Article
Materials Science, Paper & Wood
Yanfei Pan, Mayin Dai, Xin Zheng, Lei Yun, Fengqi Qiu, Dongbo Yang, Caiyi Deng, Qiang Guo, Jintian Huang
Summary: This research aims to optimize the comprehensive performance of wood-based electromagnetic shielding materials and study the effect of heat treatment on its coating density, interfacial morphology, conductivity, hydrophobicity, and electromagnetic shielding. The results showed that the surface roughness of the composite coatings was 11.0 μm when the wood was treated with electroless two deposition of copper and one deposition of nickel, followed by heat treatment at 150 degrees Celsius. With increasing temperature, the surface of the composite coating became more uniform. The thickness of the coating after heat treatment at 120 degrees Celsius was 97.5 μm. Energy Dispersive Spectroscopy (EDS) confirmed the presence of copper and nickel particles. Heat treatment significantly affected the conductivity of the composite materials and the pore network structure. The contact angle of the composite materials reached 119 degrees. The average electromagnetic shielding efficiency after heat treatment at 180 degrees Celsius was up to 91.4 dB in the frequency range of 300 to 3.0 GHz, demonstrating that the composite materials can shield 99.99% of the incident electromagnetic wave energy. The conductivity gradient structure can achieve multi-dielectric interface loss and multiple reflection loss.
Article
Polymer Science
Mingwei Tang, Xueren Fang, Bowen Li, Meng Xu, Haiyan Wang, Shuang Cai
Summary: A facile strategy for fabricating hydrophobic and anti-fouling surfaces on wood substrates is developed in this work. The modified wood shows good hydrophobicity and anti-fouling properties, as well as UV resistance and durability against tape peel test and finger wiping.
Article
Green & Sustainable Science & Technology
L. Wang, X. Zhang, X. Wang, J. Yu
Summary: By adding reduced graphene oxide (rGO) into the wood matrix, conductive wood with both natural wood features and high electrical conductivity has been successfully fabricated. It exhibits low bulk density and outstanding electrical conductivity, making it a versatile conductor in various applications such as electromagnetic shielding and wave absorbing materials.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Polymer Science
Yanfei Pan, Qiang Guo, Dingwen Yin, Mayin Dai, Xiaofang Yu, Yinan Hao, Jintian Huang
Summary: The properties of wood-based Cu-Ni composites were modified using a simple electroless Cu and Ni method on the wood surface, resulting in multilayer composites with enhanced performance. The composite coatings achieved good surface roughness and hydrophobic performance, with Cu and Ni particles closely distributed and embedded within the wood substrate. The electrical conductivity and hydrophobicity of the composites were influenced by the electroless Ni deposition time, affecting the overall performance of the materials.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Wei Ni, Zhou Yixiang, Yebo Yao, Xiaoxuan Wang, Rui Zhao, Zhiyu Yang, Xin Li, Yi-Ming Yan
Summary: This study presents a catalyst model with a sandwich-like structure that effectively inhibits surface reconstruction under highly reducing conditions, leading to improved efficiency and selectivity in the electroreduction of carbon dioxide.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Xiaoman Xiong, Mohanapriya Venkataraman, Tao Yang, Jiri Militky, Jakub Wiener
Summary: This paper presents the preparation of microporous materials made of aerogel and polytetrafluoroethylene (PTFE) using the needleless electrospray technique. By adjusting the content of aerogel powders, the structural characteristics and various properties of the materials can be modified. The electrosprayed materials showed increased surface roughness and improved hydrophobicity, indicating excellent thermal insulation performance.
Article
Chemistry, Analytical
Hong Yuan, Subin Yu, Minju Kim, Ji-Eun Lee, Haeun Kang, Dohyub Jang, Madeshwaran Sekkarapatti Ramasamy, Dong Ha Kim
Summary: This study presents a novel approach for achieving high-performance SERS substrates based on anisotropic hybrid plasmonic nanostructures of gold nanoworms and 2D molybdenum disulfide nanosheets. By optimizing the gap between gold nanoworms and molybdenum disulfide, significant enhancement in SERS enhancement factor was achieved, generating abundant hot spots. This work provides new insights into the rational design of high-performance SERS substrates and has potential for practical and viable biosensing applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Physical
Mu-lan Li, Liang Zhang, Li-li Gao, Xi Wang, Chen Chen, Xiao Lu
Summary: Cu/Sn/Cu and Cu/Sn-0.6SiC/Cu structures were fabricated by transient liquid phase bonding. The growth of inter-metallic compounds (IMC) was observed in both structures, with the IMCs forming and growing as the bonding time increased. The growth rate of IMCs in the Cu/Sn-0.6SiC/Cu structure was smaller than that in the Cu/Sn/Cu structure. After a certain bonding time, the Cu/Sn/Cu structure was composed entirely of IMCs, while the Cu/Sn-0.6SiC/Cu structure still contained residual Sn. The introduction of SiC nanowires impeded the growth of IMCs and improved the shear strength of the composite solder.
