Article
Nanoscience & Nanotechnology
Robert Roth, Martin M. Koch, A. Diana Rata, Kathrin Doerr
Summary: This study demonstrates the reorientation and alignment of electric polarization in thin films using the mechanical effect of a scanning unbiased force microscopy tip. It shows that this method can be used to write stable domain patterns at the nanoscale, which can be utilized in thin film devices.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Ceramics
Javier Mena-Garcia, Sinan Dursun, Kosuke Tsuji, Sun Hwi Bang, Zhongming Fan, Arnaud Ndayishimiye, Clive Randall
Summary: The Cold Sintering Process (CSP) is used to design ceramic-polymer composites with PVDF-TrFE as an active phase for controlling the electrical properties of the materials. The thickness of the polymer phase is verified through electrical measurements and modeling.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Polymer Science
Sushmita Dwivedi, Manish Badole, Kaushal Gangwar, Sunil Kumar
Summary: This paper provides a detailed analysis of the electrical and mechanical responses of various components in high-performance polymer-ceramic composites. The introduction of ceramic fillers enhances the dielectric constant and storage capacity of the composite materials, making them suitable for flexible high-performance capacitive devices.
Article
Engineering, Environmental
Zhaopeng Wang, Jie Liu, Kewang Yi, Pan Chen, Yuhong Zhu, Dongxia Tian, Baojin Chu
Summary: In this study, a new functionality of PVDF-based polymer, shape memory effect, is demonstrated, which mainly originates from the ferroelectric-paraelectric phase transition. By compounding modified Schiff base light-sensitive materials with the polymer, composites exhibiting light-activated shape memory effect in the visible light range are achieved, and light-induced deformation is also obtained. Flexible actuators and robots are designed by combining different activation methods, showcasing the potential applications of these multifunctional composites. This study proposes new composites with good application potential and expands the functionality of PVDF-based ferroelectric polymers.
CHEMICAL ENGINEERING JOURNAL
(2023)
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
Chemistry, Multidisciplinary
Hamed Abdolmaleki, Astri Bjornetun Haugen, Kristian Birk Buhl, Kim Daasbjerg, Shweta Agarwala
Summary: An interfacial engineering approach using amine-functionalized graphene oxide (AGO) is proposed to enhance the electrical properties of fluoropolymers. This method enables the formation of beta-phase, enlargement of lamellae dimensions, and alignment of micro-dipoles. The resulting PVDF-TrFE films with AGO demonstrate exceptional remnant polarization and high voltage coefficient, energy density, and energy-harvesting figure of merit values, making them suitable for next-generation wearables and human-machine interfaces.
Article
Chemistry, Physical
Yoseop Lee, Sungmun Song, Woori Ham, Seung-Eon Ahn
Summary: This study proposes a Si-doped HfO2-based FTJ device with a metal-ferroelectric-insulator-semiconductor (MFIS) structure to maximize the tunneling electro-resistance (TER) effect. The potential barrier modulation effect is analyzed, and its potential as a non-volatile memory device is demonstrated through stability assessments.
Article
Polymer Science
Edgar Gutierrez-Fernandez, Jose Sena-Fernandez, Esther Rebollar, Tiberio A. Ezquerra, Francisco J. Hermoso-Pinilla, Mikel Sanz, Oscar Galvez, Aurora Nogales
Summary: Ferroelectric polymer nanoparticles of PVDF were prepared using dialysis nano-precipitation. The nanoparticles showed piezoelectric response as observed by PFM. The ferroelectric behavior was attributed to the presence of ferroelectrically active crystalline phases of PVDF in the nanoparticles (mainly beta and gamma phases) as demonstrated by DSC, FTIR, and XRD. The combination of the preparation method and temperature treatment can tune the ferroelectric properties of PVDF homopolymer nanoparticles.
Article
Chemistry, Multidisciplinary
Fang-Jui Chu, Yu-Chieh Chen, Li-Chung Shih, Shi-Cheng Mao, Jen-Sue Chen
Summary: In this study, a dual-gate ferroelectric polymer P(VDF-TrFE)-coupled IGZO thin-film transistor is proposed, which exhibits both short- and long-term memory functionalities and can be utilized in the reservoir and readout layers of neuromorphic computers. This technology holds significant potential for next-generation hybrid intelligent applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Tianshu Liu, Xiaoji Zhou, Yizhuo Sun, Renbi Bai
Summary: In this study, PVDF/PTFE composite membranes were prepared by adding PTFE nanoparticles to a PVDF solution. The addition of PTFE significantly enhanced the corrosion resistance of the membranes, especially under acidic conditions.
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
Polymer Science
Kirill Sobolev, Valeria Kolesnikova, Alexander Omelyanchik, Yulia Alekhina, Valentina Antipova, Liudmila Makarova, Davide Peddis, Yuriy L. Raikher, Katerina Levada, Abdulkarim Amirov, Valeria Rodionova
Summary: This study focuses on polymer-based multiferroics, which combine magnetic and piezoelectric properties and have the potential for fabricating biocompatible scaffolds. The study investigates composites based on PVDF-TrFE polymer matrices filled with a combination of piezoelectric and/or ferrimagnetic particles. The results show that the presence of certain particles enhances the magnetoelectric response of the composites. Moreover, the mechanical properties of the composite and its local surfacial mechanical properties are crucial factors to consider for stem cell cultivation.
