Effect of crystal structure on the Young's modulus of GaP nanowires

被引：3

作者：

Alekseev, Prokhor A. ^{[1
]}

Borodin, Bogdan R. ^{[1
]}

Geydt, Pavel ^{[2
,3
]}

Khayrudinov, Vladislav ^{[4
]}

Bespalova, Kristina ^{[3
,5
]}

Kirilenko, Demid A. ^{[1
]}

Reznik, Rodion R. ^{[6
]}

Nashchekin, Alexey, V ^{[1
]}

Haggren, Tuomas ^{[4
]}

Lahderanta, Erkki ^{[3
]}

Cirlin, George E. ^{[6
,7
]}

Lipsanen, Harri ^{[4
]}

Dunaevskiy, Mikhail S. ^{[1
]}

机构：

[1] Ioffe Inst, St Petersburg 194021, Russia

[2] Novosibirsk State Univ, Phys Fac, Novosibirsk 630090, Russia

[3] LUT Univ, Dept Phys, FI-53850 Lappeenranta, Finland

[4] Aalto Univ, Dept Elect & Nanoengn, Micronova, FI-00076 Espoo, Finland

[5] Aalto Univ, Dept Elect Engn & Automat, FI-02150 Espoo, Finland

[6] St Petersburg State Univ, St Petersburg 199034, Russia

[7] Alferov Univ, St Petersburg 194021, Russia

来源：

NANOTECHNOLOGY | 2021年 / 32卷 / 38期

基金：

俄罗斯科学基金会;

关键词：

GaP; nanowire; atomic force microscopy; WZ; ZB; Young's modulus; bending; III-V NANOWIRES; MECHANICAL-PROPERTIES; GAAS NANOWIRES; WURTZITE; RESONANCE; STRESS; CELL;

D O I：

10.1088/1361-6528/ac0ac7

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Young's modulus of tapered mixed composition (zinc-blende with a high density of twins and wurtzite with a high density of stacking faults) gallium phosphide (GaP) nanowires (NWs) was investigated by atomic force microscopy. Experimental measurements were performed by obtaining bending profiles of as-grown inclined GaP NWs deformed by applying a constant force to a series of NW surface locations at various distances from the NW/substrate interface. Numerical modeling of experimental data on bending profiles was done by applying Euler-Bernoulli beam theory. Measurements of the nano-local stiffness at different distances from the NW/substrate interface revealed NWs with a non-ideal mechanical fixation at the NW/substrate interface. Analysis of the NWs with ideally fixed base resulted in experimentally measured Young's modulus of 155 +/- 20 GPa for ZB NWs, and 157 +/- 20 GPa for WZ NWs, respectively, which are in consistence with a theoretically predicted bulk value of 167 GPa. Thus, impacts of the crystal structure (WZ/ZB) and crystal defects on Young's modulus of GaP NWs were found to be negligible.

引用

页数：8

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