Flexible multi‐state nonvolatile antiferroelectric memory

Li, Lisha; Cai, Yuanyuan; Chen, Xin; Liu, Zhen; Yuan, Guoliang; Wang, Yaojin

doi:10.1111/jace.18585

Cited by 11 publications

(8 citation statements)

References 29 publications

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“…The phenomenon was attributed to the effect of gelatin, which was discussed previously, and also the addition of hydroxyapatite. Since hydroxyapatite uniformly distributed in the solution of freezing‐gelation process, it could serve as the nucleus for the formation of ice crystal, 42 subsequently the formation of large pores was more likely to happen.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of polycaprolactone scaffolds filled with cell‐compatible porous matrix for enhanced cell growth for biomedical applications

Hsu

Lin

et al. 2023

J of Applied Polymer Sci

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In this study, polycaprolactone (P) scaffolds are fabricated by 3D‐printing method, and subsequently a mixed solution of natural‐biocompatible chitosan (C), gelatin (G), and hydroxyapatite (H) is filled into the pores of P scaffolds. Freeze‐gelation method is then carried out to successfully form a cell‐compatible porous CGH matrix within P scaffold pores, obtaining a newly fabricated scaffold called CGH/P composite scaffold which has large specific surface area favorable for cell attachment and growth. The effects of slow cooling (sc) and fast cooling (fc) modes utilized in freeze process on pore structures of CGH matrix are observed via SEM. The use of fc mode creates a CGH matrix with a laminar structure which benefits nutrient permeation and cell migration. Mechanical properties tests indicate that the maximum compressive strength and Young's modulus of CGH/P‐fc scaffolds are 2–7 and 15–35 MPa, respectively. Cell compatibility tests show that on day 7, the cell numbers in the CGH/P‐fc scaffolds are about twofold of those in the P scaffolds, and the cell activities in the CGH/P‐fc scaffolds are even higher, indicating that the presence of laminar porous CGH matrix within P scaffold pores substantially enhances the migration, attachment, and growth of cells in the scaffolds. The results suggest that the fabricated CGH/P‐fc composite scaffold is highly promising for biomedical applications such as bone repair in the future.

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Section: Resultsmentioning

confidence: 99%

Fabrication of polycaprolactone scaffolds filled with cell‐compatible porous matrix for enhanced cell growth for biomedical applications

Hsu

Lin

et al. 2023

J of Applied Polymer Sci

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“…In addition, they can also respond to environmental mechanical vibrations or external stimuli, broadening the application of flexible piezoelectric devices in other fields [8,42]. In recent years, there have been many reviews summarizing the related progress of flexible polymer-based piezoelectric materials and composites, e.g., poly(vinylidene fluoride) (PVDF) [26,[43][44][45]. However, the output performance of the piezoelectric polymers/composites is generally poor, and it is far from completely replacing the role of the inorganic piezoelectric materials.…”

Section: Introduction mentioning

confidence: 99%

Flexible inorganic piezoelectric functional films and their applications

Zhen¹,

Liu²,

Yao³

et al. 2023

Journal of Advanced Ceramics

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Piezoelectric materials play an increasingly important role in energy harvesters, sensors, and actuators. Flexible and thin piezoelectric films have been demonstrated to provide advanced functionalities and improved performances. However, the research on flexible inorganic piezoelectric thin films has rarely been systematically summarized. Here, we summarize the recent advances in the flexible inorganic piezoelectric thin films, focusing on their structural designs, fabrication techniques, and applications in various practical scenarios. Specifically, different fabrication techniques suitable for diverse inorganic piezoelectric nanostructures are reviewed, including sol-gel, hydrothermal, electrospinning, and other techniques, and the integration process with flexible substrates is further discussed. Biomedical and industrial applications of the flexible piezoelectric thin films are emphasized. Finally, some existing challenges and future perspectives are discussed.

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“…They also exhibit a large electric polarization response at the high electric field and weak remnant polarization at the zero field. Those characteristics make them suitable for a wide range of applications in actuation, energy storage [10][11][12] , memory devices 13 , solid-state refrigeration 14 and thermal switches 15 , etc. These extraordinary performances are usually achieved in AFE single-crystals or AFE epitaxial thin films.…”

mentioning

confidence: 99%

“…To meet the demand for next-generation flexible electronic devices, it is necessary to manufacture AFE single-crystalline oxides as flexible as metals and polymers. Traditionally, the widely studied flexible AFE oxide thin films are those deposited directly on metal foils 16,17 and mica [11][12][13]18 substrates. However, they either have poor crystallinity or their flexibility is constrained by the substrate, with a maximum bending strain far below 1% 11,16,19 .…”

mentioning

confidence: 99%

Remarkable flexibility in freestanding single-crystalline antiferroelectric PbZrO3 membranes

Guo,

Peng,

et al. 2024

Nat Commun

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The ultrahigh flexibility and elasticity achieved in freestanding single-crystalline ferroelectric oxide membranes have attracted much attention recently. However, for antiferroelectric oxides, the flexibility limit and fundamental mechanism in their freestanding membranes are still not explored clearly. Here, we successfully fabricate freestanding single-crystalline PbZrO3 membranes by a water-soluble sacrificial layer technique. They exhibit good antiferroelectricity and have a commensurate/incommensurate modulated microstructure. Moreover, they also have good shape recoverability when bending with a small radius of curvature (about 2.4 μm for the thickness of 120 nm), corresponding to a bending strain of 2.5%. They could tolerate a maximum bending strain as large as 3.5%, far beyond their bulk counterpart. Our atomistic simulations reveal that this remarkable flexibility originates from the antiferroelectric-ferroelectric phase transition with the aid of polarization rotation. This study not only suggests the mechanism of antiferroelectric oxides to achieve high flexibility but also paves the way for potential applications in flexible electronics.

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Flexible multi‐state nonvolatile antiferroelectric memory

Cited by 11 publications

References 29 publications

Fabrication of polycaprolactone scaffolds filled with cell‐compatible porous matrix for enhanced cell growth for biomedical applications

Fabrication of polycaprolactone scaffolds filled with cell‐compatible porous matrix for enhanced cell growth for biomedical applications

Flexible inorganic piezoelectric functional films and their applications

Remarkable flexibility in freestanding single-crystalline antiferroelectric PbZrO3 membranes

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