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Thermoresponsive, and reversibly emissive, core–shell nanogel composed of PNIPAM and carbon nanodots

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Abstract

We prepared a core–shell structured nanogel composed of carbon nanodots (C-dots), fluorescein, and poly(N-isopropylacrylamide) (PNIPAM) via emulsion copolymerization. The hybrid nanogel material was responsive to temperature as an emissive hybrid material and showed reversible and ratiometric changes in fluorescence emission according to temperature cycles at 25 and 45 °C, resulting from the shrinking of the PNIPAM copolymer chains with temperature variation. Dynamic light scattering, transmission electron microscopy were used to characterize the morphology and size of the particles. The hybrid nanogel was sensitive enough to temperature to be promising in biological application, such as temperature-sensitive drug delivery system and bioimaging.

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Acknowledgments

Financial support from the National Research Foundation of Korea (NRF) funded by Korean government through the Nuclear R&D Project (2015M2A7A1000217) is gratefully acknowledged.

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Authors and Affiliations

  1. Organic and Optoelectronic Materials Laboratory, Department of Organic Materials Engineering, Chungnam National University, Daejeon, 34134, Korea

    Yujun Kim & Taek Seung Lee

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  1. Yujun Kim
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  2. Taek Seung Lee
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Correspondence to Taek Seung Lee.

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Kim, Y., Lee, T.S. Thermoresponsive, and reversibly emissive, core–shell nanogel composed of PNIPAM and carbon nanodots. Polym. Bull. 73, 2615–2625 (2016). https://doi.org/10.1007/s00289-016-1702-7

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  • DOI: https://doi.org/10.1007/s00289-016-1702-7

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