Rodlike behavior of polyelectrolyte brushes

被引:63
作者
Guenoun, P [1 ]
Muller, F
Delsanti, M
Auvray, L
Chen, YJ
Mays, JW
Tirrell, M
机构
[1] CEA Saclay, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France
[2] CEA Saclay, Serv Chim Mol, F-91191 Gif Sur Yvette, France
[3] CEA Saclay, Leon Brillouin Lab, F-91191 Gif Sur Yvette, France
[4] Univ Alabama, Dept Chem, Birmingham, AL 35294 USA
[5] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA
[6] Univ Rochelle, F-17000 La Rochelle 9, France
关键词
D O I
10.1103/PhysRevLett.81.3872
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Spherical charged brushes are studied in the form of block copolymer micelles. These copolymers are diblocks made of one deuterated, highly charged block and of one protonated, hydrophobic block. Neutron scattering with contrast matching enables us to probe selectively the structure of the arms of the charged corona of the micelles. A near-perfect rodlike behavior (scattered intensity similar to q(-1)) of the arms is observed at all salt concentrations above an onset in wave vector q(0) which increases with salt concentration above a threshold. Results are strikingly different from what is observed for linear polyelectrolytes, since charged brushes appear very weakly sensitive to the addition of salt. [S0031-9007(48)07484-5].
引用
收藏
页码:3872 / 3875
页数:4
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