Wafer-scale heterostructured piezoelectric bio-organic thin films

doi:10.1126/science.abf2155

GSTDTAP > 气候变化

DOI	10.1126/science.abf2155
	Wafer-scale heterostructured piezoelectric bio-organic thin films
	Fan Yang; Jun Li; Yin Long; Ziyi Zhang; Linfeng Wang; Jiajie Sui; Yutao Dong; Yizhan Wang; Rachel Taylor; Dalong Ni; Weibo Cai; Ping Wang; Timothy Hacker; Xudong Wang
	2021-07-16
发表期刊	Science
出版年	2021
英文摘要	Piezoelectric materials enable a reversible conversion between mechanical pressure and electric charge and are useful for sensors, actuators, and high-precision motors. Yang et al. developed a method for making high-quality crystalline thin films of piezoelectric γ-glycine crystals that are grown and refined between layers of polyvinyl alcohol (PVA) (see the Perspective by Berger). The PVA layers are essential to promoting the crystallization of the preferred crystal phase with the polar axis oriented perpendicular to the film plan because of hydrogen bonding at the PVA-glycine interface. The thin films show a macroscopic piezoelectric response and high stability in aqueous environments. The films are water soluble and, when suitably packaged, could be implanted into a biodegradable energy-harvesting device. Science , abf2155, this issue p. [337][1]; see also abj0424, p. [278][2] Piezoelectric biomaterials are intrinsically suitable for coupling mechanical and electrical energy in biological systems to achieve in vivo real-time sensing, actuation, and electricity generation. However, the inability to synthesize and align the piezoelectric phase at a large scale remains a roadblock toward practical applications. We present a wafer-scale approach to creating piezoelectric biomaterial thin films based on γ-glycine crystals. The thin film has a sandwich structure, where a crystalline glycine layer self-assembles and automatically aligns between two polyvinyl alcohol (PVA) thin films. The heterostructured glycine-PVA films exhibit piezoelectric coefficients of 5.3 picocoulombs per newton or 157.5 × 10−3 volt meters per newton and nearly an order of magnitude enhancement of the mechanical flexibility compared with pure glycine crystals. With its natural compatibility and degradability in physiological environments, glycine-PVA films may enable the development of transient implantable electromechanical devices. [1]: /lookup/doi/10.1126/science.abf2155 [2]: /lookup/doi/10.1126/science.abj0424
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/334394
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Fan Yang,Jun Li,Yin Long,et al. Wafer-scale heterostructured piezoelectric bio-organic thin films[J]. Science,2021.
APA	Fan Yang.,Jun Li.,Yin Long.,Ziyi Zhang.,Linfeng Wang.,...&Xudong Wang.(2021).Wafer-scale heterostructured piezoelectric bio-organic thin films.Science.
MLA	Fan Yang,et al."Wafer-scale heterostructured piezoelectric bio-organic thin films".Science (2021).