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Exciton interactions in CdS nanocrystal aggregates in reverse micelle
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10.1063/1.1904563
/content/aip/journal/jcp/123/2/10.1063/1.1904563
http://aip.metastore.ingenta.com/content/aip/journal/jcp/123/2/10.1063/1.1904563
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Figures

Image of FIG. 1.
FIG. 1.

(a) HRTEM picture of individual CdS nanocrystal capped by oleic acid and (b) CdS aggregates capped by oleic acid, inset are the high-resolution phase of selected areas.

Image of FIG. 2.
FIG. 2.

(a) The nanocluster aggregation in reverse micelle (arrow indicate the axis of crystal lattice); (b) the macroscopic exciton after photoexcitation of QD aggregates if their lattice axis are parallel.

Image of FIG. 3.
FIG. 3.

(a) Exciton absorption of one CdS nanocrystal (4 nm) in reverse micelle. (b) Absorption spectrum of CdS nanocrystal aggregated solution.

Image of FIG. 4.
FIG. 4.

(a) The photoluminescence and excitation spectra of individual CdS nanocrystal organosol. (b) The photoluminescence spectra at 355 nm excitation and excitation spectrum of aggregated CdS nanocrystal organosol at 393 nm emission, and the green curves are the fitted curves for the emission spectrum.

Image of FIG. 5.
FIG. 5.

The excitation and emission spectra of CdS aggregates at excitation of 380 nm, fitting data, and the excitation spectra for 494 nm emission.

Image of FIG. 6.
FIG. 6.

The upconversion photoluminescence spectra of CdS aggregates film. The excitation wavelength is about 476 nm.

Image of FIG. 7.
FIG. 7.

(a) The excitation band structure-transition dipole array relation of bounded two nanocrystals; (b) the exciton absorption profiles of nanocrystal aggregates and individual nanocrystals.

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/content/aip/journal/jcp/123/2/10.1063/1.1904563
2005-07-18
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Exciton interactions in CdS nanocrystal aggregates in reverse micelle
http://aip.metastore.ingenta.com/content/aip/journal/jcp/123/2/10.1063/1.1904563
10.1063/1.1904563
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