Permanent ferroelectric retention of BiFeO3 mesocrystal

Hsieh, Y. H.; Xue, Fei; Yang, Tiannan; Liu, Heng Jui; Zhu, Yuanmin; Chen, Yi Chun; Zhan, Qian; Duan, Chun Gang; Chen, Lei; He, Qing; Chu, Ying Hao

doi:10.1038/ncomms13199

Cited by 53 publications

(22 citation statements)

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“…2h), suggesting robust stability. The super-long retention time is comparable to the longest retention time of classical perovskite-type oxide ferroelectrics electrically poled by a scanning probe 50,51 .…”

Section: Resultsmentioning

confidence: 78%

Ion adsorption-induced reversible polarization switching of a van der Waals layered ferroelectric

et al. 2021

Nat Commun

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Solid-liquid interface is a key concept of many research fields, enabling numerous physical phenomena and practical applications. For example, electrode-electrolyte interfaces with electric double layers have been widely used in energy storage and regulating physical properties of functional materials. Creating a specific interface allows emergent functionalities and effects. Here, we show the artificial control of ferroelectric-liquid interfacial structures to switch polarization states reversibly in a van der Waals layered ferroelectric CuInP2S6 (CIPS). We discover that upward and downward polarization states can be induced by spontaneous physical adsorption of dodecylbenzenesulphonate anions and N,N-diethyl-N-methyl-N-(2-methoxyethyl)-ammonium cations, respectively, at the ferroelectric-liquid interface. This distinctive approach circumvents the structural damage of CIPS caused by Cu-ion conductivity during electrical switching process. Moreover, the polarized state features super-long retention time (>1 year). The interplay between ferroelectric dipoles and adsorbed organic ions has been studied systematically by comparative experiments and first-principles calculations. Such ion adsorption-induced reversible polarization switching in a van der Waals ferroelectric enriches the functionalities of solid-liquid interfaces, offering opportunities for liquid-controlled two-dimensional ferroelectric-based devices.

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Section: Resultsmentioning

confidence: 78%

Ion adsorption-induced reversible polarization switching of a van der Waals layered ferroelectric

et al. 2021

Nat Commun

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“…This work BFO/LNO mixed region, Diameter 140 nm [31] BFO/LNO mixed region, Diameter 95 nm [31] BFO/LNO T matrix, Diameter 95 nm [31] BFO/LNO unstrained, Diameter 80 nm [31] BFO/SRO R matrix, Diameter 225 nm [29] All the figure legends are for decay trend (e.g., 79.4 nm at t = 0 h and 79.1 nm at t = 8900 h). In addition, concomitant with the switched domains, some bright needle-like structures that exhibit higher piezoresponse than the matrix are formed around.…”

Section: Resultsmentioning

confidence: 99%

“…It is suggested that the in-plane (IP) periodic elastic potentials at the R/T mixed boundaries act as pining centres to maintain domain stability. In another work, (111)-oriented BFO mesocrystals were grown within a stiff matrix of CoFe 2 O 4 31 . This matrix can mechanically clamp the BFO mesocrystals, thereby suppressing the ferroelectric relaxation process.…”

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confidence: 99%

Superior polarization retention through engineered domain wall pinning

et al. 2020

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Ferroelectric materials possess a spontaneous polarization that is switchable by an electric field. Robust retention of switched polarization is critical for non-volatile nanoelectronic devices based on ferroelectrics, however, these materials often suffer from polarization relaxation, typically within days to a few weeks. Here we exploit designer-defect-engineered epitaxial BiFeO 3 films to demonstrate polarization retention with virtually no degradation in switched nanoscale domains for periods longer than 1 year. This represents a more than 2000% improvement over the best values hitherto reported. Scanning probe microscopybased dynamic switching measurements reveal a significantly increased activation field for domain wall movement. Atomic resolution scanning transmission electron microscopy indicates that nanoscale defect pockets pervade the entire film thickness. These defects act as highly efficient domain wall pinning centres, resulting in anomalous retention. Our findings demonstrate that defects can be exploited in a positive manner to solve reliability issues in ferroelectric films used in functional devices.

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“…Besides photovoltaics effect, bandgap of BFO nanomaterials lying in the visible-light region of the solar spectrum extends its horizons to the field of photocatalysis, especially the BFO nanostructures. Great catalytic properties of BFO nanostructures were found on different dyes such as methyl orange [ 116 , 117 ], Rhodamine B [ 118 , 119 ], and methylene blue [ 36 , 120 ]. Many factors affect the photocatalysis behavior, such as size effect, morphologies, and the addition of a proper dopant.…”

Section: Properties Of Bfomentioning

confidence: 99%