Journal
NANO RESEARCH
Volume 10, Issue 7, Pages 2311-2320Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1424-7
Keywords
kinked nanowires; single-crystalline; nonpolar axial growth; wurtzite; MnSe
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Funding
- National Natural Science Foundation of China [91227202, 21673100, 11504126]
- RFDP [20120061130006]
- Changbai Mountain scholars program [2013007]
- Program for Innovative Research Team (in Science and Technology) in University of Jilin Province
- China Postdoctoral Science Foundation [2014M561281]
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The search for a novel strategy to sculpt semiconductor nanowires (NWs) at the atomistic scale is crucial for the development of new paradigms in optics, electronics, and spintronics. Thus far, the fabrication of single-crystalline kinked semiconductor NWs has been achieved mainly through the vapor-liquid-solid growth technique. In this study, we developed a new strategy for sculpting single-crystalline kinked wurtzite (WZ) MnSe NWs by triggering the nonpolar axial-oriented growth, thereby switching-at the atomistic scale-the NW growth orientation along the nonpolar axes in a facile solution-based procedure. This presents substantial challenges owing to the dominant polar c axis growth in the solution-based synthesis of one-dimensional WZ nanocrystals. More significantly, the ability to continuously switch the nonpolar axial-growth orientation allowed us to craft the kinking landscape of types 150 degrees, 120 degrees, 90 degrees, and 60 degrees. A probabilistic analysis of kinked MnSe NWs reveals the correlations of the synergy and interplay between these two sets of nonpolar axial growth-orientation switching, which determine the actual kinked motifs. Furthermore, discriminating the side-facet structures of the kinked NWs significantly strengthened the spatially selected interaction of Au nanoparticles. We envisage that such a facile solution-based strategy can be useful for synthesizing other single-crystalline kinked WZ-type transition-metal dichalcogenide NWs to develop novel functional materials with finely tuned properties.
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