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. 2019 Dec 21;14:388. doi: 10.1186/s11671-019-3220-7

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — a, d Schematic of the lattice where the mirror axis of nanocrescents is oriented towards the [0, − 1] and [2, 1] crystal axis, respectively (the blocks represent the crystal cell); b, c extinction spectrums recorded by employing an incident light with left and right circular polarization, respectively. The mirror axis of nanocrescents is directed towards the [0, − 1] direction of the crystal lattice; e, f extinction spectrums recorded by employing an incident light with left and right circular polarization, respectively. The mirror axis of nanocrescents is directed towards the [2, 1] direction of the crystal lattice