Journal
NATURE NANOTECHNOLOGY
Volume 15, Issue 3, Pages 192-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41565-019-0606-8
Keywords
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Funding
- National Natural Science Foundation of China [51732011, 21431006, 21761132008, 81788101, 11227901, 21805188]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521001]
- Key Research Programme of Frontier Sciences, CAS [QYZDJ-SSW-SLH036]
- National Basic Research Programme of China [2014CB931800]
- Users with Excellence and Scientific Research Grant of Hefei Science Centre of CAS [2015HSC-UE007]
- Anhui Initiative in Quantum Information Technologies [AHY050000]
- Ontario Research Fund-Research Excellence Program
- Natural Sciences and Engineering Research Council of Canada
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A double-buffer-layer engineering strategy enables the selective growth of magnetic materials at specific locations on a wide variety of semiconducting nanorods. Chirality-the property of an object wherein it is distinguishable from its mirror image-is of widespread interest in chemistry and biology(1-6). Regioselective magnetization of one-dimensional semiconductors enables anisotropic magnetism at room temperature, as well as the manipulation of spin polarization-the properties essential for spintronics and quantum computing technology(7). To enable oriented magneto-optical functionalities, the growth of magnetic units has to be achieved at targeted locations on a parent nanorod. However, this challenge is yet to be addressed in the case of materials with a large lattice mismatch. Here, we report the regioselective magnetization of nanorods independent of lattice mismatch via buffer intermediate catalytic layers that modify interfacial energetics and promote regioselective growth of otherwise incompatible materials. Using this strategy, we combine materials with distinct lattices, chemical compositions and magnetic properties, that is, a magnetic component (Fe3O4) and a series of semiconducting nanorods absorbing across the ultraviolet and visible spectrum at specific locations. The resulting heteronanorods exhibit optical activity as induced by the location-specific magnetic field. The regioselective magnetization strategy presented here enables a path to designing optically active nanomaterials for chirality and spintronics.
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