Article
Nanoscience & Nanotechnology
Jiale Fang, Chengqi Chen, Hongxing Qi, Jie Zhang, Xiaoxuan Hou, Likun Pan, Xianghui Wang
Summary: Developing flexible electromagnetic interference (EMI SE) shielding materials is crucial for protecting humans from harmful radiation. We designed and fabricated a flexible multilayer structure of PVDF/GNP-PVDF composite film, which exhibited high EMI SE performance (averaging 69.7 dB in X-band), excellent flexibility, and stability (98.85% retention after bending 1000 cycles at 60 degrees). The theoretical study indicates that the multiple reflection and absorption of electromagnetic waves between layers contribute to the high EMI SE performance of the PVDF/GNP-PVDF multilayer film.
ACS APPLIED NANO MATERIALS
(2023)
Article
Polymer Science
Geunryeol Baek, Su-Chul Yang
Summary: This study prepared 3-2 type polymer-based ME films using CoFe2O4-intercalated graphene oxide fillers with different lateral sizes, and found that the lateral size affected CFO intercalation, polymeric phase conformation, dipole alignment, and magnetoelectric responses.
Article
Chemistry, Physical
Seyed Mohsen Seraji, Xing Jin, Zhifeng Yi, Chunfang Feng, Nisa V. Salim
Summary: This study demonstrates the crystalline transformation of PVDF influences aerogel formation and compressible sensing properties of a graphene composite. The fabricated PVDF/graphene foams and aerogels show high sensitivity and improved compressive strength. The results provide new pathways for fabricating porous composites with lighter density and high mechanical and electrical properties.
Article
Materials Science, Multidisciplinary
Sepide Taleb, Miguel A. Badillo-Avila, Monica Acuautla
Summary: In this study, 5-9 μm thick PVDF films were successfully fabricated using a nozzle-less ultrasonic spray coating system, showing high uniformity and large d(33) values after annealing. The results demonstrate the potential industrial application of this method for producing large-scale piezoelectric films.
MATERIALS & DESIGN
(2021)
Article
Engineering, Manufacturing
Jinsheng Fan, Naomi Deneke, Shujia Xu, Brittany Newell, Jose Garcia, Chelsea Davis, Wenzhuo Wu, Richard M. Voyles, Robert A. Nawrocki
Summary: The development of science and technology has simplified the fabrication of functional materials and devices. The EPAM technology provides a new avenue for directly printing piezoelectric materials with improved characteristics.
ADDITIVE MANUFACTURING
(2022)
Review
Crystallography
Linfang Xie, Guoliang Wang, Chao Jiang, Fapeng Yu, Xian Zhao
Summary: PVDF is a semicrystalline organic polymer piezoelectric material with high crystallinity and piezoelectric response level. It exhibits excellent mechanical properties, chemical stability, and biocompatibility as a polymer material, making it suitable for various devices.
Article
Chemistry, Physical
Guanchun Rui, Elshad Allahyarov, Honghu Zhang, Ruipeng Li, Shihai Zhang, Philip L. Taylor, Lei Zhu
Summary: This study investigates the effects of chemical defects and high-power ultrasonication on the piezoelectric performance of poly(vinylidene fluoride) (PVDF). The results show that PVDF with a lower head-to-head and tail-to-tail (HHTT) content exhibits higher melting temperature (Tm) and better piezoelectric performance. Additionally, high-power ultrasonication effectively breaks relaxor-like secondary crystals off from PVDF, further enhancing its piezoelectric performance.
