Colloidal gels have unique properties due to a complex microstructure which forms into an extended network. Although the bulk properties of colloidal gels have been studied, there has been difficulty correlating those properties with individual colloidal dynamics on the microscale due to the very high viscosity and elasticity of the material. We utilize rotational X-ray tracking (RXT) to invest...

It is very important in the design of a drying system is to evaluate sticking behaviour of the materials goes under drying. A new approach to the sticking issue is applied in this study by carrying out a sticking test for the liquid associated with the materials under study. It was found that the liquid bridge is responsible of the initial sticking of the materials to the contact surface and th...

We developed a simple method to fabricate colloidal crystal heterostructures (CCHs) with two or three stacked poly(methyl methacrylate) (PMMA) particle two-dimensional (2D) colloidal monolayer arrays of different particle spacings that independently diffract light. The 2D colloidal monolayer arrays of PMMA were prepared by using the air/water interface self-assembly method we recently developed...

A new microfluidic approach to preparing anisotropic colloidal photonic crystal microparticles is developed and the self-assembly kinetics of colloidal nanoparticles is discussed. Based on the “coffee ring” effect in the self-assembly process of colloidal silica particle in strong solvent extraction environment, we successfully prepared anisotropic photonic crystal microparticles with different...

The assembly of metal nanoparticles into supracolloidal structures unlocks optical features, which can go beyond synergistic combinations the properties their primary building units. This is due to inter-particle plasmonic coupling effects, give rise emergent properties. motivation for this progress report twofold: First, it described how simulation approaches be used predict and understand clu...

Colloids are important for our daily life and modern technologies. Among which the colloidal particles with anisotropic properties in geometry, surface functionality, and chemical composition emerge as an important family of the colloidal genome. Scientifically, the inand out-of-equilibrium behavior of anisotropic colloids are fundamentally different from conventional particles because of their...

OF DOCTORAL DISSERTATION HELSINKI UNIVERSITY OF TECHNOLOGY P. O. BOX 1000, FI-02015 TKK http://www.tkk.fi Author Lei Dong Name of the dissertation Manuscript submitted 14.10.2008 Manuscript revised 12.12.2008 Date of the defence 19.01.2009 at 13 o’clock, TKK main building, Otakaari 1, lecture hall E Article dissertation (summary + original articles) Monograph Faculty Department Field of researc...