Article
Chemistry, Physical
Pengshan Xie, Yulong Huang, Wei Wang, You Meng, Zhengxun Lai, Fei Wang, SenPo Yip, Xiuming Bu, Weijun Wang, Dengji Li, Jia Sun, Johnny C. Ho
Summary: The research presents InGaAs nanowire artificial synapses wrapped in poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)), capable of operating with record-low subfemtojoule power consumption. By adjusting the thickness of top P(VDF-TrFE) films, essential synaptic behaviors are effectively mimicked and modulated, while long-term depression is realized through visible light application. Combined with optimal P(VDF-TrFE) films, the synaptic devices exhibit more linear characteristics and faster learning processes, demonstrating potential advantages for neuromorphic computing systems.
Article
Polymer Science
Wenyi Zhu, Xin Chen, Q. M. Zhang
Summary: We studied the effects of annealing temperatures on the ferroelectric and electromechanical responses of a relaxor polymer. The results showed that only within a narrow temperature window, the polymer exhibited the highest electromechanical response. Films annealed outside of this window contained a small amount of polar phase mixed with the relaxor phase, resulting in different responses.
Article
Materials Science, Multidisciplinary
Jonas Hafner, Marco Teuschel, Davide Disnan, Michael Schneider, Ulrich Schmid
Summary: This study successfully enhanced and controlled the piezoelectric activity of polymer-based MEMS resonators by utilizing the non-linear electrostrictive effect in ferroelectric polymers. The results demonstrate the potential for tuning and improving the piezoelectric response through bias-induced polarization, showcasing the ability to tailor actuating and sensing properties in MEMS devices.
MATERIALS RESEARCH LETTERS
(2021)
Article
Chemistry, Physical
Zhibo Xu, Shenglin Jiang, Shuai Tang, Yebin Xu
Summary: This study successfully enhanced the tunability of ferroelectric-dielectric composite films while decreasing the dielectric constant through organic-inorganic compositing. With increasing MgO content, the tunability of the composite films increased up to 25.6%, paving a new pathway for further research on the performance of ferroelectric materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
C. Zhao, Y. Hong, X. Chu, Y. Dong, Z. Hu, X. Sun, S. Yan
Summary: The effects of thermal treatment temperature and crystallization temperature on the structure, morphology, and piezoelectric/ferroelectric properties of P(VDF-TrFE) on graphene substrate were investigated. It was found that coercive voltage is dependent on crystallization temperature, and there exists an optimum crystallization temperature for the best properties of the sample. The relationship between structure and piezoelectric/ferroelectric properties was established, providing guidance for fabricating high-performance P(VDF-TrFE)/graphene devices.
MATERIALS TODAY ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Zulmari Silva Pedraza, Yizhan Wang, Corey Carlos, Zhongmin Tang, Jun Li, Weibo Cai, Xudong Wang
Summary: This study explores the use of piezoelectric microparticles as a method for inducing irreversible electroporation of breast cancer cells. The results show a reduction in cell viability, suggesting that this approach may offer a more benign cancer treatment option.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Geunryeol Baek, Su Chul Yang
Summary: In this study, polymer composites of P(VDF-TrFE)/p-Ni were developed for electrostatic air filters, which showed high PM filtration efficiency with low pressure. The surface charge in the composites was enhanced by optimizing the dip-coating solutions, and the interfacial strain propagation between P(VDF-TrFE) and porous-Ni was investigated. The ME-based composites exhibited potential for practical PM2.5 removal.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Physical
Hongxia Li, Mingliang Cheng, Yingxin Chen, Gang Du, Junhua Xi, Xin Hu, Xianguo Liu, Xuefeng Zhang, Zhaodong Li
Summary: Introducing a nano-thick transparent ferroelectric P(VDF-TrFE) film on TiO2 effectively enhances the photocurrent density, providing a novel approach for optimizing the catalytic characteristics of PEC photoelectrodes.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yanmei Sun, Nian He, Yufei Wang, Qi Yuan, Dianzhong Wen
Summary: This study demonstrates a scheme for multilevel memory and neural morphological computing based on P(VDF-TrFE) transistors. By modulating the potential of the transistor channel and the electric field of the P(VDF-TrFE) ferroelectric film, a multilevel nonvolatile memory state is achieved. Artificial synaptic plasticity of the transistor is simulated, allowing for long-term plasticity and various synaptic behaviors.
