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. 2017 May 30;11:47. doi: 10.1186/s13065-017-0275-3

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© The Author(s) 2017

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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Schematic representation of host–guest interactions between nanomaterials as carrier serving as host and other molecules as guests (a). Theranostics delivery agent can be obtained by simultaneously loading both the therapeutic and diagnostic agents on the same nanomaterial. On the other hand, multimodal theranostics delivery agent is obtained if all the three agents or more are loaded on a nanomaterial, simultaneously (b)