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. 2016 Feb 11;6:20921. doi: 10.1038/srep20921

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(a) Linear swelling ratio λ_f for PNIPAm/GO and PNIPAm/rGO(N) exposed to blue light at 41.8 mW/cm² for 3 min. (b) Linear swelling ratio λ_f for PNIPAm/rGO(96 h). Each cycle consists of blue light illumination for 3 min followed by a recovery time of 15 min. (c) Temperature changes for 2.5 mg/mL aqueous GO and rGO of various reduction times under blue-light irradiation.