Colloidal crystals made of poly(N-isopropylacrylamide) microgel particles

被引：185

作者：

Hellweg, T ^{[1
]}

Dewhurst, CD

Brückner, E

Kratz, K

Eimer, W

机构：

[1] TU Chemnitz, Inst Phys Mat Forsch & Flussigkeiten, D-09107 Chemnitz, Germany

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[3] Univ Essen Gesamthsch, Inst Umweltanalyt, D-45141 Essen, Germany

[4] Univ Bielefeld, Fak Chem, D-33615 Bielefeld, Germany

来源：

COLLOID AND POLYMER SCIENCE | 2000年 / 278卷 / 10期

关键词：

colloids; microgel; face-centred-cubic lattice; small-angle neutron scattering; light scattering;

D O I：

10.1007/s003960000350

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Poly (N-isopropylacrylamide) microgel particles are found to form colloidal crystals similar to those occurring in typical hard-sphere colloids like poly(methylmethacrylate) beads. Samples made of particles with different crosslinker concentrations are investigated and their deswelling ratio is determined using dynamic light scattering. Small-angle neutron scattering data are also presented and analysed in terms of a face-centred-cubic crystal structure. The characteristic length, a, of the elementary cell is found to be 535 +/- 16 and 495 +/- 15 nm for the two systems investigated. This leads to particle radii of 189 +/- 6 and 175 +/- 5 nm, respectively. These values compare well to the radii determined using several different methods.

引用

页码：972 / 978

页数：7

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