Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Giant piezoelectricity on Si for hyperactive MEMS



S. H. Baek, J. Park, D. M. Kim, Vladimir Aksyuk, R. R. Das, S. D. Bu, D. A. Felker, J. Lettieri, V Vaithyanathan, S. Bharadwaja, N. Bassiri-Gharb, Y. B. Chen, H. P. Sun, C. M. Folkman, H. W. Jang, D. J. Kreft, S K. Streiffer, R. Ramesh, X Q. Pan, S Trolier-McKinstry, Darrell G. Schlom, M. S. Rzchowski, R. Blick, C. B. Eom


Smart materials that can sense, manipulate, and position are crucial to the functionality of micro- and nano-machines [1-2]. Integration of single crystal piezoelectric films on silicon offers the opportunity of high performance piezoelectric microelectromechanical systems (MEMS) incorporating all the advantages of large scale integration on silicon substrates with on-board electronic circuits, improving performance and eliminating common failure points associated with heterogeneous integration [3-6]. We have fabricated oxide heterostructures with the highest piezoelectric coefficients (e31= -29 C/m2) and figure of merit for piezoelectric energy harvesting system ( e31, f 2 r = 0.44 C2/m4) ever realized on silicon substrates by synthesizing epitaxial thin films of Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) on vicinal (001) Si wafers using an epitaxial (001) SrTiO3 template layer. We have also demonstrated fabrication of PMN-PT cantilevers, whose mechanical behavior is consistent with theoretical calculations using the material constants of a bulk PMN-PT single crystal. These epitaxial heterostructures with giant piezoelectricity can be used for Micro and Nano Electro Mechanical Systems (MEMS and NEMS) that function with low drive voltage such as transducers for ultrasound medical imaging, micro-fluidic control and energy harvesting. Beyond electromechanical devices, our approach will open a new avenue to tune and modulate the properties of other multifunctional materials by dynamic strain control.


Baek, S. , Park, J. , Kim, D. , Aksyuk, V. , Das, R. , Bu, S. , Felker, D. , Lettieri, J. , Vaithyanathan, V. , Bharadwaja, S. , Bassiri-Gharb, N. , Chen, Y. , Sun, H. , Folkman, C. , Jang, H. , Kreft, D. , Streiffer, S. , Ramesh, R. , Pan, X. , Trolier-McKinstry, S. , Schlom, D. , Rzchowski, M. , Blick, R. and Eom, C. (2011), Giant piezoelectricity on Si for hyperactive MEMS, Science, [online], (Accessed April 15, 2024)
Created November 17, 2011, Updated October 12, 2021