Article
Engineering, Electrical & Electronic
Ponnan Sathiyanathan, Lixin Wu, Thomas Walter Schmidt, Tianyuan Li, Gunasekaran Harini Bhuvaneswari, Hongdoo Kim, Arun Anand Prabu, Kap Jin Kim
Summary: This study investigated the changes in beta-crystalline phase in nanofibers using varying content of sulfonated Poly(phenylidene sulfide) as a filler. Among the different samples, the 5 wt.-% sulfonated Poly(phenylidene sulfide) content exhibited the maximum increase in beta-crystallinity, showing a nucleating effect in the nanofibers.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Physics, Condensed Matter
Seena Mathew, Husna Jan, V. Prasad
Summary: Poly(vinylidene fluoride)/Graphene Oxide (PVDF/GO) composites were prepared using solvent casting and hot pressing. The synthesized and purified GO was characterized using various techniques. XRD, FTIR, and DSC techniques were employed to characterize the composites. The conduction mechanism in the PVDF/GO composites was identified as overlapping large polaron tunneling.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Polymer Science
Maria Guillot-Ferriols, Maria Inmaculada Garcia-Briega, Laia Tolosa, Carlos M. Costa, Senentxu Lanceros-Mendez, Jose Luis Gomez Ribelles, Gloria Gallego Ferrer
Summary: Piezoelectric stimulation promotes pre-differentiation of MSCs, and PVDF-CFO cell culture supports offer a wireless stimulation strategy. MSCs embedded in electroactive microspheres can be locally stimulated. This magnetically activated 3D electroactive cell culture support can be used for pre-differentiation of MSCs before transplantation.
Article
Engineering, Multidisciplinary
Haoran Pei, Yeping Xie, Yu Xiong, Qinniu Lv, Yinghong Chen
Summary: By incorporating TPPC nanoparticles, a high piezoelectric PVDF/TPPC nanocomposite material was fabricated using a novel polarization-free fused filament fabrication (FFF) 3D printing strategy, which achieved a high concentration of polar phase and complex porous structures of the energy harvester. This resulted in significantly increased open-circuit voltage and piezoelectric performance, offering new possibilities for the design and fabrication of piezoelectric energy harvesters.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Physical
Dong Je Han, Seonwoo Kim, Hyeon Jun Heo, Chaewon Jin, Jin-young Kim, Hongsoo Choi, In Jun Park, Hong Suk Kang, Sang Goo Lee, Jong-Chan Lee, Eun-Ho Sohn
Summary: Antimicrobial PVDF-based polymers were prepared by grafting quaternary ammonium or quaternary pyridinium monomers to effectively kill bacteria and yeast. Adding these polymers to PVDF films through blending method enhanced both mechanical properties and antimicrobial performances, while maintaining biocompatibility.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Hao Bao, Yizhou Ma, Jiatai Sun, Qiuying Zhao, Lu Yang, Ying Hou, Haiyan He, Huajie Huang, Hongli Ji, Jinhao Qiu
Summary: The advent of pressure sensors for intelligence terminal devices and skin-inspired electronics has triggered rapid development of flexible, sensitive, and transparent sensing materials. By employing ionic liquids ([EMIM]Cl) additive and a composition-gradient multilayered architecture design, the piezo-response of piezo-active poly(vinylidene fluoride) (PVDF) can be enhanced, resulting in high transparency and sensitivity ILs/PVDF composites that are suitable for reliable pressure sensors.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Biophysics
Mohammadreza Alimohammadi, S. A. Ahmad Ramazani
Summary: The study aimed to improve the bioactivity of PEEK and simulate the piezoelectricity of bone by coating PEEK substrate with a nanocomposite of dispersed PVDF/SPEEK matrix containing nHA and CNF fillers. The modified PEEK showed improved hydrophilicity, better bone-like apatite formation, cell proliferation, and cell attachments. The presence of CNF in the nanocomposite enhanced the material's mechanical properties and piezoelectric performance.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Chemistry, Physical
Benjamin Cromwell, Mara Dubnicka, Lasanthi Sumathirathne, Angela Thach, William B. Euler
Summary: Membranes of PVDF and related polymers are used to decompose RhB under low power sonication, and the change in visible spectrum of RhB allows determination of rate constants for different polymer compositions and membrane thicknesses. The piezoelectric field generated by mechanical deformation of the polymer catalyzes the scission of the C-N bond in RhB. Doping PVDF with transition-metal nitrates increases the rate constants, but the analysis is complicated by concurrent RhB adsorption onto the membrane. A proposed mechanism suggests that the piezocatalytic effect of the membrane leads to heterolytic cleavage of the C-N bond followed by formation of a C-Cl bond on the new xanthene ring.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Zehao Huang, Junye Cheng, Huibin Zhang, Yingfei Xiong, Zhanxin Zhou, Qingbin Zheng, Guangping Zheng, Deqing Zhang, Maosheng Cao
Summary: Hierarchical heterostructures based on VB-group laminated vanadium disulfide nanosheets embedded with cobalt tetroxide nanoparticles were constructed, which showed strong electromagnetic coupling and enhanced microwave absorption performance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Wentao Yang, Sarir Uddin, Arif Zaman, Guangping Zheng
Summary: By doping with Ta5+ or Nb5+ in BNKT-LS ceramics, a lead-free ceramic material with good thermal stability and high energy storage efficiency can be obtained.
