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​Lets congratulate Ryan Hefti for his recent publication, "Long-Range Correlated Fluorescence Blinking in CdSe/ZnS Quantum Dots" in J . Phys. Chem. C (online pre print, DOI: 10.1021/jp3084343). Ryan is advised by Dr. Pat Moyer (Physics and Optical Science) and this work was in collaboration with Dr. Marcus Jones (chemistry).


University of South Carolina, Department of Chemistry and Biochemistry

“INTERFACIAL CHEMISTRY OF SEMICONDUCTOR NANOCRYSTALS”

Andrew Greytak​Colloidal semiconductor nanocrystals – a type of quantum dot (QD) – are well-known as bright, highly photostable inorganic fluorophores that can be well-suited to imaging applications in biology. Additionally, the delocalized electronic states present in nanoscale semiconductors should offer distinctive ways to interact with and report on the biological environment. Such applications require good control of the interfacial chemistry of inorganic nanoparticles: in particular, to guide the formation of core/shell heterostructures to optimize brightness, and to introduce a surface coating that can enable the particles to function properly in the biological environment while limiting hydrodynamic size and avoiding quenching of the QD excited state. Significant progress has been made in identifying specific examples that comprise these features, especially for the case of metal chalcogenide semiconductors, but there remains only a limited understanding of the reaction mechanisms and thermodynamics associated with the elaboration of the surfaces of such particles with inorganic and organic layers. I will describe...

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Sharonda LeBlanc​Sharonda recently defended her Ph.D. dissertation, entitiled: "Electric field dependent spectroscopy of single nanocrystal systems" in front of a packed audience. She completed the work under the supervision of Dr. Patrick Moyer (Physics and Optical Science) and Dr. Marcus Jones (Chemistry) and will soon be starting a postdoctoral position with Dr. Gloria Elliot (Mechanical Engineering and Engineering Science) at UNC Charlotte.


Nanoscale Science - Faculty in Focus

Welcome to the Walter Research Group in the Chemistry Department at UNC Charlotte. We are interested in the synthesis and development of new materials for Solar Energy Conversion. Photoactive materials such as porphyrins are developed in our lab can be used to harvest solar photons and convert that energy into either electricity or into a fuel such as hydrogen. Our work involves testing these materials in organic solar cell, dye-sensitized TiO2 solar cell, or photoelectrochemical cell configurations. Our work spans materials research, organic syntheses, and nanoscience.