Self‐Assembled Epitaxial Ferroelectric Oxide Nanospring with Super‐Scalability (Adv. Mater. 13/2022)

Dong, Guohua; Hu, Yue; Guo, Changqing; Wu, Haijun; Liu, Haixia; Peng, Ruobo; Xian, Dan; Mao, Qi; Dong, Yongqi; Zhao, Yanan; Peng, Bin; Hu, Zhongqiang; Zhang, Junwei; Wang, Xueyun; Hong, Jiawang; Luo, Zhenlin; Ren, Wei; Ye, Zuo‐Guang; Jiang, Zhuangde; Zhou, Ziyao; Huang, Houbing; Peng, Yong; Liu, Ming

doi:10.1002/adma.202270103

Cited by 4 publications

(4 citation statements)

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“…[ 9b ] Interestingly, an external electric field driven reversible folding–unfolding cycles give rise to a giant super‐elastic piezoelectricity in BTO membranes (Figure 3g). [ 31 ] Since then, super‐elasticity has also been observed in multiferroic freestanding BFO and LSMO/BTO films (Figure 3h,i), [ 32–34 ] which provides new opportunities for observing flexoelectric‐related effects or designing flexible electronic devices.…”

Section: Primary Ferroic Properties Tuned To Extreme Structural Condi...mentioning

confidence: 99%

Freestanding Perovskite Oxide Membranes: A New Playground for Novel Ferroic Properties and Applications

Han,

Dong,

Liu

et al. 2023

Adv Funct Materials

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Transition metal perovskite oxide membranes and their unique properties have attracted great attention recently and have been developed into one of the research frontiers in condensed matter physics and materials science. Free of constraint imposed by the underlying substrate, freestanding membranes exhibit extraordinary structural tunability and flexibility far exceeding the bulk materials and epitaxial films clamped on substrates, which substantially extends the explorable regime in the phase diagrams. Moreover, high‐quality oxide membranes, even down to a single unit cell, can be synthesized and stacked/integrated with any materials for novel artificial heterostructures and electronic applications. The exceptional structural tunability and stacking ability in oxide membranes provide new knobs to explore the spontaneous symmetry breaking in oxides, providing a fertile playground for emergent primary ferroic/multiferroic properties and electronic applications. Here, the recent progress is briefly reviewed and the promising outlook for future research in ferroic perovskite oxide membranes and their applications is discussed.

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Section: Primary Ferroic Properties Tuned To Extreme Structural Condi...mentioning

confidence: 99%

Freestanding Perovskite Oxide Membranes: A New Playground for Novel Ferroic Properties and Applications

Han,

Dong,

Liu

et al. 2023

Adv Funct Materials

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“…The mechanical energy from nature can be used to power small electronic devices from around the environment. [ 10–44 ] With the aid of intelligent wearable electronics for functional purposes, energy harvesters converting ambient mechanical energy into electricity have attracted great attention. Commonly, several promising methods can be used to provide energy to run electronic devices, such as electrets by motion, electrostatic from vibration, and electromagnetic with relative speed, while triboelectric energy harvesting with friction can be adopted for healthcare, human–machine interaction, wireless transmission, and self‐charging units for electronics.…”

Section: Introductionmentioning

confidence: 99%

More Than Energy Harvesting in Electret Electronics‐Moving toward Next‐Generation Functional System

Zhu

Yang

Zhang

et al. 2023

Adv Funct Materials

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Electrets are normally applied for energy conversion from mechanical vibration sources in the environment to electrical power without any friction, which induces electric device sustainability and mechanically robust. It functions for electron storage and electrostatic/triboelectric effect, whose electrical/mechanical performance dramatically benefits energy harvesters, self‐powered sensors, and even intelligent/sustainable systems. To summarize the progress of electret‐based electronics, this review proposes three key issues around enhanced energy harvesting toward sensors and sustainable systems. First, with the properties of long‐term charge storage characteristics and the contactless mechanism for energy harvesting, the enhancement effect in electret from MEMS devices, porous microstructure devices, and multilayer electret devices are carefully assessed with the output power from various devices. Second, the multi‐functional applications aspect along with the triboelectric coupling effect and artificial piezoelectric materials are discussed as future electret devices, for example, polydimethylsiloxane materials. Third, more than energy harvesting, machine learning‐enabled methodology in electret electronics can be more reliable and sustainable, dramatically contributing to the living standard of the society. Electret technologies on the future development trends are finally analyzed and strengthened toward multifunctional, sustainable, and intelligent systems along with the upcoming technologies in coupling mechanism, artificial composite materials, and machine learning in data fusion.