Article
Chemistry, Multidisciplinary
Yu Liu, Guangping Zheng
Summary: The present study investigates the interfacial behaviors and mechanical properties of AlCoCrFeNi high-entropy alloy reinforced aluminum matrix composites (AMCs) through first-principles calculations. The stability of the HEA-reinforced AMCs is found to be strongly dependent on the chemical compositions in the interfacial regions. The interfacial energy of the Al(001)/Al20Co19Cr19Fe19Ni19(001) interfaces is calculated to vary, suggesting favorable formation of interfaces at the (100) atomic plane. Ni stabilizes the interface while Al deteriorates its stability. The HEA-reinforced AMCs show improved Young's modulus and meaningful plasticity under tension, which are related to the chemical compositions at the interfaces.
Article
Physics, Condensed Matter
Shujuan Jiang, Guang-ping Zheng
Summary: In this study, a series of Janus XYP2 monolayers with multifunctional properties, including good stability, electronic, mechanical, piezoelectric, and ferromagnetic properties, were predicted based on density functional theory. These materials have potential applications in various fields.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Tian Li, Guangping Zheng
Summary: In this study, a novel type of metallic nano-glasses (NGs) is synthesized, and the effects of glass-glass interfaces (GGIs) and Ni additions on the structural and thermodynamics properties, as well as the magnetism of (Co, Fe, Ni)-P NGs with different average grain sizes (D-avg) are systematically investigated. Results show that the addition of Ni and the reduction of D-avg improve the glass forming abilities of NGs and influence the magnetism of NGs. The soft magnetic properties of (Co, Fe)-P NGs with reduced D-avg are significantly improved compared to micro-structured samples.
Article
Engineering, Electrical & Electronic
Zhuo Han, Tian Li, Guangping Zheng
Summary: Heterogeneous structures of lead-free 0.94(Bi0.5Na0.5)TiO3-0.06BaTiO(3) solid-solution thin film and few-layer graphene oxide (GO) were prepared and investigated for their morphology, piezoelectric properties and electrical energy storage performances. It was found that the electrical breakdown strength of the solid-solution thin film was significantly improved due to the presence of covalently bonded GO nanosheets that could counteract the applied electric field. The heterostructures exhibited outstanding electrical energy storage density up to 4.26 J cm(-3) at elevated temperatures (80-120 degrees C). The results demonstrate that developing dielectrics-GO heterostructures is an effective approach to enhance the energy storage density of dielectric capacitors for practical applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
Shujuan Jiang, Chang Liu, Pengyu Liu, Huabing Yin, Guang-Ping Zheng
Summary: The effects of carrier doping on the magnetic and electronic properties of 2D Janus TiXO systems were investigated using first-principles calculations. It was found that Janus TiXO possesses tunable magnetic properties, making it a promising material for electronics and spintronics applications.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
Article
Chemistry, Physical
Honghan Wang, Huibin Zhang, Junye Cheng, Tingting Liu, Deqing Zhang, Guangping Zheng, Shangru Zhai, Maosheng Cao
Summary: The addition of biomass-based glucose derived carbon (GDC) on the surface of VB-Group transition metal disulfides (TMDs) VS2 nanomaterials enhances their electromagnetic wave (EMW) absorption performance, increases the effective absorption bandwidth (EAB), and improves environmental stability and electronic parameters. The VS2/GDC hybrids exhibit promising potential as candidate materials for tunable EMW absorbers with enhanced absorption performance and environmental stability.
JOURNAL OF MATERIOMICS
(2023)
Article
Materials Science, Multidisciplinary
Yu Liu, Guangping Zheng
Summary: The dislocation plasticity of TiZr-based hexagonal close-packed (HCP) concentrated solid-solution alloys (CSAs) is investigated using a multiscale simulation approach. The addition of Y and Sc in TiZrHf CSAs significantly enhances dislocation-mediated slip. The multiscale simulation approach accurately predicts the mechanical properties of CSAs and elucidates the deformation mechanisms at atomic scales.
