Determining the Rate of Ligand-Induced Charge-Transfer Effects on Quantum Dots

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Bowman, C. (2015). Determining the Rate of Ligand-Induced Charge-Transfer Effects on Quantum Dots. Unc Charlotte Electronic Theses And Dissertations.
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Abstract

In this report, charge carrier dynamics and rate of electron transfer is investigated between two bis(thioether)silane (R2BtsMe) ligands and 2.65 nm CdSe core quantum dots (QDs). Isothermal titration calorimetry (ITC) data is used to determine binding constant and percentage of occupied sites for these systems. The data is then used in conjunction with steady-state photoluminescence (SSPL) and time-resolved photoluminescence (TRPL) data in order to determine charge transfer rates as a function of bound ligand and intrinsic charge transfer rates that are dependent upon the species of ligand bound to QD surface. Interesting results were found through this analysis, and further testing using other ligands and CdSe QDs of different sizes may provide a more complete picture of this type of analysis with ligand-QD systems. Further experimental techniques are also postulated.

Details
Author

Bowman, Cale

Title

Determining the Rate of Ligand-Induced Charge-Transfer Effects on Quantum Dots

Physical Description

1 online resource (75 pages) : PDF

Date

2015

Degree Granting Institution

University of North Carolina at Charlotte

Abstract

In this report, charge carrier dynamics and rate of electron transfer is investigated between two bis(thioether)silane (R2BtsMe) ligands and 2.65 nm CdSe core quantum dots (QDs). Isothermal titration calorimetry (ITC) data is used to determine binding constant and percentage of occupied sites for these systems. The data is then used in conjunction with steady-state photoluminescence (SSPL) and time-resolved photoluminescence (TRPL) data in order to determine charge transfer rates as a function of bound ligand and intrinsic charge transfer rates that are dependent upon the species of ligand bound to QD surface. Interesting results were found through this analysis, and further testing using other ligands and CdSe QDs of different sizes may provide a more complete picture of this type of analysis with ligand-QD systems. Further experimental techniques are also postulated.

Genre

masters theses

Subjects--Topics

Chemistry

Degree

M.S.

Keywords

Charge
Dots
Fluorescence
Photoluminescence
Quantum

Subject Area

Chemistry

Advisor(s)

Jones, Marcus

Committee Members

Rabinovich, Dan
Zhang, Haitao
Schmedake, Thomas

Degree Note

Thesis (M.S.)--University of North Carolina at Charlotte, 2015.

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Rights Holder Information

Copyright is held by the author unless otherwise indicated.

Identifier

Bowman_uncc_0694N_11014

Permalink

http://hdl.handle.net/20.500.13093/etd:502