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Optical Properties of Fluorescent Mixtures: Comparing Quantum Dots to Organic Dyes

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Benjamin M. Hutchins , Thomas T. Morgan , Miné G. Ucak-Astarlioglu and Mary Elizabeth Williams

Department of Chemistry, The Pennsylvania State University, University Park, PA 16802

J. Chem. Educ., 2007, 84 (8), p 1301

DOI: 10.1021/ed084p1301

Publication Date (Web): August 1, 2007

Section:

History, Education, and Documentation

Abstract

Using eye catching demos and the size-dependent properties of quantum dots (QDs) we can appeal to a broad range of students, from high school and general chemistry students to those in more advanced chemistry and physics courses. This experiment is easily tailored to meet the requirements of the instructor and equipment availability. Visually observed fluorescent colors of QDs in conjunction with spectroscopic data show students the additive emission of QD mixtures. Although some mixtures appear to emit white light, their fluorescence peaks remain spectroscopically resolved; this is not possible using organic dyes. More advanced topics on inorganic synthesis and energy transfer can be discussed for students of higher levels.

Keywords (Audience):

First-Year Undergraduate / General

Keywords (Domain):

Analytical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Dyes / Pigments

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History

Received: August 03, 2009

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Article

Optical Properties of Fluorescent Mixtures: Comparing Quantum Dots to Organic Dyes

Abstract

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History

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Quantum Dots: An Experiment for Physical or Materials Chemistry

A Safer, Easier, Faster Synthesis for CdSe Quantum Dot Nanocrystals

Quantum Dots in a Polymer Composite: A Convenient Particle-in-a-Box Laboratory Experiment

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