Diffusion Coefficients of CdSe/CdS Quantum Rods in Water Measured Using Polarized Fluorescence Correlation Spectroscopy

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A polarization fluorescence correlation spectroscopy system based on a confocal microscope was built to study the rotational and translational diffusion of CdSe/CdS quantum rods (Q-rods), with the same and different polarization states between the polarizer and the analyzer (i.e. the XXX and XYY states). The rotational diffusion amplitude showed the dependences on polarization of 0.75 +/- 0.05 in the XXX state and 0.26 +/- 0.03 in the XYY state, when the translational diffusion amplitude was 1. The diffusion coefficients of the Q-rods were found based on their translational and rotational diffusion times in the two polarization states, in solutions with viscosity ranging from 0.9 to 6.9 cP. The translational and rotational diffusion coefficients ranged from 1.5x10(-11) to 2.6x10(-12) m(2) s(-1) and from 2.9x10(5) to 5.6x10(4) s(-1), respectively.
Publisher
OPTICAL SOC KOREA
Issue Date
2014-10
Language
English
Article Type
Article
Keywords

TRANSLATIONAL DIFFUSION; FLUCTUATIONS; NANORODS; MOBILITY; DOTS

Citation

JOURNAL OF THE OPTICAL SOCIETY OF KOREA, v.18, no.5, pp.598 - 604

ISSN
1226-4776
DOI
10.3807/JOSK.2014.18.5.598
URI
http://hdl.handle.net/10203/194745
Appears in Collection
PH-Journal Papers(저널논문)
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