	US 12,490,657 B2
	Piezoelectric bio-organic films and fabrication method thereof
Zhengbao Yang, Hong Kong (CN); Zhuomin Zhang, Hong Kong (CN); and Xuemu Li, Hong Kong (CN)
Assigned to City University of Hong Kong, Hong Kong (CN)
Filed by City University of Hong Kong, Hong Kong (CN)
Filed on May 4, 2022, as Appl. No. 17/661,925.
Prior Publication US 2023/0363283 A1, Nov. 9, 2023
Int. Cl. H10N 30/857 (2023.01); B29C 41/00 (2006.01); C08J 5/18 (2006.01); C08K 5/17 (2006.01); H10N 30/077 (2023.01); H10N 30/098 (2023.01)

CPC H10N 30/857 (2023.02) [B29C 41/006 (2013.01); C08J 5/18 (2013.01); C08K 5/175 (2013.01); H10N 30/077 (2023.02); H10N 30/098 (2023.02); B29K 2995/0003 (2013.01); C08K 2201/001 (2013.01)]

17 Claims

1. A piezoelectric bio-organic film comprising compact nanocrystals of one or more biomaterials formed by homogenous nucleation and in-situ electric field, the nanocrystals having an average grain size between 100 and 800 nm, and the piezoelectric bio-organic film having a piezoelectric strain constant from 5 to 15 pm/V, piezoelectric voltage constant of at least 150×10⁻³V m/N, and a relative permittivity of less than 10, wherein the one or more biomaterials constituting the compact nanocrystals include one or more materials of glycine, L-alanine, DL-alanine, DL-threonine, DL-leucine, or L-Phenylalanine-L Phenylalanine.