نتایج جستجو برای: colloidal particles

تعداد نتایج: 169710  

1996
G. A. Barrall K. Schmidt-Rohr Y. K. Lee K. Landfester H. Zimmermann G. C. Chingas

We present here an experimental and theoretical study of the application of two-dimensional exchange nuclear magnetic resonance spectroscopy ~NMR! to the investigation of the rotational diffusion of colloidal particles. The theoretical discussion includes the nature of the NMR frequency time-correlation function where the NMR interaction is represented by the chemical shift anisotropy ~CSA!. Ti...

Journal: :Soft matter 2014
Mitja Stimulak Miha Ravnik

Blue phase colloidal crystals and dielectric nanoparticle/polymer doped blue phases are demonstrated to combine multiple components with different symmetries in one photonic material, creating a photonic crystal with variable and micro-controllable photonic band structure. In this composite photonic material, one contribution to the band structure is determined by the 3D periodic birefringent o...

2013
Peter J. Lu David A. Weitz

Colloidal particles aremicroscopic solid particles suspended in a fluid. Colloids are small enough that thermal energy drives their dynamics and ensures equilibrationwith the suspending fluid; they are also large enough that their positions andmotions can bemeasured precisely using optical methods, such as light scattering and laser-scanning confocal fluorescence microscopy. Colloidal suspensio...

Journal: :The Journal of Chemical Physics 2010

2007
Eric R. WEEKS Carolyn R. NUGENT

We use three-dimensional confocal microscopy to study the structure of a dense colloidal liquid confined between two parallel glass plates. The colloidal sample is at a volume fraction of 50% and is a binary mixture of 2 μm and 3 μm diameter particles to prevent crystallization. The plate separation ranges from 50 small particle diameters to 3 small particle diameters. While particles form laye...

Journal: :Proceedings of the National Academy of Sciences 1960

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