Multi-color fluorescence of pNIPAM-Based nanogels modulated by dual stimuli-responsive FRET processes
- Authors
- Lee, Seung Hwan; Bui, Hoa Thi; Vales, Temmy Pegarro; Cho, Sung; Kim, Ho-Joong
- Issue Date
- Jun-2017
- Publisher
- ELSEVIER SCI LTD
- Citation
- DYES AND PIGMENTS, v.145, pp 216 - 221
- Pages
- 6
- Journal Title
- DYES AND PIGMENTS
- Volume
- 145
- Start Page
- 216
- End Page
- 221
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/63989
- DOI
- 10.1016/j.dyepig.2017.06.006
- ISSN
- 0143-7208
1873-3743
- Abstract
- We report the modulation of the dual photo/thermo-responsive multicolor fluorescence from poly(Nisopropyl acrylate) pNIPAM-based nanogels. The thermo-responsive pNIPAM-crosslinked matrix was covalently copolymerized with nitrobenzoxadiazole (NBD) monomers as a Forster resonance energy transfer (FRET) donor and electrostatically conjugated with photochromic spiropyran (SP) dyes as a FRET acceptor. The pristine nanogel emits green fluorescence derived from the NBD moieties; however, the irradiation of the nanogels with UV light led to the transformation of the ring-closed colorless SP moieties to the ring-opened coral-red merocyanine (MC) moieties, resulting in light-pink fluorescent nanogels. Notably, at higher temperatures, the fluorescence of the nanogels was red-shifted and enhanced by the more efficient FRET process. The nanogels were well-distributed in the cellular cytoplasm and showed excellent photochromic function in the subcellular environment for applications asphoto-switchable bio-imaging agents and nanothermometers. (C) 2017 Elsevier Ltd. All rights reserved.
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Collections - College of Natural Sciences > Department of Life Science > 1. Journal Articles
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