ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yangjie Zhong,Chengming Tang,Jidong Sun,Yafeng Zhang,Shaoxiong Cai,Jiaxin Yu
A dielectric film with high breakdown strength and dielectric constant are crucial for the reliable operation of electrowetting on dielectric (EWOD). In this study, barium titanate (BaTiO3) nanoparticles modified with a silane coupling agent (KH550) were incorporated into poly(vinyl fluoride-trifluoroethylene-chlorotrifluoroethylene) (P(VDF-TrFE-CTFE)) and poly(methyl methacrylate) (PMMA) to prepare a BaTiO3–KH550/P(VDF-TrFE-CTFE)/PMMA composite film to enhance the breakdown strength and dielectric constant of a dielectric layer. Results revealed that BaTiO3–KH550 is uniformly dispersed within the P(VDF-TrFE-CTFE)/PMMA polymer matrix. When the BaTiO3–KH550 content is 10 wt %, the dielectric constant reached 24.6, and the energy density was 2.65 J cm–3, representing increases of 94% and 73%, respectively, compared to the pure P(VDF-TrFE-CTFE)/PMMA film, where was 12.7 and 1.53 J cm–3. Additionally, the breakdown strength of all films remains above 150 kV mm–1 due to the strong interfacial interaction between PMMA and P(VDF-TrFE-CTFE). Furthermore, the breakdown strength can keep at 194.90 kV mm–1. Electrowetting experiments demonstrated that the composite film exhibited a high initial contact angle of 105.04°, with a contact angle variation range of 35.3° under a low DC voltage ranged from 0 to 50 V. The results indicated that this film is potential for applications in low-cost and high-dielectric-performance EWOD dielectric layer materials.
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高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2023
·Vol. 63
·期 6
·1817-1827
·
IF 3.2
Yuan Cong,Hongyuan Zhang,Yizhi Liu,Fante Liu,Zidi Zhang,Xu Liu
In this article, a piezoelectric thin film was obtained by mixing polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) and barium titanate (BTO) via a solvent vaporization process. All the morphologies, crystal phases, thermal and electrical tests, as well as potential simulations by COMSOL, were studied to analyze sample performances. It has been demonstrated that BTO has a positive effect on increasing the piezoelectric functional phase-β phase within P(VDF-TrFE). Furthermore, the optimal ratio of BTO to P(VDF-TrFE) was determined to be 10 wt%. BTO nanoparticles were evenly distributed in the P(VDF-TrFE) substrate, forming a more directional structure. Based on the most suitable material composition, piezoelectric, and triboelectric nanogenerators were constructed to harvest mechanical energy from human motions. Moreover, the factors influencing the electrical outputs of nanogenerators were systematically studied, such as the force values and frequencies of excitation, as well as the piezoelectric layer materials. The applications of lighting LEDs highlighted the practical use in everyday life. Finally, the comparison between simulations, theoretical analysis, and experimental results demonstrated the effect of BTO in enhancing the overall material properties. This work expands the application potential of piezoelectric nanocomposites in energy collection and storage by designing and optimizing ceramic-doped piezoelectric polymer composites.
研究领域:
材料科学
·
能源技术
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高影响因子
ACS Biomaterials Science & Engineering
·
2023
·
IF 5.8
Zhiyuan Zhou,Jiamin Zhang,Xuzhao He,Xiaoyi Chen,Lingqing Dong,Jun Lin,Huiming Wang,Wenjian Weng,Kui Cheng
Surface potentials of biomaterials have been shown to regulate cell fate commitment. However, the effects of chirality-patterned potential distribution on macrophage polarization are still only beginning to be explored. In this work, we demonstrated that the chirality-patterned potential distribution of CoFe2O4/poly(vinylidene fluoride-trifluoroethylene) (CFO/P(VDF-TrFE)) films could significantly down-regulate the M1 polarization of bone marrow-derived macrophages (BMDMs). Specifically, the dextral-patterned surface potential distribution simultaneously up-regulated the expression of M2-related markers of BMDMs. The results were attributed to the sensitive difference of integrin subunits (α5β1 and αvβ3) to the dextral- and sinistral-patterned surface potential distribution, respectively. The interaction difference between the integrin subunits and surface potential distribution altered the cell adhesion and cytoskeletal structure and thereby the polarization behavior of BMDMs. This work, therefore, emphasizes the importance of chirality of potential distribution on cell behavior and provides a new strategy to regulate the immune response of biomaterials.
