Reliable and cost effective design of intermetallic Ni 2 Si nanowires and direct characterization of its mechanical properties

Seung Zeon Han, Joonhee Kang, Sung Dae Kim, Si Young Choi, Hyung Giun Kim, Jehyun Lee, Kwangho Kim, Sung Hwan Lim, Byungchan Han

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


We report that a single crystal Ni2 Si nanowire (NW) of intermetallic compound can be reliably designed using simple three-step processes: casting a ternary Cu-Ni-Si alloy, nucleate and growth of Ni2 Si NWs as embedded in the alloy matrix via designing discontinuous precipitation (DP) of Ni2 Si nanoparticles and thermal aging, and finally chemical etching to decouple the Ni2 Si NWs from the alloy matrix. By direct application of uniaxial tensile tests to the Ni2 Si NW we characterize its mechanical properties, which were rarely reported in previous literatures. Using integrated studies of first principles density functional theory (DFT) calculations, high-resolution transmission electron microscopy (HRTEM), and energy-dispersive X-ray spectroscopy (EDX) we accurately validate the experimental measurements. Our results indicate that our simple three-step method enables to design brittle Ni2 Si NW with high tensile strength of 3.0 GPa and elastic modulus of 60.6GPa. We propose that the systematic methodology pursued in this paper significantly contributes to opening innovative processes to design various kinds of low dimensional nanomaterials leading to advancement of frontiers in nanotechnology and related industry sectors.

Original languageEnglish
Article number15050
JournalScientific reports
Publication statusPublished - 2015 Oct 12

Bibliographical note

Funding Information:
This work was supported principally by the Global Frontier R&D Program (2013M3A6B1078874 and 2013M3A6B1078882) on Global Frontier Hybrid Interface Materials R&D Center funded by the Ministry of Science, ICT and Future Planning and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) [No. 2011-0030058].

All Science Journal Classification (ASJC) codes

  • General


Dive into the research topics of 'Reliable and cost effective design of intermetallic Ni 2 Si nanowires and direct characterization of its mechanical properties'. Together they form a unique fingerprint.

Cite this