We report a systematic study of the mechanical response of methylammonium lead triiodide CH3NH3PbI3 nanowires by employing bending measurements using atomic force microscope on suspended wires over photo-lithographically patterned channels. Force-deflection curves measured at room temperature give a Young's modulus between 2 and 14 GPa. This broad range of values is attributed to the variations in the microcrystalline texture of halide perovskite nanowires. The mechanical response of a highly crystalline nanowire is linear with force and has a brittle character. The braking modulus of 48 ± 20 MPa corresponds to 100 μm of radius of curvature of the nanowires, rendering them much better structures for flexible devices than spin coated films. The measured moduli decrease rapidly if the NW is exposed to water vapor.
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12 March 2018
Research Article|
March 12 2018
Mechanical response of CH3NH3PbI3 nanowires
L. Ćirić;
L. Ćirić
1
Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne
, 1015 Lausanne, Switzerland
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K. Ashby;
K. Ashby
a)
1
Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne
, 1015 Lausanne, Switzerland
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T. Abadie;
T. Abadie
1
Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne
, 1015 Lausanne, Switzerland
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M. Spina;
M. Spina
1
Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne
, 1015 Lausanne, Switzerland
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M. Duchamp;
M. Duchamp
2
School of Materials Science and Engineering, Nanyang Technological University
, Singapore
639798
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B. Náfrádi;
B. Náfrádi
1
Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne
, 1015 Lausanne, Switzerland
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M. Kollár;
M. Kollár
1
Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne
, 1015 Lausanne, Switzerland
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L. Forró;
L. Forró
1
Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne
, 1015 Lausanne, Switzerland
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E. Horváth
E. Horváth
1
Laboratory of Physics of Complex Matter, Ecole Polytechnique Fédérale de Lausanne
, 1015 Lausanne, Switzerland
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a)
K. Ashby is an exchange student from University of Nottingham.
Appl. Phys. Lett. 112, 111901 (2018)
Article history
Received:
January 21 2018
Accepted:
February 26 2018
Citation
L. Ćirić, K. Ashby, T. Abadie, M. Spina, M. Duchamp, B. Náfrádi, M. Kollár, L. Forró, E. Horváth; Mechanical response of CH3NH3PbI3 nanowires. Appl. Phys. Lett. 12 March 2018; 112 (11): 111901. https://doi.org/10.1063/1.5023115
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