研究领域:
生物材料
·
免疫学
·
细胞生物学
·
材料科学
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DOI
PubMed
高影响因子
Polymers
·
2019
·Vol. 11
·期 3
·526
·
IF 3.164
Jiayun Chen,Xiaoying Xiong,Qilong Zhang,Lingling Shui,Shitao Shen,Hui Yang,Zhicai Zhu,Fang Zhang
P(VDF-TrFE) (vinylidene fluoride-co-trifluoroethylene)/PMMA (PVT/PMMA) blended films synthesized through a facile solution-blending method show outstanding performance for practical electrowetting and energy storage applications. The van der Waals forces and dipolar interactions in neighboring P(VDF-TrFE) and PMMA chains, together with the suppressed free volume (or defect) are critical to the significantly-enhanced electrical properties. Typical, Teflon-covered P(VDF-TrFE)/PMMA blended film exhibits a high dielectric constant of 13 with low dielectric loss (~0.05) at 100 Hz and a large initial contact angle of 122°. Its electrowetting response with a contact angle modulation of 50° in air and low contact angle hysteresis demonstrate that it is promising for low-voltage electrowetting applications. Furthermore, with an energy density of 11.8 J/cm3, approximately double that of pure P(VDF-TrFE), PVT/PMMA blended films containing 20 wt % PMMA turn out to be superior materials for energy storage applications, due to their significantly-enhanced polarization and reduced remnant polarization.Keywords:electrowetting;energy storage;dielectric constant;hydrophobicity
研究领域:
材料科学
·
电气工程
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PubMed
高影响因子
Biomaterials Science
·
2022
·Vol. 10
·期 16
·4576-4587
·
IF 7.59
Jiamin Zhang,Xuzhao He,Zhiyuan Zhou,Xiaoyi Chen,Jiaqi Shao,Donghua Huang,Lingqing Dong,Jun Lin,Huiming Wang,Wenjian Weng,Kui Cheng
Piezoelectric poly(vinylidene fluoride-trifluoroethylene) has demonstrated an ability to promote osteogenesis, and biomaterials with a chirality-patterned topological surface could enhance cellular osteogenic differentiation. In this work, we created a chirality-patterned surface potential distribution of CoFe2O4/poly(vinylidene fluoride-trifluoroethylene (CFO/P(VDF-TrFE)) membranes to explore their osteogenic response under no change in surface chemical and topology, attempting to further strengthen the ability of the membranes to promote osteogenesis. The chirality-patterned surface potential distribution was established by microdomain contact polarization with the help of sinistral/dextral-patterned ITO interdigital microelectrodes. In the in vitro evaluations, the mesenchymal stem cells showed a positive response in osteogenic differentiation to CFO/P(VDF-TrFE) membranes with both sinistral- and dextral-patterned surface potential distributions, however, the dextral-patterned distribution gave a stronger response than the sinistral-patterned one. And the in vivo evaluation showed a response tend in new bone tissue formation similar to the in vitro evaluations. The stronger response in osteogenic differentiation and osteogenesis for the CFO/P(VDF-TrFE) membrane with the dextral-patterned distributions may be attributed to that the intense interaction of the cells with the electrophysiological microenvironment appears due to a correspondingly higher expression of integrin α5β1, which significantly up-regulates the Arp2/3 complex expression, a crucial factor for cytoskeleton reorganization, possibly increases cytoskeleton contractility, and strengthens the transduction of the osteogenesis-related signaling cascade. This work proves that the chirality-patterns in surface potential distributions could provide an osteogenic response similar to a chirality-patterned topological surface.
