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24 April 2018 Raman microspectroscopic study on an optically formed poly(N-isopropylacrylamide) rich microparticle: molecular weight dependence of a polymer concentration in the particle
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Proceedings Volume 10712, Optical Manipulation Conference; 107121X (2018) https://doi.org/10.1117/12.2319560
Event: SPIE Structured Light, 2018, Yokohama, Japan
Abstract
Poly(N-isopropylacrylamide) solution, which is a representative thermoresponsive polymer, exhibits a phase separation with a formation of polymer-rich microparticles due to dehydration and aggregation of the polymer chains above a lower critical solution temperature (LCST). However, little is known about the details of polymer concentration in the particle. We have developed optical tweezers combined with confocal Raman microspectroscopy to analyze a hydration structure in a single polymer rich particle. A focused near-infrared laser beam produced the microparticle at the focal point due to an optical force and a photothermal effect. In this study, we investigated that molecular weight dependence of the polymer concentration in the polymer-rich particle by means of Raman microspectroscopy.
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Kayo Fujiwara, Tatsuya Shoji, Mitsuhiro Matsumoto, Taka-Aki Asoh, Takashi Nishiyama, Hideo Horibe, and Yasuyuki Tsuboi "Raman microspectroscopic study on an optically formed poly(N-isopropylacrylamide) rich microparticle: molecular weight dependence of a polymer concentration in the particle ", Proc. SPIE 10712, Optical Manipulation Conference, 107121X (24 April 2018); https://doi.org/10.1117/12.2319560
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