Article
Chemistry, Multidisciplinary
Zhaoying Dang, Feng Guo, Huan Duan, Qiyue Zhao, Yuxiang Fu, Wenjing Jie, Kui Jin, Jianhua Hao
Summary: In this study, ferroelectric-tuned synaptic transistors were designed by integrating 2D black phosphorus with a flexible ferroelectric copolymer. These transistors exhibited high mobility, low energy consumption, and reliable synaptic behaviors, such as paired-pulse facilitation and long-term depression/potentiation. Furthermore, an artificial neural network was successfully simulated for handwritten digit recognition with a high accuracy of 93.6%. These findings highlight the potential of 2D ferroelectric field-effect transistors as ideal building blocks for high-performance neuromorphic networks.
Article
Materials Science, Multidisciplinary
Yi-Jen Huang, Po-Han Hsiao, Chun-Chieh Wang, Chun-Jen Su, Jen-Hao Chang, Yu-Cheng Kuo, Wen-Ching Ko
Summary: Soft piezoelectric composite nanofibers composed of P(VDF-TrFE) and P(VDF-TrFE-CTFE) were prepared by coaxial electrospinning technique. The relationship between crystal structures and piezoelectric responses was investigated. The piezoelectric voltages of the composite nanofibers were approximately 3.0 V and 3.5 V at 10 Hz and 100 Hz, respectively. In-situ WAXS was used to observe the effect of applied voltage on lattice strains in different lattice orientations. Crystallographic studies on the composite nanofibers revealed co-crystallization, which led to higher piezoelectric voltages in the composite nanofibers.
Article
Materials Science, Multidisciplinary
Sara Zanchi, Antoine Pascaud, Fabrice Domingues Dos Santos, Sylvie Tence-Girault, Sebastien Roland
Summary: This article studies the electric responsiveness of P(VDF-co-TrFE) copolymer and P(VDF-ter-TrFE-ter-CTFE) terpolymer films in response to an external electric field. Factors such as chemical composition and thermal treatment affect the performance of these electroactive films. The study analyzes the nanoscale response using piezoresponse force microscopy on thin films (~100 nm thick), and the macroscopic response by measuring the electric displacement-electric field loops on thick films (~20 μm thick). The chemical composition (CTFE content) is crucial in defining the electroactive behavior at both scales, while the thermal treatment has a more significant impact at the nanoscale. The orientation, shape, and size of the crystalline lamellae affect the sensitivity of the electric dipoles to the applied electric field, and controlled growth of edge-on lamellar stacks improves the piezoresponse of the film.
ACS APPLIED POLYMER MATERIALS
(2023)
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
Engineering, Electrical & Electronic
Guo Tian, Liang Tang, Jieling Zhang, Shenglong Wang, Yue Sun, Yong Ao, Tao Yang, Da Xiong, Hongrui Zhang, Boling Lan, Lin Deng, Weili Deng, Weiqing Yang
Summary: In this study, a method of combining spin-coating and aqueous phase exfoliation is proposed to prepare ultrathin poly(vinylidene fluoride-ran-trifluoroethylene) (P(VDF-TrFE)) piezoelectric film with a thickness of about 3 μm. Thermal treatment is employed to improve the crystallinity and piezoelectricity of the film, resulting in a piezoelectric coefficient of 11.67 pC N-1 and a sensitivity of 4.56 mV kPa-1. The ultrathin device is successfully used to monitor arterial pulse and interactive force, providing potential references for medical diagnosis and robot design. This work could contribute to the design principles and methods of ultrathin epidermal devices and promote their applications in wearable flexible electronics.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Guo Tian, Liang Tang, Jieling Zhang, Shenglong Wang, Yue Sun, Yong Ao, Tao Yang, Da Xiong, Hongrui Zhang, Boling Lan, Lin Deng, Weili Deng, Weiqing Yang
Summary: In this study, a method combining spin-coating and aqueous phase exfoliation was proposed to prepare ultrathin piezoelectric film with a thickness of about 3 μm. The ultrathin device was successfully applied to monitor arterial pulse and interactive force, providing references for medical diagnosis and robot design. This work may also inspire design principles and methods of ultrathin epidermal devices and promote their applications in wearable flexible electronics.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
