Mechanical response of CH 3 NH 3 PbI 3 nanowires

Mechanical response of CH 3 NH 3 PbI 3 nanowires

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...

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Bibliographic Details
Main Authors: Ćirić, L., Ashby, K., Abadie, T., Spina, M., Duchamp, Martial, Náfrádi, B., Kollár, M., Forró, L., Horváth, E.
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2019
Subjects:
Spin Coating
Nanotubes
DRNTU::Engineering::Materials
Online Access:https://hdl.handle.net/10356/82995
http://hdl.handle.net/10220/47552
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Institution: Nanyang Technological University
Language: English
Description
Summary: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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