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“…[ 5,6 ] Although the rigid mechanical nature of ceramic materials has hindered their utilization in flexible devices, recent observations of abnormal mechanical properties in nanoscale ceramic materials could resolve these issues. Specifically, free‐standing nanoscale oxide thin films exhibit distinguished mechanical properties such as superelasticity [ 7–9 ] and extreme tensile strain endurance, [ 10,11 ] in contrast to brittle bulk ceramics or thin films on substrates. Additionally, the free‐standing thin films can be transferred onto flexible or stretchable substrates, [ 12–14 ] which highly facilitates the integration of these functional oxides into soft robotics and M/NEMS.…”

Section: Introductionmentioning

confidence: 99%

Strain‐Sensitive Flexible Magnetoelectric Ceramic Nanocomposites

Kim

Aktaş

et al. 2023

Adv Materials Technologies

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of abnormal mechanical properties in nanoscale ceramic materials could resolve these issues. Specifically, free-standing nanoscale oxide thin films exhibit distinguished mechanical properties such as superelasticity [7][8][9] and extreme tensile strain endurance, [10,11] in contrast to brittle bulk ceramics or thin films on substrates. Additionally, the free-standing thin films can be transferred onto flexible or stretchable substrates, [12][13][14] which highly facilitates the integration of these functional oxides into soft robotics and M/NEMS.Functional ceramic oxides that show coupling between mechanical, electrical, and magnetic order parameters [15] are appealing for a wide range of applications. Magnetoelectric (ME) composites composed of piezoelectric and magnetostrictive oxides are a clear example of this class of materials, where the coupling is achieved through interfacial elastic interactions. As ME composite oxides can detect magnetic fields and convert them into electric outputs, they have been widely applied in smart sensors, [16,17] memories, [18,19] and biomedical systems. [20] Extending these superior ME devices to flexible systems would require strong ME coupling and excellent elastic mechanical properties. However, these highly functional ME composite oxides have not been incorporated into flexible systems due to their hard and brittle nature in bulk.Here, we realize flexible ME composite oxides by creating BaTiO 3 /CoFe 2 O 4 (BTO/CFO) free-standing epitaxial bilayer thin films. We show these free-standing thin films have large elastic tensile strain (>4%) and can be transferred to flexible substrates, such as polydimethylsiloxane (PDMS), even with Magnetoelectric (ME) oxide materials can convert magnetic input into electric output and vice versa, making them excellent candidates for advanced sensing, data storage, and communication. However, their application has been limited to rigid devices due to their brittle nature. Here, flexible ME oxide composite (BaTiO 3 /CoFe 2 O 4 ) thin film nanostructures with distinct ME coupling coefficients are reported. In contrast to rigid bulk counterparts, these ceramic nanostructures display a flexible behavior after being released from the substrate, and can be transferred onto a stretchable substrate such as polydimethylsiloxane. These ceramic films possess high ME coefficients due to minimized clamping effect and preferred crystalline orientation, and exhibit reversibly tunable ME coupling via mechanical stretching thanks to their large elasticity (>4%). It is believed that the study can open up new avenues for integrating ceramic ME composites into micro-/nanoelectromechanical system and soft robotic devices.

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Self‐Assembled Epitaxial Ferroelectric Oxide Nanospring with Super‐Scalability (Adv. Mater. 13/2022)

Cited by 4 publications

References 0 publications

Freestanding Perovskite Oxide Membranes: A New Playground for Novel Ferroic Properties and Applications

Freestanding Perovskite Oxide Membranes: A New Playground for Novel Ferroic Properties and Applications

More Than Energy Harvesting in Electret Electronics‐Moving toward Next‐Generation Functional System

Strain‐Sensitive Flexible Magnetoelectric Ceramic Nanocomposites

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