Active self-assembly of piezoelectric biomolecular films via synergistic nanoconfinement and in-situ poling

Zhuomin Zhang, Xuemu Li, Zehua Peng, Xiaodong Yan, Shiyuan Liu, Ying Hong, Yao Shan, Xiaote Xu, Lihan Jin, Bingren Liu, Xinyu Zhang, Yu Chai, Shujun Zhang (), Alex K.-Y. Jen () and Zhengbao Yang ()
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Zhuomin Zhang: Hong Kong University of Science and Technology, Clear Water Bay
Xuemu Li: Hong Kong University of Science and Technology, Clear Water Bay
Zehua Peng: Hong Kong University of Science and Technology, Clear Water Bay
Xiaodong Yan: Hong Kong University of Science and Technology, Clear Water Bay
Shiyuan Liu: Hong Kong University of Science and Technology, Clear Water Bay
Ying Hong: Hong Kong University of Science and Technology, Clear Water Bay
Yao Shan: Hong Kong University of Science and Technology, Clear Water Bay
Xiaote Xu: Hong Kong University of Science and Technology, Clear Water Bay
Lihan Jin: City University of Hong Kong
Bingren Liu: City University of Hong Kong
Xinyu Zhang: City University of Hong Kong
Yu Chai: City University of Hong Kong
Shujun Zhang: University of Wollongong
Alex K.-Y. Jen: City University of Hong Kong
Zhengbao Yang: Hong Kong University of Science and Technology, Clear Water Bay

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Piezoelectric biomaterials have attracted great attention owing to the recent recognition of the impact of piezoelectricity on biological systems and their potential applications in implantable sensors, actuators, and energy harvesters. However, their practical use is hindered by the weak piezoelectric effect caused by the random polarization of biomaterials and the challenges of large-scale alignment of domains. Here, we present an active self-assembly strategy to tailor piezoelectric biomaterial thin films. The nanoconfinement-induced homogeneous nucleation overcomes the interfacial dependency and allows the electric field applied in-situ to align crystal grains across the entire film. The β-glycine films exhibit an enhanced piezoelectric strain coefficient of 11.2 pm V−1 and an exceptional piezoelectric voltage coefficient of 252 × 10−3 Vm N−1. Of particular significance is that the nanoconfinement effect greatly improves the thermostability before melting (192 °C). This finding offers a generally applicable strategy for constructing high-performance large-sized piezoelectric bio-organic materials for biological and medical microdevices.

Date: 2023
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DOI: 10.1038/s41467-023-39692-y

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