Laser induced phase transition in aqueous solutions of hydrophobically modified poly(N-isopropylacrylamide).

被引：19
|
作者：
Hofkens, J [1 ]
Hotta, JI [1 ]
Sasaki, K [1 ]
Masuhara, H [1 ]
Faes, H [1 ]
DeSchryver, F [1 ]
机构：
[1] KATHOLIEKE UNIV LEUVEN, DEPT ORGAN CHEM, LOUVAIN, BELGIUM
来源：
MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1996年 / 283卷
关键词：
D O I：
10.1080/10587259608037881
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Phase transitions of amphiphilic copolymer solutions can be achieved by irradiating aqueous solutions of this polymer with an IR-laser beam. As a result, a single microparticle up to 15 mu m is formed, whereas thermal heating of the solution results in submicrometer particles. Both the photo-thermal effect (due to absorption of 1064 nm by the H2O overtone) and the radiation force cause the unusual large particle formation (up to 15 Gem). Furthermore, the present study shows that the conformational distribution and associations of polymers in solution can be controlled with the radiation force of a focused laser beam.
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页码：165 / +
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