Article
Crystallography
Linda Serairi, Yamin Leprince-Wang
Summary: This study demonstrates a piezoelectric nanogenerator based on ZnO nanowire array, which can convert mechanical energy into electricity. The performance of the nanogenerator has been tested in compression and vibration modes.
Article
Materials Science, Multidisciplinary
Yuxin Chen, Zunyi Tian, Xiao Chen, Yao Zhao, Zhongyu Hou, Maobo Fang, Haitao Wang, Weidong Zhang, Yanfang Wang
Summary: This research reports a bifacial superposed zinc oxide piezoelectric nanogenerator that outperforms a single unit. By alternatingly superposing two elementary units with a carbon-contained polyurethane foil, the piezoelectric output performance can be further enhanced. The obtained nanogenerators are flexible, stable, and have high output, making it suitable for self-powered device applications.
Article
Chemistry, Physical
Jaeho Shim, Dong Ick Son, Joo Song Lee, Jaehyeon Lee, Guh-Hwan Lim, Hyunjin Cho, Eun-young Kim, Sang Don Bu, I. M. Sungbin, Chang Kyu Jeong, Sina Rezvani, Simon S. Park, Young Jae Park
Summary: In this study, high-performance piezoelectric devices based on BNNT-ZnO quantum dots nanocomposites were developed to improve piezoelectric properties in the radial direction. Through the combination of zinc oxide quantum dots and boron nitride nanotubes, the piezoelectric coefficient and charge coefficient were significantly increased, showing potential for innovative materials and devices in energy generation.
Article
Chemistry, Analytical
Dongzhi Zhang, Qian Mi, Dongyue Wang, Tingting Li
Summary: A self-powered high-performance gas sensor based on MXene/Co3O4 composite driven by ZnO/MXene nanowire arrays piezoelectric nanogenerator at room temperature was reported, showing significant response to formaldehyde concentration. The sensor has potential application value for detecting formaldehyde, and the piezoelectric output voltage can drive the sensor effectively.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Ang Yang, Yu Qiu, Dechao Yang, Kehong Lin, Shiying Guo
Summary: Experimental and theoretical studies of the piezoelectric effect of two-dimensional ZnO nanostructures, including SNSs and CNSs, were conducted in this paper. The results showed that CNSs have a significant advantage in piezoelectric properties. Using the finite element method, the piezopotential distribution of CNS and SNS structures was studied, with simulation results demonstrating that CNSs generate larger piezopotentials than SNSs in the case of lateral bending.
Article
Chemistry, Multidisciplinary
Md. Jahirul Islam, Hyeji Lee, Kihak Lee, Chanseob Cho, Bonghwan Kim
Summary: By enhancing the open-circuit voltage of PVDF and ZnO composite samples to 4.2 V, compared to 1.2 V for pure PVDF samples, the piezoelectric capabilities were improved. A composite film was created using the spin coating method, with ZnO nanoparticles and PVDF as the matrix. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and fourier transform infrared (FT-IR) were used to evaluate the properties of these formations.
Article
Chemistry, Physical
Ping-Che Lee, Yu-Liang Hsiao, Jit Dutta, Ruey-Chi Wang, Shih-Wen Tseng, Chuan-Pu Liu
Summary: This study explores the use of porous ZnO thin films to enhance the output voltage and sensitivity of piezoelectric nanogenerators. The presence of pores leads to lattice contraction in the c-direction, resulting in improved performance. Transmission electron microscopy characterizations confirm the mechanism behind the enhancements.
Article
Chemistry, Physical
Shuoang Cao, Haojie Zou, Bei Jiang, Meilin Li, Quanping Yuan
Summary: Polymer-based piezoelectric composites have high piezoelectric performance, flexibility, and shaping properties; MoS2@ZnO promotes PVDF phase transformation; PVDF/MoS2@ZnO shows excellent mechanical performance, flexibility, high open-circuit voltage, and short-circuit current.