研究领域:
生物材料
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组织工程
·
生物医学工程
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PubMed
高影响因子
PHYSICA B-CONDENSED MATTER
·
2025
·
IF 2.8
Dongxue Luo,Ronghua Qin,Minghang Song,Lingfang Xu,Tian Liang,Yalong Ge,Changping Yang
BiFeO 3 has profuse physical properties in multiferroics. However, significant leakage current constrains its utility in practical applications. In this paper, we synergistically embed BiFeO 3 nanoparticles in a ferroelectric crystal P(VDF-TrFE) base and use barrier layers to reduce the leakage current and promote the ferroelectric performance. Our finding indicate that the multilayer BiFeO 3 /P(VDF-TrFE) composite films equipped with barrier layers exhibit a leakage current below the magnitude of microampere level, a 99 % reduction compared to single-layer films. Additionally, the effective remnant ferroelectric polarization reaches 16 μC/cm 2 , a 66 % improvement. We combined the conductive mechanism analysis by fitting I - V curves and constructing energy band structures, uncovering that the essence of the optimization characteristics is related to a Space-Charge-Limited Conduction (SCLC) mechanism in the multilayer composite films. This research offers potential film solutions for a variety of electrical devices, supported by both experimental and theoretical perspectives.
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高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
Sujian You,Chang Liu,Huiqing Liu,Xiaolei Yu,Shasha Li,Wei Liu,Shishang Guo,Xingzhong Zhao
In this work, one-dimensional (1D) multiferroic BiFeO 3 (BFO) and poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] composite nanofibers are fabricated by using a two-step sol–gel based electrospinning method . X-ray diffraction (XRD) study reveals that crystalline phases corresponding to both BiFeO 3 and P(VDF-TrFE) are found. Microstructure measurement shows that the nanofibers are alignment and BFO nanorods are well-dispersed in the P(VDF-TrFE) fiber matrix. The coexistence of electric and magnetic hysteresis for the composite materials also has been observed successfully at room temperature. It indicates that such nanofibers would perform a wide range of potential applications in flexibility information storage, magnetic recording media , spintronics devices and sensors.
研究领域:
材料科学
·
纳米技术
·
多铁性材料
·
聚合物复合材料
·
自旋电子学
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 15
·1808415
·
IF 15.621
Fengren Cao,Wei Tian,Linxing Meng,Meng Wang,Liang Li
Flexible and self-powered perovskite photodetectors attract widespread research interests due to their potential applications in portable and wearable optoelectronic devices. However, the reported devices mainly adopt an independent layered structure with complex fabrication processes and high carrier recombination. Herein, an integrated ferroelectric poly(vinylidene-fluoride-trifluoroethylene) (P(VDF-TrFE)) and perovskite bulk heterojunction film photodetector on the polyethylene naphthalate substrate is demonstrated. Under the optimum treatment conditions (the polarization voltage and time, and the concentration of P(VDF-TrFE)), the photodetector exhibits a largely enhanced performance compared to the pristine perovskite device. The resulting device exhibits ultrahigh performance with a large detectivity (1.4 × 10 13 Jones) and fast response time (92/193 µs) at the wavelength of 650 nm. The improved performance is attributed to the fact that the polarized P(VDF-TrFE)/perovskite hybrid film provides a stronger built-in electric field to facilitate the separation and transportation of photogenerated carriers. These findings provide a new route to design self-powered photodetectors from the aspect of device structure and carrier transport.
研究领域:
光电子学
·
材料科学
·
柔性电子学
·
光电探测器
·
铁电材料
·
钙钛矿太阳能电池
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 16
·14161-14169
·
IF 2.324
Xiong Xiaoying,Zhou Zhou,Zhang Zhao,Yang Hui,Zhang Qilong
In this study, rod-like TiO 2 filler was synthesized one-step hydrothermal method and was incorporated into P(VDF-TrFE-CFE) polymer matrix to obtain composites with high dielectric constant. It is found that the morphology and content of TiO 2 fillers play a vital role in tailoring the performance of the as-fabricated composites. The rod-like TiO 2 assembled by numerous nanoparticles maintained its primary shape and homogenously distributed in the matrix, thus achieved sophisticated interface and strong interfacial adhesion with P(VDF-TrFE-CFE) polymer, which together contributed to a dramatic improvement in permittivity of composites. Typically, the dielectric constant of composite with 10 vol% rod-like TiO 2 reaches 160 at 100 Hz, in contrast to 102.5 for the composite with 10 vol% commercial TiO 2 and 47 for pristine P(VDF-TrFE-CFE). This study provides a solution for obtaining high-k dielectric composites with low dielectric loss, which is highly desired for advanced electronic devices.
