Effect of vortex-induced physical stress on fluorescent properties of dye-containing poly(ethylene glycol)-block-poly(lactic acid) micelles |
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| Authors: | Tyler L Odom Jacob R Blankenship Giselle Campos Devin C Mart Wenyan Liu Risheng Wang Keiichi Yoshimatsu |
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| Affiliation: | 1. Department of Chemistry, Missouri State University, Springfield, Missouri, USA;2. Center for Research in Energy and Environment, Missouri University of Science and Technology, Rolla, Missouri, USA;3. Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri, USA |
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| Abstract: | The effect of vortex-induced mechanical stresses on the fluorescent properties of dye-containing poly(ethylene glycol)-block-poly(lactic acid) (PEG-b-PLA) block copolymer micelles has been investigated. PEG-b-PLA block copolymer micelles containing fluorescent dyes, 3,3′-dioctadecyloxacarbocyanine perchlorate (DiO) and/or 1,1′-dioctadecyl-3,3,3′,3′-tetramethylindocarbocyanine perchlorate (DiI), are prepared by a simple one-step procedure that involves the self-assembly of block copolymers and spontaneous incorporation of hydrophobic dyes into the core of the micelles. Upon vortexing, the micelle dispersion samples showed a decrease in fluorescence intensity in a rotational speed- and time-dependent manner. The results demonstrated that the vortexing can alter the fluorescent properties of the dye-containing PEG-b-PLA block copolymer micelle dispersion samples, suggesting the potential utility of block copolymer micelles as a mechanical stress-responsive nanomaterial. |
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| Keywords: | micelles self-assembly stimuli-sensitive polymers |
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