Article
Polymer Science
Ismail Borazan, Ayse Celik Bedeloglu
Summary: This paper investigates the development of self-standing piezoelectric nanogenerator (PENG) fabrics using flexible composite poly(vinylidene fluoride) (PVDF) nanofiber yarns doped with zinc oxide (ZnO) nanoparticles to enhance energy output. The most successful fabric achieved a peak total power of 81 µW and a power density of 30 µW/cm(2). These findings open up opportunities for the development and use of PVDF/ZnO-based nanomats in healthcare and engineering industries for sensors and actuators.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Weixia Huang, Yun Tong, Dongmei Feng, Zhendong Guo, Runze Ye, Pengzuo Chen
Summary: In this study, self-supported Co3N nanowire arrays with different Mo doping contents were synthesized by hydrothermal and nitridation processes, and they exhibited robust electrocatalytic activity for overall water splitting. The optimal Co3N-Mo-0.2/Ni foam electrode showed a low overpotential of 97 mV at a current density of 50 mA cm(-2) for the hydrogen evolution reaction. Theoretical calculations confirmed that Mo doping could effectively modulate the electronic structure and surface adsorption energies of Co3N, leading to improved reaction kinetics and catalytic activity.
Article
Engineering, Electrical & Electronic
Xixi Zhang, Weiwei Wang, Dongzhi Zhang, Qian Mi, Sujing Yu
Summary: A self-powered ethanol gas sensor based on Ag/ZnO nanowire arrays prepared by a two-step hydrothermal method is reported, which can detect various concentrations of ethanol gas at room temperature, with piezoelectric output voltage decreasing as concentration increases. The addition of Ag greatly enhances the piezoelectric output capability of the sensor and plays a catalytic role, while forming a Schottky barrier with ZnO to affect gas sensing performance and reaction rate.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Huiqin Zhou, Anlin Feng, Shanshan Ji, Yidong Hu, Qingyang Li
Summary: A ZnO nanowire array was synthesized within 10 minutes for the first time through electrodeposition of a Zn nanocrystal coating followed by a microwave hydrothermal treatment, offering the cheapest and fastest route from aqueous solutions so far. This simple, economical, efficient, flexible, and scalable method has promising prospects for industrial applications.
CHEMICAL COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Lin Wang, Jie Wu, Minghui Shang, Fengmei Gao, Xiaoxiao Li, Yapeng Zheng, Dongdong Zhang, Weiyou Yang, Shanliang Chen
Summary: In this study, ZnO/SiC nanowire heterojunctions with various ZnO piezoelectric shell thicknesses were constructed to improve the sensitivity of semiconductor pressure sensors' piezoresistive behavior. By optimizing the piezoresistive coefficient and ΔR/R₀ value through adjusting the ZnO nanolayer thickness, a novel strategy for exploring advanced SiC-based pressure sensors was proposed.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Multidisciplinary Sciences
Chaojie Chen, Shilong Zhao, Caofeng Pan, Yunlong Zi, Fangcheng Wang, Cheng Yang, Zhong Lin Wang
Summary: A simple and effective method is proposed to quantitatively identify and extract the piezoelectric charge from hybrid signals, elucidating the true performance of piezoelectric devices.
NATURE COMMUNICATIONS
(2022)
Article
Polymer Science
Dandan Zhang, Xiuli Zhang, Xingjia Li, Huiping Wang, Xiaodong Sang, Guodong Zhu, Yuhei Yeung
Summary: A unique and highly flexible piezoelectric nanogenerator based on bismuth chloride (BiCl3)/zinc oxide (ZnO)/poly(vinylidene fluoride) (PVDF) nanofibers was prepared using electrospinning technique. It exhibited excellent performance as a highly sensitive self-powered sensor and could detect vital signals.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Statistics & Probability
Qian Xiao, V. Roshan Joseph, Douglas M. Ray
Summary: This article explores the difficult problem of identifying important factors from a large number of potentially important factors in a highly nonlinear and computationally expensive black box model. By establishing a connection between Morris screening and Sobol' design, an improved design called MOFAT is developed for screening, along with efficient methods for constructing MOFAT designs with a large number of factors.
Article
Engineering, Mechanical
Henry Shaowu Yuchi, V. Roshan Joseph, C. F. Jeff Wu
Summary: The numerical accuracy of finite element analysis depends on the number of finite elements used in the discretization of the space, which can be controlled by adjusting the mesh size. This article proposes a method to optimally find the mesh sizes for each simulation and satisfy the same time constraints as a single or a double mesh size experiment. The approach allows for more reliable multifidelity modeling and prediction of outcome.