Article
Engineering, Electrical & Electronic
Jia-Wei Zhang, Xuan Meng, Geng Fu, Tao Han, Fan Xu, Chatchai Putson, Xiaoxu Liu
Summary: The high power consumption of nonvolatile memory is a major challenge for information storage devices. The use of magnetoelectric coupling in multiferroic nanocomposites provides an effective approach to reduce power consumption. This study presents a Fe3O4-embedded multiferroic nanocomposite with higher ME voltage coefficients for piezoelectric thin films. The nanocomposite exhibits enhanced ME effect at a microscopic level and shows great potential for next-generation memory devices in the realm of artificial intelligence and wearable devices.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yanguang Zhang, Badrou Reda Aich, Shoude Chang, Kate Lochhead, Ye Tao
Summary: In this study, the issue of short circuits in flexible ferroelectric capacitors based on copolymer poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] was explicitly investigated. It was found that processing conditions such as drying temperatures, solvent evaporation rates, and solution concentrations have significant effects on short circuit conditions. The factors influencing short circuits were identified, including film porosity, surface roughness, and defect conditions. These factors need to be carefully controlled to achieve high yields in P(VDF-TrFE) thin film memory devices.
ORGANIC ELECTRONICS
(2022)
Article
Polymer Science
Xiao Chu, Jia-Qian Kang, Ya Hong, Guo-Dong Zhu, Shou-Ke Yan, Xue-Yun Wang, Xiao-Li Sun
Summary: This study investigates the effects of the structure and morphology of P(VDF-TrFE)/P3HT blend films on different substrates on the ferroelectric and switching properties of related devices. It is found that the blend films prepared on graphene substrate optimize the ferroelectric behavior of P(VDF-TrFE) and enhance charge transport within P3HT domains. High-performance ferroelectric memory devices are obtained with a sandwich structure composed of silver electrode and P3HT/P(VDF-TrFE) blend film on graphene substrate, exhibiting excellent electrical switching behavior.
CHINESE JOURNAL OF POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Jae Ryung Choi, Seunggun Yu, Haejong Jung, Sun Kak Hwang, Richard Hahnkee Kim, Giyoung Song, Sung Hwan Cho, Insung Bae, Soon Man Hong, Chong Min Koo, Cheolmin Park
Article
Engineering, Chemical
Insung Bae, Keun-Hwan Oh, Sung-Hyun Yun, Hyuk Kim
JOURNAL OF MEMBRANE SCIENCE
(2017)
Article
Engineering, Chemical
Keun-Hwan Oh, Insung Bae, Hongkyung Lee, Hyuk Kim, Hee-Tak Kim
JOURNAL OF MEMBRANE SCIENCE
(2017)
Article
Engineering, Chemical
Insung Bae, Keun-Hwan Oh, Minhyuk Yun, Min Kwan Kang, Hyun Hoon Song, Hyuk Kim
JOURNAL OF MEMBRANE SCIENCE
(2018)
Article
Chemistry, Multidisciplinary
Yujeong Lee, Kang Lib Kim, Han Sol Kang, Beomjin Jeong, Chanho Park, Insung Bae, Seok Ju Kang, Youn Jung Park, Cheolmin Park
Article
Nanoscience & Nanotechnology
Insung Bae, Richard Hahnkee Kim, Sun Kak Hwang, Seok Ju Kang, Cheolmin Park
ACS APPLIED MATERIALS & INTERFACES
(2014)
Article
Chemistry, Multidisciplinary
Sun Kak Hwang, Sung-Yong Min, Insung Bae, Suk Man Cho, Kang Lib Kim, Tae-Woo Lee, Cheolmin Park
Article
Materials Science, Multidisciplinary
Sun Kak Hwang, Kang Lib Kim, Suk Man Cho, Tae Joon Park, Beomjin Jeong, Insung Bae, Cheolmin Park
ORGANIC ELECTRONICS
(2019)
Article
Green & Sustainable Science & Technology
Insung Bae, Bongsoo Kim, Young Kim, Hyuk Kim, Keun-Hwan Oh
Article
Polymer Science
Hongdae Seo, Insung Bae
Article
Engineering, Chemical
Hu-Geun Kwon, Insung Bae, Seong-Ho Choi
Summary: Crosslinked poly(arylene ether ketone) membranes were synthesized for use in non-aqueous redox flow batteries, resulting in improved cell efficiency.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Polymer Science
Gaae Yun, Seong Ku Kim, Insung Bae
Summary: The introduction of gadolinium-doped cerium oxide nanoparticles and hydrocarbon-based proton exchange membrane improves the physical and chemical stability of the membrane, enhances proton conductivity, and prevents membrane swelling.
Article
Chemistry, Physical
Hyunseung Lee, Hongdae Seo, Seong Ku Kim, Insung Bae
Summary: The aligned nanostructure of perfluorinated polymer electrolytes, achieved through capillary force lithography, enables increased proton conductivity. A hierarchical structure is realized through soft lithography, allowing control over the structures of proton-transporting channels. The line-patterned membranes show enhanced proton conductivities, as confirmed by electrochemical impedance analysis. Moreover, an increased interfacial contact area improves the power generation efficiency of the membrane-electrode assembly in proton-exchange membrane fuel cells.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Kang Lib Kim, Sung Hwan Cho, Jae-Bok Lee, Gwangmook Kim, Kyuho Lee, Seung Won Lee, Han Sol Kang, Chanho Park, Jong-Hyun Ahn, Wooyoung Shim, Insung Bae, Cheolmin Park
Summary: This study presents transparent and flexible capacitive pressure sensors using a high-k ionic gel blended with an ionic liquid. The topological semicrystalline surface of the blend films enhances their sensitivity to pressure. With optically transparent and mechanically flexible graphene electrodes, a novel pressure sensor with a self-assembled crystalline topology is developed. It exhibits high sensitivity, rapid response times, and durable device operation, making it suitable for various wearable applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Keun-Hwan Oh, Insung Bae
ACS APPLIED NANO MATERIALS
(2019)