Measuring quantum dot size via pulsed field gradient NMR

Quantum dots (QDs) are zero-dimensional semiconductors used in photovoltaics, displays, and medical treatment and imaging. Pulsed field gradient nuclear magnetic resonance (PFG-NMR) is a powerful technique closely related to magnetic resonance imaging (MRI) for measuring diffusion coefficients in solution.  The diffusion coefficients of QDs in colloidal suspension are used to calculate hydrodynamic radii which are compared to QD core radii obtained from optical absorbance sizing curves and light scattering experiments, providing insight into the structure of quantum dots and the nature of the information provided by pulsed field gradient NMR.  This project involves quantum dot synthesis and measurement of quantum dot sizes via PFG NMR, optical absorbance, and light scattering.

Name of research group, project, or lab
Van Ryswyk lab
Representative publication
Logistics Information:
Project categories
Materials Science
Student ranks applicable
Time commitment
Summer - Full Time
Paid Research
Number of openings
Techniques learned

Quantum dot synthesis using inert atmosphere vacuum line techniques; nuclear magnetic resonance spectroscopy; elastic light scattering; uv-visible-near IR spectroscopy

Contact Information:
Mentor name
Hal Van Ryswyk
Mentor email
Mentor position
principal investigator
Name of project director or principal investigator
Hal Van Ryswyk
Email address of project director or principal investigator
1 sp. | 5 appl.
Hours per week
Summer - Full Time
Project categories
Materials Science (+1)
ChemistryMaterials Science