Review
Chemistry, Physical
Grigoria Athanasaki, Arunkumar Jayakumar, A. M. Kannan
Summary: This study investigates the Gas Diffusion Layer (GDL) in proton exchange membrane fuel cell (PEMFC) stacks, emphasizing its significant role in performance, durability, and dynamic characteristics. The manufacturing techniques of GDL are also reviewed. It is suggested that additive manufacturing can be a cost-effective and simple approach for GDL fabrication.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Ting Liang, Biao Wang, Zhenzhong Fan, Qingwang Liu
Summary: CeO2 was synthesized on Cu mesh substrate by co-precipitation and modified with stearic acid (SA) to achieve superhydrophobic behavior. The modified mesh showed excellent durability, acid and base stability, and high separation efficiency, reaching up to 98.0% after 30 separation cycles.
Article
Chemistry, Physical
Zhen Tong, Alessandro Pecchia, ChiYung Yam, Liujiang Zhou, Traian Dumitrica, Thomas Frauenheim
Summary: Beryllium polynitride (BeN4), synthesized under high-pressure conditions, exhibits an anisotropic lattice structure and thermal conductivity. The bonding anisotropy and bonding anharmonicity contribute to the anisotropic behavior in both phononic and electronic components of its thermal conductivity. The pressure-driven evolution of the interlayer bonding also plays a significant role in the interlayer thermal conductivity.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Forestry
Zhenyu Sun, Jianxiong Lv, Zhangheng Wang, Yiqiang Wu, Guangming Yuan, Yingfeng Zuo
Summary: The study found that using environmentally friendly modifiers and multi-step impregnation method to modify Chinese fir can improve its mechanical properties and water resistance, laying the foundation for its use as a high-performance wooden material.
WOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Thermodynamics
Boyan Tian, Jun Wang, Gaole Dai, Xiaoping Ouyang, Jiping Huang
Summary: This study introduces a generalized EMT to predict the effective thermal conductivities of heterogeneous systems with elliptical inclusions, enabling the design of thermal invisibility and Janus thermal illusion by tuning the orientations of particles. It aims to clarify the scopes of the generalized Maxwell-Garnett and Bruggeman theory, providing a promising fundamental framework and application prototype for thermal metadevices with asymmetry, irregularity, or anisotropy.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Materials Science, Paper & Wood
Yanfei Pan, Shuaiqi Hu, Xin Zheng, Nianguang Hu, Fengqi Qiu, Mayin Dai, Qiang Guo, Xiaofang Yu, Yinan Hao, Minyan Lv, Jintian Huang
Summary: Three-dimensional hydrophobic and efficient electromagnetic shielding Cu/wood/Cu laminated composites were prepared using a simple electroless Cu process. The conductivity, water contact angle, and electromagnetic shielding effectiveness of the composite were analyzed by varying the number and treatment time of electroless Cu on the wood surface. The Cu/wood/Cu laminated composites demonstrated high conductivity, hydrophobic properties, and excellent electromagnetic shielding effectiveness.
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Sheng Xue, Tingwei Zhang, Xiaokai Wang, Qinhua Zhang, Siyang Huang, Liwei Zhang, Liyu Zhang, Wenjie Zhu, Yin Wang, Mingbo Wu, Qingshan Zhao, Peifeng Li, Wenting Wu
Summary: Enzyme-mimicking nanomaterials for antioxidative therapy show promise in treating various diseases by scavenging excessive ROS. The biocompatible CuZn-CDs exhibit catalase and superoxide dismutase activities, protecting cardiomyocytes from ROS-induced damage and reducing heart ischemia-reperfusion injury. Their rapid renal clearance and low toxicity suggest high biocompatibility for clinical applications.
Article
Nanoscience & Nanotechnology
Bin Tang, Sabir Hussain, Rui Xu, Zhihai Cheng, Jianhui Liao, Qing Chen
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Pengfei Yang, Shuqing Zhang, Shuangyuan Pan, Bin Tang, Yu Liang, Xiaoxu Zhao, Zhepeng Zhang, Jianping Shi, Yahuan Huan, Yuping Shi, Stephen John Pennycook, Zefeng Ren, Guanhua Zhang, Qing Chen, Xiaolong Zou, Zhongfan Liu, Yanfeng Zhang
Article
Chemistry, Physical
Yanqing Zhao, Yan Sun, Mengmeng Bai, Shuting Xu, Han-Chun Wu, Junfeng Han, Hongxing Yin, Chong Guo, Qing Chen, Yang Chai, Yao Guo
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Nanoscience & Nanotechnology
Fengjiao Lyu, Yuanwei Sun, Qin Yang, Bin Tang, Mingqiang Li, Zhiwei Li, Mei Sun, Peng Gao, Lin-Hui Ye, Qing Chen
Article
Nanoscience & Nanotechnology
Xinzhe Wang, Dong Pan, Mei Sun, Fengjiao Lyu, Jianhua Zhao, Qing Chen
Summary: This study demonstrates a new type of photodetector based on InAs nanosheets, which shows high optoelectronic response in the ultraviolet-infrared band at room temperature. In addition, the InAs nanosheet devices exhibit negative photoconductivity for the first time, showing potential applications in nano-optoelectronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Fengjiao Lyu, Xuan Li, Jiamin Tian, Zhiwei Li, Bo Liu, Qing Chen
Summary: In this study, the temperature-driven phase transformation behavior and the effect of annealing on the electronic properties of thin layered indium selenide were investigated. The results showed that annealing at different temperatures could induce phase transformation and improve the electrical performance and stability of the nanodevices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Fengjiao Lyu, Bin Tang, Xuan Li, Qing Chen
Summary: This article introduces a non-destructive, efficient, and widely applicable method for preparing TEM samples of exfoliated 2D materials. The method avoids the use of acids and alkalis, minimizing impurities and damage. It is also highly efficient, with a short processing time.