JOURNAL OF MECHANICAL DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Aditya Venkatraman, Soumya Mohan, V. Roshan Joseph, David L. McDowell, Surya R. Kalidindi
Summary: This paper presents a new framework for evaluating the relative accuracy of slip transfer criteria in modeling the constitutive response of lamellar morphology grains in a-ss Titanium alloys. The framework includes statistical evaluation of the grain morphology, modeling of dislocation slip transfer effects, consideration of multiple slip transfer criteria, and Bayesian calibration of material parameters using nanoindentation experimental data. The proposed framework provides a robust protocol for incorporating uncertain information obtained from lower scales.
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Analytical
Xue Wang, Zhiping Feng, Gaoqiang Zhang, Luna Wang, Liang Chen, Jin Yang, Zhonglin Wang
Summary: Recent advances in flexible pressure sensors have made them promising technologies for human epidermal pulse wave monitoring. A 3 x 1 flexible pressure sensor array was developed using three single-electrode sensors with small area to measure pulse waves at different local positions of the radial artery. The designed single sensor has a small area of 6 x 6 mm² and demonstrates high pressure sensitivity, fast response time, wide frequency range, and stability.
Article
Materials Science, Multidisciplinary
Yandong Zhang, Lei Chen, Shuai Yang, Yongbo Liu, Luhua Chen, Long Chen, Jinhui Song, Qing Yang
Summary: This paper presents a biodegradable flexible tactile sensor (BFTS) based on chitosan film doped with Ostrinia furnacalis cuticular protein (OfCPH-1) as substrate and Zn as the interdigital electrode. The BFTS maintains a precise and stable response to microdistance, and it completely degrades within 3 hours through solubility testing in Stroke-physiological saline solution. Furthermore, the BFTS has been tested in complications monitoring after meniscal removal surgery, showing potential application as an implantable medical device.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
Luhua Chen, Long Chen, Jian Chu, Shuai Yang, Zhongge Ma, Zhiyuan Jia, Jinhui Song
Summary: With the development of wearable electronics, the demand for high-performance photodetectors with smaller size, lower power consumption, and higher sensitivity has increased. Photodetectors based on one-dimensional zinc oxide nanowires have been intensively investigated, but they can only detect ultraviolet light. This paper reports a heterojunction photodetector based on ZnO/CuO/NiO core-shell-shell nanowires, which shows a fast response and a large sensitivity under UV irradiation. The results indicate that core-shell-shell heterojunction nanostructures can be used to develop high-performance photodetectors for UV-vis broadband photosensing applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Robotics
Chenxi Xiao, Aaron Benjamin Woeppel, Gina Marie Clepper, Shengjie Gao, Shujia Xu, Johannes F. Rueschen, Daniel Kruse, Wenzhuo Wu, Hong Z. Tan, Thomas Low, Stephen P. Beaudoin, Bryan W. Boudouris, William G. Haris, Juan P. Wachs
Summary: This article focuses on the study and development of innovative techniques for a new robot platform, including the use of an organic electrochemical transistor device to detect explosive residues and make safe removal decisions, utilizing Taurus' surgical gripper for object tactile exploration and precise manipulation, and implementing a highly sensitive triboelectric tactile sensor to reduce intrusiveness and detonation risk. Haptic devices, visual displays, and machine learning are also employed to enhance the teleoperator's situational awareness and object identification from tactile sampling, allowing for a sensitive approach to concealed objects accessible only through tactile sensing.
IEEE TRANSACTIONS ON ROBOTICS
(2023)
Article
Chemistry, Multidisciplinary
Jinchao Wu, Yandong Zhang, Zhiyuan Jia, Zhongge Ma, Jinhui Song
Summary: This study demonstrates the potential of salt-assisted chemical vapor deposition (SA-CVD) for synthesizing MoS2 nanoflakes and proposes a vapor-liquid-solid (VLS) edge-adsorbed growth model. By controlling the carrier gas flow rate, the morphology and defect formation of MoS2 crystals can be effectively controlled.