研究领域:
材料科学
·
电子工程
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高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Zhiyuan Zhou,Jiamin Zhang,Xiyue Duan,Weiming Lin,Yang Yi,Wenjian Weng,Kui Cheng,Zuobing Chen
Graphene (Gr)/poly(vinylidenefluoride-co-trifluoroethylene) (P(VDF-TrFE)) composite films were annealed by the photothermal effect that produced between near-infrared laser and graphene. Raman spectra, X-ray Diffraction (XRD), Fourier-Transformed Infrared Spectroscopy (FTIR), Differential scanning calorimetry (DSC) are used to characterize the crystalline state of Gr/P(VDF-TrFE) films. Further, piezoelectric coefficient d 33 were to test polarization performance. Finally, the Bovine serum albumin (BSA) adsorption shows that annealing and polarization of Gr/P(VDF-TrFE) films are important for protein adsorption.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
Coatings
·
2022
·Vol. 12
·期 12
·1947
·
IF 3.236
Qin Luo,Xuzhao He,Xiyue Duan,Haoqing Liu,Zhiyuan Zhou,Kui Cheng
Bone repair and regeneration have aroused widespread interest due to their potential usefulness in cases when bone self-healing is insufficient. In this work, a Poly(vinylidene fluoride-trifluoroethylene)-coated-Poly methyl methacrylate Janus membrane was prepared, where a P(VDF-TrFE) coating on a PMMA film serves as Janus-A to mediate cell growth behavior, owing to its electroactivity, and the PMMA film serves as Janus-B to inhibit soft-tissue growth. A P(VDF-TrFE) coating separated from the substrate was put above the PMMA film before the PMMA film had dried completely, and a Janus membrane formed because of the flowability and adhesion of the nonvolatile PMMA solution. Their bonding could withstand the pressure of the body fluids in the shear direction. Various crystallization substrates were also applied to modulate the P(VDF-TrFE) coating’s surface potentials, as the surface potential would further affect cellular response. It was also found that the responses of the bone marrow mesenchymal stem cells (BMSCs) and bone marrow macrophages (BMDMs) could be adjusted through surface potential modification. Such a Janus membrane could potentially be applied to a biological environment with the effect of both guiding bone regeneration and preventing soft tissue adhesion.Keywords:Janus membrane;P(VDF-TrFE);PMMA;bone tissue regeneration
研究领域:
生物材料学
·
组织工程学
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高影响因子
Device
·
2024
·
IF 0
Cong Liu,Fang Wang,Xuemin Du
Manipulating objects using physical tweezers is crucial in physics, chemistry, and biology. Despite significant advancements, however, these tweezers are still limited by the need for complex electrode arrays, external power sources, and restricted charge-generation capability. Here, we report an innovative self-powered electrostatic tweezer (SET) that harnesses the unique capability of accumulation and tunability of triboelectric charges of the poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE))-based self-powered electrode during sliding triboelectrification, imparting unprecedented flexibility and adaptivity for object manipulation. The SET enables the precise manipulation of objects with diverse materials, including bubbles, solid balls, and liquid droplets, with a superior high velocity of 353 mm s −1 . Notably, the SET is adaptive to open-to-closed platforms, single-to-multiple objects, and two-dimensional (2D)-to-3D surfaces, thereby extending the SET to various applications including droplet robots, cell assembly, and pump-free microfluidics. By eliminating the need for complex electrode arrays, external power sources, and heat generation, the SET holds great potential for next-generation tweezers and microfluidics.
研究领域:
微流控
·
静电学
·
材料科学
·
纳米技术
·
生物物理学
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