TY - JOUR

T1 - Functional NiTi grids for in situ straining in the TEM

AU - Schürmann, Ulrich

AU - Chluba, Christoph

AU - Wolff, Niklas

AU - Smazna, Daria

AU - Lima De Miranda, Rodrigo

AU - Junker, Philipp

AU - Adelung, Rainer

AU - Quandt, Eckhard

AU - Kienle, Lorenz

N1 - Funding information: This work was funded by the German Research Foundation (DFG) as part of the Collaborative Research Center 1261–Magnetoelectric sensors from composite materials to biomagnetic diagnostics (SFB 1261). The authors want to thank Christin Szillus, Matthias Frank, Niko Carstens and Christiane Zamponi for sample preparation. We thank Dustin R. Jantos for the creation of the finite element mesh.

PY - 2017/11

Y1 - 2017/11

N2 - In situ measurements are a pivotal extension of conventional transmission electron microscopy (TEM). By means of the shape memory alloy NiTi thin film Functional Grids were produced for in situ straining as alternative or at least complement of expensive commercial holders. Due to the martensite-austenite transition temperature straining effects can be observed by use of customary heating holders in the range of 50 to 100  °C. The grids can be produced in diversified designs to fit for different strain situations. Micro tensile tests were performed and compared with finite element simulations to estimate the applied forces on the sample and to predict the functionality of different grid designs. As a first example of this Functional Grid technology, we demonstrate the impact of applying a strain to a network of ZnO tetrapods.

AB - In situ measurements are a pivotal extension of conventional transmission electron microscopy (TEM). By means of the shape memory alloy NiTi thin film Functional Grids were produced for in situ straining as alternative or at least complement of expensive commercial holders. Due to the martensite-austenite transition temperature straining effects can be observed by use of customary heating holders in the range of 50 to 100  °C. The grids can be produced in diversified designs to fit for different strain situations. Micro tensile tests were performed and compared with finite element simulations to estimate the applied forces on the sample and to predict the functionality of different grid designs. As a first example of this Functional Grid technology, we demonstrate the impact of applying a strain to a network of ZnO tetrapods.

KW - Finite element simulations

KW - In situ straining

KW - Shape memory alloys

KW - Transmission electron microscopy

KW - ZnO

UR - http://www.scopus.com/inward/record.url?scp=85020508187&partnerID=8YFLogxK

U2 - 10.1016/j.ultramic.2017.06.003

DO - 10.1016/j.ultramic.2017.06.003

M3 - Article

C2 - 28628834

VL - 182

SP - 10

EP - 16

JO - Ultramicroscopy: a journal committed to the advancement of new methods, tools and theories in microscopy

JF - Ultramicroscopy: a journal committed to the advancement of new methods, tools and theories in microscopy

ER -