Direct measurement of elastic modulus of InP nanowires with Scanning Probe Microscopy in PeakForce QNM mode

18th International Conference PhysicA.SPb

Geydt, P.^1 ; Dunaevskiy, M.^2,3 ; Alekseev, P.^2 ; Kakko, J.-P.^4 ; Haggrén, T.^4 ; Lähderanta, E.^1 ; Lipsanen, H.^4

Laboratory of Physics, Lappeenranta University of Technology, Lappeenranta

53851, Finland^1

Ioffe Physical Technical Institute, RAS, Saint-Petersburg

194021, Russia^2

National Research University of Information Technologies, Mechanics and Optics (ITMO), Saint-Petersburg

197101, Russia^3

Department of Micro- and Nanosciences, Micronova, Aalto University, P.O. Box 13500, Aalto

FI-00076, Finland^4

关键词: Cone-shaped;    Core-shell model;    Direct measurement;    Elastic properties;    Measuring method;    Peak-force tappings;    Wurtzite phase;    Zinc blende;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/769/1/012029/pdf
DOI  :  10.1088/1742-6596/769/1/012029

来源: IOP

【 摘 要 】

In this manuscript, we present the study of elastic properties of InP nanowires with help of scanning probe microscope in advanced PeakForce Tapping® regime. The measuring method was developed in order to investigate the Young's modulus of these cone-shaped structures with significant accuracy. The difference in InP elasticity for wurtzite phase and zinc- blende phase was revealed. It was shown that elastic modulus of InP nanowires significantly increases from 60 GPa to more than 100 GPa when diameter of a nanowire is reduced below 50 nm. The core-shell model for InP nanowire was used for the explanation of this effect.