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. 2020 Feb 17;7:5. doi: 10.1186/s40580-019-0216-z

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — Photothermal efficiency of each sample in four different conditions. Histogram (a) shows cell viability when using the samples immediately after fabrication. Histogram (b) cells cultured in PBS for 7 days. Cells were subjected to 808 nm wavelength NIR irradiation after being cultured in PBS, AuNP, AuNC, and AuNC@SiO₂. All measurements were done in triplicate