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. Author manuscript; available in PMC: 2017 Dec 7.
Published in final edited form as: Adv Funct Mater. 2016 Mar 31;26(22):3933–3941. doi: 10.1002/adfm.201505256

Figure 4.

Figure 4

Iron oxide magnetic nanoparticles coated with a thermoresponsive-fluorescent polymer consisting of a copolymer of benzofuranzan and N-isopropylacrylamide experience nanoscale heating upon application of an AMF (38.4 kA/m, 233 kHz). The fluorescence of the benzofuranzan dye increases with change in environment polarity, which changes with temperature due to the thermoresponsive properties of pNIPAM. With external heating the fluorescence is observed to increase at a temperature of ~40 °C, whereas upon application of an AMF the fluorescence is observed to increase even though the bulk temperature is 20 °C. Reproduced with permission.[31] Copyright 2013, Nature Publishing Group.