrams dominated by the interplay of superconductivity and charge density waves. In this study, we demonstrate the tunable, non-volatile organic ion intercalation in MoS2 and its influence on the electronic ground state. The observed anomalies in the transport properties suggest the competition between charge-density wave phase and superconductivity.
Article
Chemistry, Physical
Shuaishuai Ding, Yuan Tian, Xiang Liu, Ye Zou, Huanli Dong, Wenbo Mi, Wenping Hu
Summary: This study highlights the significant role of Fe(3)O(4) electrode in Fe3O4/P3HT/Co polymer spin valves, particularly near the Verwey transition temperature. The first-order metal-insulator transition in Fe(3)O(4) has a dramatic effect on the magnetoresistance enhancement of polymer spin valves.
Article
Materials Science, Multidisciplinary
Jiansheng Qi, Yuanyuan Miao, Yangjun Cui, Shuai Qiu, Jinming Zhao, Guangping Zhang, Junfeng Ren, Chuankui Wang, Guichao Hu
Summary: Using first-principles method, an unusual length effect in polyacene molecular spin valves is revealed, where the tunneling magnetoresistance is significantly enhanced beyond a critical length. Theoretical analysis shows that this increase is related to the nonmagnetic-antiferromagnetic phase transition of polyacene molecules, with the molecular gap showing distinct length dependence and changing with the molecular magnetic state.
RESULTS IN PHYSICS
(2021)
Review
Materials Science, Multidisciplinary
Junmin Xia, Chao Liang, Hao Gu, Shiliang Mei, Shengwen Li, Nan Zhang, Shi Chen, Yongqing Cai, Guichuan Xing
Summary: Metal halide perovskites are popular for efficient photovoltaic devices, but defects from the preparation process hinder performance improvement. Surface passivation is a practical approach to suppress these defects, and this review provides a comprehensive summary of different passivation methods and discusses future research trends.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kangdi Niu, Guotao Qiu, Chuanshou Wang, Daiyue Li, Yutao Niu, Songge Li, Lixing Kang, Yongqing Cai, Mengjiao Han, Junhao Lin
Summary: This study focuses on 2D magnetic heterojunctions which have attracted considerable interest due to their potential applications in spintronics. By using CrTe2 as the backbone framework and self-intercalated 2D chromium telluride (CrxTey), the researchers obtained various lateral and vertical magnetic heterojunctions. They demonstrated a Cr2Te3-Cr5Te8 lateral heterojunction prototype that can manipulate magnetic moments under different magnitudes of magnetic excitation, showing a sharply stepped hysteresis loop with a dual spin-flip transition at high Curie temperatures up to 150 and 210 K by magneto-optical Kerr measurement. The overall structural rigidity of chromium-telluride heterostructure with magnetic phase decoupled behaviors is promising for 2D spintronic devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lu Wang, Zhenxing Wang, Huan Li, Daliang Han, Xing Li, Feifei Wang, Jiachen Gao, Chuannan Geng, Zhicheng Zhang, Changjun Cui, Zhe Weng, Chunpeng Yang, Kian Ping Loh, Quan-Hong Yang
Summary: The deposition behavior of Zn metal anodes in aqueous Zn batteries can be regulated using an aminosilane molecular layer, resulting in dendrite-free Zn metal anodes. This is achieved through a capture-diffusion-deposition process of Zn ions, induced by the aminosilane molecular layer, which promotes reversible Zn stripping/plating and leads to smooth and compact Zn electrodeposited layers. The aminosilane-modified Zn anode exhibits high Coulombic efficiency, long lifespan, and high capacity retention in full cells, making it a promising solution for practical Zn batteries and providing insights into interface modification for other metallic anodes at the molecular level.
