Young’s modulus of [111] germanium nanowires

Journal Article · Sun Nov 01 00:00:00 EDT 2015 · APL Materials

DOI:https://doi.org/10.1063/1.4935060· OSTI ID:22499217

Maksud, M.; Palapati, N. K. R.; Yoo, J. ^[1]; Harris, C. T. ^[2]

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1. Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

This paper reports a diameter-independent Young’s modulus of 91.9 ± 8.2 GPa for [111] Germanium nanowires (Ge NWs). When the surface oxide layer is accounted for using a core-shell NW approximation, the YM of the Ge core approaches a near theoretical value of 147.6 ± 23.4 GPa. The ultimate strength of a NW device was measured at 10.9 GPa, which represents a very high experimental-to-theoretical strength ratio of ∼75%. With increasing interest in this material system as a high-capacity lithium-ion battery anode, the presented data provide inputs that are essential in predicting its lithiation-induced stress fields and fracture behavior.

• OSTI ID: 22499217
• Journal Information: APL Materials, Vol. 3, Issue 11; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2166-532X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANODES
GERMANIUM
LITHIUM ION BATTERIES
NANOWIRES
OXIDES
STRESSES
ULTIMATE STRENGTH