Article
Microscopy
H. L. Robert, I Lobato, F. J. Lyu, Q. Chen, S. Van Aert, D. Van Dyck, K. Mueller-Caspary
Summary: This study investigates scattering dynamics in crystals using momentum-resolved scanning transmission electron microscopy under varying illumination conditions. The research shows that different signals have different optimum focus points, with the second moment of the diffracted intensity exhibiting a contrast maximum when the electron probe is focused at the top and bottom faces of the specimen. Both analytical and dynamical simulations reveal a logarithmic divergence with increasing scattering angle.
Article
Nanoscience & Nanotechnology
Xuan Li, Shuo Li, Bin Tang, Jianhui Liao, Qing Chen
Summary: Neuromorphic visual sensory and memory systems have the potential to be used in image recognition and autonomous driving. However, current artificial neuromorphic vision technology faces challenges such as high power consumption, complex circuitry, and difficulties in miniaturization. This study presents a photonic neuromorphic device based on WSe2/In2Se3 van der Waals heterostructure that demonstrates light-tunable synaptic functions across a wide range of wavelengths. The device also exhibits low power consumption comparable to biological synapses.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zheng Fang, Zhaohe Dai, Bingjie Wang, Zhongzheng Tian, Chuanli Yu, Qing Chen, Xianlong Wei
Summary: This study investigates the elastic and adhesive properties of graphene and MoS2 films through in situ pull-to-peel experiments in a scanning electron microscope. Results show simultaneous determination of Young's moduli and adhesions to gold substrates, providing valuable insights for the design of nanoscale force sensors or other thin-film systems.
Article
Chemistry, Physical
Rui Shen, Yifan Jiang, Zhiwei Li, Jiamin Tian, Shuo Li, Tong Li, Qing Chen
Summary: Optical synapse is an essential component for optical neuromorphic computing and has great potential in various fields. This study demonstrates a near-infrared optical synapse based on a P(VDF-TrFE)-coated InAs nanowire field-effect transistor, showing optical synaptic behaviors in response to NIR light pulses. These findings have significant implications for the development of artificial neural networks.
Article
Chemistry, Multidisciplinary
Jiamin Tian, Mei Sun, Mengyu Hong, Bocheng Yu, Menglan Li, Yu Geng, Shuo Li, Yue Zhang, Zhihong Li, Qing Chen
Summary: The wet chemical etching process of zinc oxide (ZnO) nanowires in radiolytic water was studied using liquid cell transmission electron microscopy (LCTEM). It was found that the dissolution rate of thin nanowires remains constant with reducing diameter, while thick nanowires exhibit complex etching behaviors. The dissolution rate of thick nanowires is constant at first and then increases, and anisotropic etching occurs at both ends of thick nanowires leading to the formation of distinct tips. The polarity difference at the two ends of the nanowire and the arrangement of sidewall cones determine the shape and formation process of the tips.
Article
Engineering, Electrical & Electronic
Rui Shen, Yifan Jiang, Xuan Li, Jiamin Tian, Shuo Li, Tong Li, Qing Chen
Summary: This study demonstrates a method to improve the performance of InAs NW field-effect transistors by passivating the NW surface with a ferroelectric polymer, and observes synaptic behavior for the first time. By successfully simulating synaptic functions, this approach can achieve low-power, high-speed, and biomimetic plasticity artificial synapses.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yifan Jiang, Rui Shen, Tong Li, Jiamin Tian, Shuo Li, Hark Hoe Tan, Chennupati Jagadish, Qing Chen
Summary: This study systematically investigates the effect of Y2O3 coating on the performance of InAs NW FETs. The Y2O3 coating can reduce hysteresis, subthreshold swing, and on-state resistance, while increasing field-effect mobility and the on-off ratio. Furthermore, the stacking with HfO2 dielectric can provide better gate control and lower interface trap density.
Article
Engineering, Electrical & Electronic
Bo Liu, Fengjiao Lyu, Bin Tang, Xuan Li, Jianhui Liao, Qing Chen
Summary: This research extracted the Schottky barrier heights (SBHs) at the contact between the ferroelectric alpha-In2Se3 nanosheet and metals by studying field-effect transistors. The results showed all three types of devices exhibited an n-type field-effect character despite the large difference in metal work functions.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
