What question did this study set out to answer?

To re-evaluate and establish self-consistent, size-dependent optical absorption coefficients for cadmium selenide nanocrystals across both band-edge and high-energy absorption regions.

October 15, 2009The Journal of Physical Chemistry COpen Access

Re-examination of the Size-Dependent Absorption Properties of CdSe Quantum Dots

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Authors

JJJacek J. JasieniakAustralian Regenerative Medicine Institute LSLisa SmithDouglas College JEJoel van EmbdenMIT University

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Implication

Spectroscopic characterization reveals size-dependent absorption coefficients in cadmium selenide quantum dots, highlighting reliable calibration standards for tracking nanocrystal growth.

Key Points

To re-evaluate and establish self-consistent, size-dependent optical absorption coefficients for cadmium selenide nanocrystals across both band-edge and high-energy absorption regions.
Combined transmission electron microscopy (TEM) with inductively coupled plasma–optical emission spectroscopy (ICP-OES) to correlate nanocrystal dimensions with precise molar concentrations.
Benchmarked experimental absorption profiles against a zero-dimensional confinement model, classical dielectric light absorption theory, and atomistic semiempirical pseudopotential calculations.
Established self-consistent band-edge calibration curves linking nanocrystal diameter directly to optical absorption coefficients across both low- and high-energy spectral regimes.
Demonstrated the accuracy of the updated calibration standards by quantitatively tracking the nucleation and growth kinetics of cadmium selenide nanocrystals synthesized in solution.

Cite This Study

Jasieniak et al. (2009) studied this question.

synapsesocial.com/papers/6a7581bbdcfefe9676dd787e https://doi.org/10.1021/jp906827m

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Implication

Spectroscopic characterization reveals size-dependent absorption coefficients in cadmium selenide quantum dots, highlighting reliable calibration standards for tracking nanocrystal growth.

Re-examination of the Size-Dependent Absorption Properties of CdSe Quantum Dots

Discussion

Member takes

Implication

Key Points

Cite This Study

Re-examination of the Size-Dependent Absorption Properties of CdSe Quantum Dots

Discussion

Member takes

Implication

Key Points

Cite This Study

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