Article
Chemistry, Multidisciplinary
Kun Zhang, Xing Li, Li Ma, Fangzheng Chen, Zhongxin Chen, Yijia Yuan, Yaohua Zhao, Jinlin Yang, Jia Liu, Keyu Xie, Kian Ping Loh
Summary: To achieve practical application of lithium-sulfur (Li-S) batteries, the focus is on inhibiting uncontrolled Li deposition and preventing polysulfide shuttling. This study presents the design and synthesis of a fluorinated covalent organic framework (4F-COF)-based membrane that offers high permselectivity and extended battery lifespan. By eliminating polysulfide shuttling and dendritic lithium formation, the 4F-COF/PP separator enables stable Li plating/stripping behaviors and demonstrates excellent cycling retention, rate performance, and areal capacity.
Article
Chemistry, Multidisciplinary
Kun Zhang, Xing Li, Yong Yang, Zhongxin Chen, Li Ma, Yaohua Zhao, Yijia Yuan, Fangzheng Chen, Xiaowei Wang, Keyu Xie, Kian Ping Loh
Summary: Simultaneously achieving high gravimetric energy density (E-g) and volumetric energy density (E-v) in practical Li-S batteries is a longstanding challenge. In this study, anthraquinone-containing polymer tubes (PQT) were designed and prepared to regulate the redox chemistry of sulfur species. The PQT/S cathode exhibited stable cycling capacity, remarkable rate performance, and high areal capacity under lean electrolyte condition. The assembled Li-S pouch cell met the requirement for practical operation with high E-g and E-v.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zehong Chen, Xinwen Peng, Zhongxin Chen, Tingzhen Li, Ren Zou, Ge Shi, Yongfa Huang, Peng Cui, Jian Yu, Yuling Chen, Xiao Chi, Kian Ping Loh, Zhaoqing Liu, Xuehui Li, Linxin Zhong, Jun Lu
Summary: The by-product of the papermaking industry, lignosulfonate, is used as a bioligand to produce single-atom catalysts (SACs) with highly active M-N-4-S sites (M represents Fe, Cu, and Co) through metal-nitrogen/sulfur coordination. This study demonstrates that the SACs produced have excellent catalytic performance in oxygen reduction and evolution reactions for Zn-air batteries, paving the way for the industrial production of cost-effective SACs in a sustainable manner.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Dapeng Huang, Fei Liang, Ruiqi Guo, Dazhi Lu, Jiyang Wang, Haohai Yu, Huaijin Zhang
Summary: In this study, the broadband self-trapped exciton (STE) states are demonstrated for the first time in Mo-vacancy-rich MoSi2N4 films. The modulation effect of STE states on nonlinear optical processes is verified, which opens up new possibilities for the construction of novel devices and practical applications.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Jiayang Wu, Han Lin, David J. Moss, Kian Ping Loh, Baohua Jia
Summary: Graphene oxide (GO) was initially developed as a graphene mimic, but has since been recognized as a functional material with its own unique properties. Research on GO in the past decade has greatly advanced material synthesis and property tailoring, leading to rapid progress in GO-based photonics, electronics, and optoelectronics. This review provides an overview of the optical, electrical, and optoelectronic properties of GO and reduced GO, as well as their applications in key technologies such as solar energy harvesting, energy storage, medical diagnosis, image display, and optical communications. The challenges and exciting opportunities for future technological advances in this field are also discussed.
NATURE REVIEWS CHEMISTRY
(2023)
Article
Physics, Applied
Wei Wei, Ming Gao, Zhiyong Wang, Yong-Wei Zhang, Zhi Gen Yu, Wai Kin Chim, Chunxiang Zhu
Summary: Alloying CuI with CuBr is proposed to reduce the hole concentration in CuIBr alloy, leading to an increased on/off current ratio for CuIBr TFT devices. The CuIBr TFT with 7.5% Br content exhibits a high hole mobility of larger than 5 cm(2) V-1 s(-1) and a high on/off current ratio of 10^4, which enables the development of inorganic-based CMOS circuits on flexible and transparent substrates.
