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. 2021 Jan 8;12:180. doi: 10.1038/s41467-020-20445-0

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© The Author(s) 2021

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — a Demonstration of thermoelectric voltage generation by Bi₂Te₃ NPs at different heating temperatures. Corresponding actual temperature differences created across the device are represented by the temperature distribution images recorded by IR camera. b Variation of thermoelectric voltage with heating temperature ranging from 40 to 100 °C. c Slope of the linear fitting of ΔV vs. ΔT curve indicates the Seebeck coefficient.