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. 2015 Sep 16;10:359. doi: 10.1186/s11671-015-1060-7

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© Zhang et al. 2015

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 — Time response of graphene conductance to water vapor. The time response of graphene gas sensor to water vapor (the relative humidity was 85 %) given in dimensionless units of 100 × ∆σ/σ₀ where σ₀ stands for the conductance of the graphene sensor and ∆σ is the change in conductance due to H₂O flow