Large-area atomic-smooth polyvinylidene fluoride Langmuir-Blodgett film exhibiting significantly improved ferroelectric and piezoelectric responses

He, Shan; Guo, Mengfan; Dan, Zhenkang; Lan, Shun; Ren, Weibin; Zhou, Le; Wang, Yue; Liang, Yuhan; Zheng, Yunpeng; Pan, Jiayu; Shen, Yang

doi:10.1016/j.scib.2021.02.004

Cited by 15 publications

(10 citation statements)

References 58 publications

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“…introduced a simple hot‐pressing approach for producing PVDF LB films on a relatively large scale with an exceptionally smooth surface. [ 207 ] The root mean square roughness of the film is 0.3 nm over a 30 × 30 µm 2 area, which is comparable to that of a metal substrate. Their method maximized the potential of LB technique for controlling thickness distribution.…”

Section: Structure Manipulation Of Pvdf‐based Polymers To Improve Pie...mentioning

confidence: 99%

Recent Progress on Structure Manipulation of Poly(vinylidene fluoride)‐Based Ferroelectric Polymers for Enhanced Piezoelectricity and Applications

Zhang

Zhu

et al. 2023

Adv Funct Materials

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Poly(vinylidene fluoride) (PVDF)‐based polymers demonstrate great potential for applications in flexible and wearable electronics but show low piezoelectric coefficients (e.g., −d33 < 30 pC N−1). The effective improvement for the piezoelectricity of PVDF is achieved by manipulating its semicrystalline structures. However, there is still a debate about which component is the primary contributor to piezoelectricity. Therefore, current methods to improve the piezoelectricity of PVDF can be classified into modulations of the amorphous phase, the crystalline region, and the crystalline–amorphous interface. Here, the basic principles and measurements of piezoelectric coefficients for soft polymers are first discussed. Then, three different categories of structural modulations are reviewed. In each category, the physical understanding and strategies to improve the piezoelectric performance of PVDF are discussed. In particular, the crucial role of the oriented amorphous fraction at the crystalline–amorphous interface in determining the piezoelectricity of PVDF is emphasized. At last, the future development of high performance piezoelectric polymers is outlooked.

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Section: Structure Manipulation Of Pvdf‐based Polymers To Improve Pie...mentioning

confidence: 99%

Recent Progress on Structure Manipulation of Poly(vinylidene fluoride)‐Based Ferroelectric Polymers for Enhanced Piezoelectricity and Applications

Zhang

Zhu

et al. 2023

Adv Funct Materials

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“…[65] In addition to the direct spin-coating method, Langmuir-Blodgett technique is also used for P(VDF-TrFE) film fabrication by depositing uniform molecular monolayers on solid substrates for low voltage operation. [66] To achieve ordered structures and enhanced thermal stability in P(VDF-TrFE) based ferroelectric random access memory (FeRAM), Guo et al fabricated self-assembled P(VDF-TrFE) lamellae array with separated crystal and amorphous phases. [65] Compared to FeRAM devices obtained from spin-coated with thermal endurance of 70 °C, such self-assembled FeRAM exhibits enhanced thermal endurance up to 90 °C.…”

Section: Ferroelectric Copolymer P(vdf-trfe) Filmsmentioning

confidence: 99%

Interface Engineering and Device Applications of 2D Ultrathin Film/Ferroelectric Copolymer P(VDF‐TrFE)

Dang

Guo

et al. 2022

Advanced Physics Research

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Ferroelectric materials with switchable electrical polarization have been widely used in tunnel junctions, non-volatile memories, and field-effect transistors. Large-area organic ferroelectric polymers compatible with silicon or flexible substrates have played a crucial role in nanoelectronics. Poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) as a representative, different from traditional bulk oxide ferroelectrics in terms of atom arrangements and fabrication methods, has frequently been used as the ferroelectric gate for high-performance electronic, optical, and synaptic transistors. Ferroelectric copolymers have gradually become a promising and versatile alternative for inorganic ferroelectrics. This review will focus on the interface engineering and device applications of 2D materials/ferroelectric P(VDF-TrFE) hybrid structures. The intrinsic ferroelectric properties and unique features of P(VDF-TrFE) are first elucidated. Next, typical device structures with ferroelectric gating effect followed by its physical working mechanisms will be discussed. In the next section, diverse nanoelectronics applications of ferroelectric field effect transistors based on P(VDF-TrFE), including optoelectronic devices, non-volatile memories, neuromorphic computing, and negative capacitance transistors, are clarified. Moreover, existing challenges and further development for ferroelectric polymer will be discussed. With an emphasis on the ferroelectric polymer gate and related issues, this review provides a timely summary of current physical understanding and progresses.

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“…Flexible sensors, as a key element of wearable devices [4][5][6], have become one of the research hotspots due to their various promising applications [7,8], such as in human−machine interfaces, electronic skin, timely health monitoring, and soft robotics [9]. Based on the signal transition mechanisms, flexible sensors can be classified into capacitive [10,11], piezoelectric [12], resistive [13,14], and triboelectric types [15,16]. Among these, the capacitive sensors had been widely applied based on the advantages of outstanding temperature insensitivity, low power consumption, rapid dynamic response, and simple architecture design [17].…”

Section: Introductionmentioning

confidence: 99%

All-Fabric-Based Flexible Capacitive Sensors with Pressure Detection and Non-Contact Instruction Capability

Tian

et al. 2022

Coatings

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The flexible and wearable capacitive sensors have captured tremendous interest due to their enormous potential for healthcare monitoring, soft robotics, and human−computer interface. However, despite recent progress, there are still pressing challenges to develop a fully integrated textile sensor array with good comfort, high sensitivity, multisensing capabilities, and ultra-light detection. Here, we demonstrate a pressure and non-contact bimodal fabric-only capacitive sensor with highly sensitive and ultralight detection. The graphene nanoplatelets-decorated multidimensional honeycomb fabric and nickel-plated woven fabric serve as the dielectric layer and electrode, respectively. Our textile-only capacitive bimodal sensor exhibits an excellent pressure-sensing sensitivity of 0.38 kPa−1, an ultralow detection limit (1.23 Pa), and cycling stability. Moreover, the sensor exhibits superior non-contact detection performance with a detection distance of 15 cm and a maximum relative capacitance change of 10%. The sensor can successfully detect human motion, such as finger bending, saliva swallowing, etc. Furthermore, a 4 × 4 (16 units) textile-only capacitive bimodal sensor array was prepared and has excellent spatial resolution and response performance, showing great potential for the wearable applications.

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Large-area atomic-smooth polyvinylidene fluoride Langmuir-Blodgett film exhibiting significantly improved ferroelectric and piezoelectric responses

Cited by 15 publications

References 58 publications

Recent Progress on Structure Manipulation of Poly(vinylidene fluoride)‐Based Ferroelectric Polymers for Enhanced Piezoelectricity and Applications

Recent Progress on Structure Manipulation of Poly(vinylidene fluoride)‐Based Ferroelectric Polymers for Enhanced Piezoelectricity and Applications

Interface Engineering and Device Applications of 2D Ultrathin Film/Ferroelectric Copolymer P(VDF‐TrFE)

All-Fabric-Based Flexible Capacitive Sensors with Pressure Detection and Non-Contact Instruction Capability

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