Shear ordering in polymer photonic crystals

被引：34

作者：

Snoswell, D. R. E. ^{[1
]}

Kontogeorgos, A. ^{[1
]}

Baumberg, J. J. ^{[1
]}

Lord, T. D. ^{[2
]}

Mackley, M. R. ^{[2
]}

Spahn, P. ^{[3
]}

Hellmann, G. P. ^{[3
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge CB3 0HE, England

[3] DKI, D-64289 Darmstadt, Germany

来源：

PHYSICAL REVIEW E | 2010年 / 81卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

COLLOIDAL CRYSTALS; CRYSTALLIZATION; SUSPENSIONS; RHEOLOGY; BEHAVIOR; SPHERES;

D O I：

10.1103/PhysRevE.81.020401

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Optical scattering spectra are recorded in situ on flowing colloidal polymeric nanocomposites which are sheared into photonic crystals at 150 degrees C using a high-pressure quartz-cell multipass rheometer. Broadband spectroscopy of the resonant Bragg scattering peak allows the direct observation of crystal formation and melting of monodisperse core-shell particles. A range of flow conditions of this solventless, highly viscous melt reveals four distinct regimes of crystal growth and decay which match a simple rheological model. Extraction of crystal thickness, order and lattice spacing are validated by one-dimensional electromagnetic simulations.

引用

页数：4

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