TY - JOUR
KW - Transmission electron microscopy
KW - Oxide
KW - Alloy
KW - Hysteresis
KW - Atomic force microscopy
KW - Nanotechnology
KW - Electric field
KW - Article
KW - Bismuth
KW - Ferrite
KW - Nanomaterial
KW - Mechanical stress
KW - Particle Size
AU - J Zhang
AU - X Ke
AU - G Gou
AU - J Seidel
AU - B Xiang
AU - P Yu
AU - W.-I Liang
AU - A.M Minor
AU - Y.-H Chu
AU - G Van Tendeloo
AU - X Ren
AU - Ramamoorthy Ramesh
AB - Stimulus-responsive shape-memory materials have attracted tremendous research interests recently, with much effort focused on improving their mechanical actuation. Driven by the needs of nanoelectromechanical devices, materials with large mechanical strain, particularly at nanoscale level, are therefore desired. Here we report on the discovery of a large shape-memory effect in bismuth ferrite at the nanoscale. A maximum strain of up to ∼14% and a large volumetric work density of ∼600±90Jcm-3 can be achieved in association with a martensitic-like phase transformation. With a single step, control of the phase transformation by thermal activation or electric field has been reversibly achieved without the assistance of external recovery stress. Although aspects such as hysteresis, microcracking and so on have to be taken into consideration for real devices, the large shape-memory effect in this oxide surpasses most alloys and, therefore, demonstrates itself as an extraordinary material for potential use in state-of-art nanosystems. © 2013 Macmillan Publishers Limited. All rights reserved.
BT - Nature Communications
DO - 10.1038/ncomms3768
LA - eng
N1 - cited By 62
N2 - Stimulus-responsive shape-memory materials have attracted tremendous research interests recently, with much effort focused on improving their mechanical actuation. Driven by the needs of nanoelectromechanical devices, materials with large mechanical strain, particularly at nanoscale level, are therefore desired. Here we report on the discovery of a large shape-memory effect in bismuth ferrite at the nanoscale. A maximum strain of up to ∼14% and a large volumetric work density of ∼600±90Jcm-3 can be achieved in association with a martensitic-like phase transformation. With a single step, control of the phase transformation by thermal activation or electric field has been reversibly achieved without the assistance of external recovery stress. Although aspects such as hysteresis, microcracking and so on have to be taken into consideration for real devices, the large shape-memory effect in this oxide surpasses most alloys and, therefore, demonstrates itself as an extraordinary material for potential use in state-of-art nanosystems. © 2013 Macmillan Publishers Limited. All rights reserved.
PB - Nature Publishing Group
PY - 2013
T2 - Nature Communications
TI - A nanoscale shape memory oxide
VL - 4
SN - 20411723
ER -