Mechanical response of CH3NH3PbI3nanowires

We report a systematic study of the mechanical response of methylammonium lead triiodideCH3NH3PbI3 nanowires by employing bending measurementsusing atomic force microscope on suspended wires over photo-lithographically patternedchannels. Force-deflection curves measured at room temperature give a Yo...

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Bibliographic Details
Published in:	Applied physics letters Vol. 112; no. 11
Main Authors:	Ćirić, L, Ashby, K, Abadie, T, Spina, M, Duchamp, M, Náfrádi, B, Kollár, M, ró, L, Horváth, E
Format:	Journal Article
Language:	English
Published:	Melville American Institute of Physics 12-03-2018
Subjects:	Applied physics Atomic force microscopy Mechanical analysis Nanowires Perovskites Radius of curvature Water vapor
Online Access:	Get full text
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Summary:	We report a systematic study of the mechanical response of methylammonium lead triiodideCH3NH3PbI3 nanowires by employing bending measurementsusing atomic force microscope on suspended wires over photo-lithographically patternedchannels. Force-deflection curves measured at room temperature give a Young's modulusbetween 2 and 14 GPa. This broad range of values is attributed to the variations in themicrocrystalline texture of halide perovskite nanowires. The mechanical response of ahighly crystalline nanowire is linear with force and has a brittle character. The brakingmodulus of 48 ± 20 MPa corresponds to 100 μm of radius of curvature ofthe nanowires, rendering them much better structures for flexible devices than spin coatedfilms. The measured moduli decrease rapidly if the NW is exposed to water vapor.
ISSN:	0003-6951 1077-3118