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Dynamic light scattering microscope: Accessing opaque samples with high spatial resolution
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DOI：10.1364/OE.21.020260.png)
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Abstract
En 中文
We developed a new technique that conducts dynamic light scattering (DLS) under a microscope with high spatial resolution. This technique dramatically extends the range of DLS application from transparent to opaque samples. The total scattered electric field contains both electric field generated from the samples and time-independent reflected electric field. These two components are decomposed by applying a partial heterodyne method. By using this technique, we successfully calculate the characteristic size distribution of both multiple-scattering samples and strong light-absorbing samples. This is the first study to observe the collective motion of particles in a highly concentrated solution by using DLS. (C) 2013 Optical Society of America
Keywords:
DIFFUSING-WAVE SPECTROSCOPY
MEDIA
GELS
NANOPARTICLES
FLUCTUATIONS
SUPPRESSION
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