Method for probing flexoelectric response of free-standing cantilever beams by nanometric oscillations with nanoindentation technique

Coy, L.E.

doi:10.1016/j.measurement.2020.107986

Cited by 2 publications

(1 citation statement)

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“…A new method of measuring flexoelectric response on freestanding cantilever beams by using nanoindentation instrumentation has been presented. [4] The measured flexoelectric response of ferroelectric ceramics is usually several orders of magnitude larger than the theoretically calculated response. [5] Flexoelectricity has aroused more and more interest due to the fact that flexoelectricity is the fourth rank tensor and appliable for nano-scale devices under certain conditions.…”

Section: Introductionmentioning

confidence: 83%

Prediction of flexoelectricity in BaTiO₃ using molecular dynamics simulations

et al. 2023

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The flexoelectric effect, referred as the strain gradient induced polarization, widely exists in dielectric materials, but few research groups so far have reported its molecular dynamics studies. In this study, the radial distribution function of BaTiO3 and the phase transition temperatures have been researched, which showed that the core-shell potential model is effective and the structure of BaTiO3 is stable in 10-150 K. Simulated hysteresis loops of BaTiO3 by molecular dynamics show that anisotropy can play an important role in the coercive field. Based on the rational simulation process, the cantilever beam bent angle and fixed length effects on the polarization were focused and analyzed. It was found that the small bent angle of the curved cantilever beam can give a proportional relationship with a fixed end length and a non-linear relationship is present when the bent angle is much larger. The prediction of flexoelectric coefficient in BaTiO3 is 18.5 nC/m. This work provides a computational framework for the study of flexoelectric effect using molecular dynamics.

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Section: Introductionmentioning

confidence: 83%

Prediction of flexoelectricity in BaTiO₃ using molecular dynamics simulations

et al. 2023

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Fundamentals of Flexoelectricity, Materials and Emerging Opportunities Toward Strain‐Driven Nanocatalysts

Kołodziej,

Ojha,

Budziałowski

et al. 2024

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Flexoelectricity, an intrinsic property observed in materials under nonuniform deformation, entails a coupling between polarization and strain gradients. Recent catalyst advancements have reignited interest in flexoelectricity, particularly at the nanoscale, where pronounced strain gradients promote robust flexoelectric effects. This paper comprehensively examines flexoelectricity, encompassing methodologies for precise measurement, elucidating its distinctions from related phenomena, and exploring its potential applications in augmenting catalytic properties. So far, the greatest potentials are based on lead strontium titanate (PST) and other metallic titanates such as titania (TiO2), strontium titanate (STO), barium strontium titanate (BST) sulfates (MoS2, ZnS) and halide perovskites (with archetype XPbI3). This review explores the promise of flexoelectric properties in addressing material and photocatalytic challenges, such as charge carrier recombination and ineffective surface charge separation. Additionally, it sheds light on the synergy with emerging paradigms like photo‐flexo catalysis and synergistic flexo‐piezo catalysis, specifically focusing on selective chemical transformations like green hydrogen production. Current limitations related to the usage of photoflexoelectricity for photocatalysis are mostly the stability of the used substance (susceptibility to photodegradation) or the voltage values, which represent the inferior potential for specific practical applications. This work underscores the indispensable role of flexoelectricity in catalysis and its capacity to steer future research and technological advancement.

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Method for probing flexoelectric response of free-standing cantilever beams by nanometric oscillations with nanoindentation technique

Cited by 2 publications

References 31 publications

Prediction of flexoelectricity in BaTiO₃ using molecular dynamics simulations

Prediction of flexoelectricity in BaTiO₃ using molecular dynamics simulations

Fundamentals of Flexoelectricity, Materials and Emerging Opportunities Toward Strain‐Driven Nanocatalysts

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Method for probing flexoelectric response of free-standing cantilever beams by nanometric oscillations with nanoindentation technique

Cited by 2 publications

References 31 publications

Prediction of flexoelectricity in BaTiO3 using molecular dynamics simulations

Prediction of flexoelectricity in BaTiO3 using molecular dynamics simulations

Fundamentals of Flexoelectricity, Materials and Emerging Opportunities Toward Strain‐Driven Nanocatalysts

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Prediction of flexoelectricity in BaTiO₃ using molecular dynamics simulations

Prediction of flexoelectricity in BaTiO₃ using molecular dynamics simulations