Article
Computer Science, Information Systems
Jiabin Zhang, Erming Su, Chengyu Li, Shuxing Xu, Wei Tang, Leo N. Y. Cao, Ding Li, Zhong Lin Wang
Summary: This study introduces an intelligent artifact-monitoring system (SAMS) based on a porous carbon black (CB)/Ecoflex triboelectric nanogenerator (PCE-TENG) that can monitor collisions in real-time and absorb vibrations during artifact transportation. The system consists of six PCE-TENGs attached to the inner wall of the artifact transport package, allowing collision monitoring and protection in different directions. This research presents a practical strategy for artifact transportation monitoring and package engineering, which could have significant implications for the field.
Article
Materials Science, Multidisciplinary
Dan Lei, Jin-Hui Song, Ze-Ling Wu, Jia-Xuan Hu, Ya-Shu Wang, Dong-Hai Zhang, Lingyi Meng, Xu-Lin Chen, Can-Zhong Lu
Summary: This research reports two novel TADF emitters (CF3-Pym-DMAC and Ph-Pym-DMAC) with an asymmetric D-A-D molecular conformation, using dimethylacridine donors and substituted-pyrimidine acceptors. The presence of different substituents on pyrimidine acceptors leads to significant variations in molecular conformations, packing modes, excited-state nature, and luminescence properties. The substitution effect ultimately results in a more than threefold increase in maximum EQE and a substantial reduction in efficiency roll-off for the TADF-OLEDs.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Fangfang Qi, Xin Lv, Jinhui Song, Xifeng Fu, Lingyi Meng, Can-Zhong Lu
Summary: Developing lead-free perovskite materials with suitable properties is crucial for their application in next-generation photovoltaic technologies. High throughput screening combined with first principles method is used to identify promising lead-free perovskites. Cs2KMI6 (M = Ga, In) is selected as a potential candidate based on its appropriate structure factors, positive decomposition energies, and suitable direct bandgaps. The thermal and mechanical stability, geometric and electronic structures, photovoltaic properties, and defect effects are thoroughly investigated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Shanshan Jiang, Fangfang Qi, Donghai Zhang, Xin Lv, Jinhui Song, Junjing Gu, Jinglin Chen, Lingyi Meng
Summary: In this study, a new TADF molecule QAD-Cz and two new derivatives QAD-TPA and QAD-DPTZ were theoretically investigated. The experimental results showed that QAD-Cz has a high fluorescence quantum efficiency of 96.5%, while QAD-DPTZ exhibits fast reverse intersystem crossing rates and an emission wavelength of 638 nm, expanding the emission color range of MR-QAD-based TADF materials. The study also demonstrated that QAD-DPTZ can exhibit excellent luminescence performance in amorphous states.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jinhui Song, Hongmei Qin, Shiyu Qin, Man Liu, Shixian Zhang, Junyu Chen, Yang Zhang, Shan Wang, Qi Li, Lijie Dong, Chuanxi Xiong
Summary: Flexible polymer dielectrics for capacitive energy storage at elevated temperatures are in high demand for miniaturizing electrical devices. Aromatic backbones in traditional high-resistance polymer dielectrics have low breakdown strength and loss at high temperatures. This study introduces rigid and non-coplanar alicyclic segments into the polyimide backbone, resulting in an all-alicyclic polyimide with a high glass transition temperature and large band gap. The all-alicyclic polyimide exhibits superior discharge energy density and efficiency compared to commercial polyetherimides, and possesses better self-clearing characteristics, making it suitable for practical applications.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Jing Jiang, Ruifang Zhang, Meng Hao Lee, Wenzhuo Wu
Summary: In this study, a flexible piezo-electrocatalytic uric acid sensor (EPICS) based on ZnO nanorods was designed and implemented for non-invasive monitoring of uric acid levels. The EPICS devices achieved a 4-fold enhancement in sensing performance with a small compressive strain, exhibiting superior sensitivity and low detection limit. The design can be extended to other piezoelectric materials with catalytic properties for high-performance sensing in various fields.
Article
Energy & Fuels
Ruifang Zhang, Yuqing Meng, Lu-Cun Wang, Min Wang, Wei Wu, Wenzhuo Wu, Dong Ding
Summary: This study demonstrates that integrating a highly efficient thermal catalyst with a solid oxide fuel cell can effectively enhance the electrochemical and catalytic performance for propane conversion. The integrated catalyst exhibits improved power density and activity compared to conventional catalysts, achieving higher propylene selectivity and coke tolerance. This work provides a general approach for boosting the performances of p-SOFCs in chemical production.