APPLIED PHYSICS LETTERS
(2023)
Article
Construction & Building Technology
Xing Ming, Yunjian Li, Qing Liu, Miaomiao Wang, Yongqing Cai, Binmeng Chen, Zongjin Li
Summary: Understanding hydration kinetics and chloride interactions of cement components is crucial for designing durable cement-based materials. This study investigated the behavior of tricalcium aluminate (C3A), the most reactive component of ordinary Portland cement, in terms of hydration kinetics, chloride binding, and phase assemblage. The findings reveal that chloride ions can affect the formation of different hydrated phases and the presence of calcium ions can regulate the crystal structure. Additionally, carbonation process can deteriorate chloride binding capacity. These findings provide guidance for corrosion protection design of cement-based materials.
CEMENT & CONCRETE COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Weixin He, Yali Yang, Chuanzhao Li, Walter P. D. Wong, Fanica Cimpoesu, Ana Maria Toader, Zhenyue Wu, Xiao Wu, Zexin Lin, Qing-hua Xu, Kai Leng, Alessandro Stroppa, Kian Ping Loh
Summary: It is discovered that the polar axis in ferroelectric 2D Dion-Jacobson (DJ) perovskites can be tuned from the out-of-plane (OOP) to the in-plane (IP) direction by substituting the iodide with bromide in the lead halide layer.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Liang-Xing Lu, Hao Jiang, Qin Bian, Wenzhu Shao, Liyi Li, Yong -Wei Zhang, Bo Liang, YuSheng Shi, Liang Zhen
Summary: In-depth understanding of the layer-by-layer process is crucial for quality control of AM components. Computational modelling is an important method to study the mechanisms of AM process, but lacks an integrated platform. In this study, we develop a modelling framework that combines different methods and algorithms to simulate the PBF process of NiTi shape memory alloy. Our simulation reveals the factors determining laser absorptivity and we also propose an analytical model to predict keyhole depth and absorptivity. This work provides a solid foundation for quantitative understanding of multi-layer AM process.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Inorganic & Nuclear
Qun Li, Wenyu Zhou, Chunyan Deng, Chenyang Lu, Peng Huang, Dong Xia, Luxi Tan, Cailong Zhou, Yong-Wei Zhang, Lichun Dong
Summary: This study introduces hydroxyl groups onto the surface of Pt catalysts to overcome the challenges posed by environmental water in catalytic oxidation reactions. The presence of hydroxyl groups on the Pt catalysts enhances their catalytic activity and water resistance. Theoretical calculations reveal that the presence of hydroxyl groups modulates the d-band structure, improving the adsorption and activation of reactants.
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Mechanical
Wanghui Li, Shuai Chen, Zachary Aitken, Yong -Wei Zhang
Summary: This study systematically investigates the shock-induced deformation and fracture behavior of single-crystalline and nanocrystalline CoCrFeMnNi high-entropy alloys (HEAs) under different shock intensities using large-scale molecular dynamics simulations. The research reveals the strong anisotropy in single-crystalline HEAs and how the reversibility of HCP-structured atoms affects void nucleation and growth. Additionally, the study analyzes the effects of SRO and chemical heterogeneity on the shock response in CoCrFeMnNi HEAs. The comprehensive and systematical findings provide deep insights into the deformation and fracture mechanisms and contribute to the rational design of new HEAs/MEAs with enhanced performance.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Qing-Xiang Pei, Wanghui Li, Zachary H. Aitken, Ping Liu, Yong-Wei Zhang
Summary: This study investigates the impact performance of AlCoCuFeNi HEA/graphene composites using molecular dynamics simulations and finds that graphene can enhance the impact properties of the HEA. The enhancement is mainly attributed to the strong load carrying ability of graphene, although it can also have a negative effect on the impact force of HEA by breaking the structure continuity. Moreover, graphene significantly affects the stress distribution and dislocation behavior at the HEA/graphene interface during the impact process.
JOURNAL OF MATERIALS SCIENCE
(2023)