Article
Materials Science, Multidisciplinary
X. F. Gong, Z. H. Gao, L. P. Nie, S. Qiu, Q. Yu, H. Wu, G. P. Zheng, Z. B. Jiao
Summary: This study systematically investigated the effects of 3d, 4d, and 5d transition elements on the phase stability, mechanical properties, and deformation behavior of L12 Co-Ti-based alloys using first-principles calculations. The results showed that certain transition elements tend to occupy specific sites, reducing the structural stability of the alloys. The analysis also revealed that the strengthening of the alloys is attributed to the strong covalent character of the Co-M bonds. The study provides insights into the fundamental understanding of multicomponent L12 compounds and offers guidelines for designing superior Co-based superalloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yu Liu, Guang-Ping Zheng
Summary: In this study, the influences of oxygen interstitials and magnetisms on the phase stability and structural transformation of CoCrFeNi high-entropy alloy (HEA) were investigated using first-principles calculations. It was found that oxygen interstitials tend to form at octahedral sites neighboring with more Cr or less Ni in the face-centered cubic (FCC) CoCrFeNiOx HEA. The HEA prefers FCC over hexagonal close-packed (HCP) phases when the oxygen concentration exceeds a certain value, and this structural transformation may be driven by magnetisms. Moreover, the synergy effects of oxygen interstitials and magnetisms facilitate the structural transformation.
PHILOSOPHICAL MAGAZINE
(2023)
Article
Chemistry, Physical
Shujuan Jiang, Guangping Zheng
Summary: Novel two-dimensional Janus GaOClX (X = F, Br, and I) monolayers with superior energy storage properties are predicted based on first-principles calculations. They possess anisotropic carrier mobility, strong mechanical flexibility, and excellent out-of-plane piezoelectricity, making them potential candidates for dielectric capacitors with high energy storage density. The GaOCl monolayer and Janus GaOClX monolayers have been found to exhibit an ultrahigh energy storage density comparable to that of electrochemical supercapacitors and batteries, surpassing other dielectric materials reported so far.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Hassan Raza, Junye Cheng, Cong Lin, Soumyadip Majumder, Guangping Zheng, Guohua Chen
Summary: The development of lithium-sulfur (Li-S) batteries with high energy density and cycling stability is hindered by the slow polysulfide conversion and adverse shuttling effects. Therefore, new electrocatalysts are needed to facilitate the practical applications of Li-S batteries. In this study, a single-phase high-entropy stabilized oxide (Ni0.2Co0.2Cu0.2Mg0.2Zn0.2)O is prepared and integrated into the sulfur host, functioning as both the catalytic converter and chemical inhibitor towards the shuttle species. The resulting cathode exhibits significantly improved discharge capacity and cycling stability compared to other cathodes, demonstrating the potential application of high-entropy oxides (HEOs) in enhancing the performance of Li-S batteries.
Article
Chemistry, Multidisciplinary
Shujuan Jiang, Huabing Yin, Guang-Ping Zheng
Summary: In this study, a novel GaOCl monolayer with excellent stability and wide bandgap is proposed and studied. The material exhibits high mechanical flexibility, anisotropic Poisson's ratio and carrier mobilities, making it suitable for various electronic and optoelectronic applications. Additionally, the GaOCl monolayer shows spontaneous magnetization and outstanding multidirectional piezoelectricity. These characteristics make it a promising candidate for high-performance multifunctional integrated nano-devices.
Article
Chemistry, Physical
Xiaobo Shi, Shujuan Jiang, Xianwei Han, Min Wei, Bing Wang, Gaofeng Zhao, Guang-Ping Zheng, Huabing Yin
Summary: The structural stability, electronic properties, mechanical flexibility, and intrinsic piezoelectricity of InSeBr-type monolayers are comprehensively investigated. The results show that InSeBr-type monolayers exhibit ultrahigh mechanical flexibility and superior piezoelectric response, making them promising for applications in sensors and energy harvesters.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
