Infrared Laser-Induced Photo-Thermal Phase Transition of an Aqueous Poly(N-isopropylacrylamide) Solution in the Micrometer Dimension.
Infrared Laser-Induced Photo-Thermal Phase Transition of an Aqueous Poly(N-isopropylacrylamide) Solution in the Micrometer Dimension.
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红外激光诱导微米级聚（N-异丙基丙烯酰胺）水溶液的光热相变。
DOI：
10.1246/bcsj.69.59
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发表时间：
1996
影响因子：
4
通讯作者：
H. Masuhara
中科院分区：
文献类型：
--
作者：
M. Ishikawa;H. Misawa;N. Kitamura;R. Fujisawa;H. Masuhara
聚（N-异丙基丙烯酰胺）水溶液（PNIPAM，wt% = 1.8-3.6%）的相变是通过聚焦（约 1 μm）1064 nm 激光束的照射引起的；这导致了单个 PNIPAM 微粒的形成。通过激光功率、聚合物浓度和溶液温度将颗粒直径控制在2-9μm。颗粒形成的主要来源是通过激光束对水（H2O）进行局部加热而产生的聚合物溶液的光热相变。讨论了该现象的特征，包括入射激光束对 PNIPAM 颗粒的操纵以及辐射力对颗粒形成的作用。
The phase transition of an aqueous poly(N-isopropylacrylamide) solution (PNIPAM, wt% = 1.8—3.6%) was induced by the irradiation of a focused (ca. 1 μm) 1064-nm laser beam; this brought about the formation of a single PNIPAM microparticle. The diameter of the particle was controlled to 2—9 μm through the laser power, polymer concentration, and solution temperature. The primary origin of particle formation was the photo-thermal phase transition of the polymer solution through the local heating of water (H2O) by the laser beam. The characteristic features of the phenomena, including manipulation of the PNIPAM particle by the incident laser beam and the role of radiation force for the particle formation, are discussed.