Anne Myers KelleyProfessor
Professor Kelley's research focuses on using the laser light scattering techniques of resonance Raman and hyper-Raman spectroscopy to study the atomic-level details of how materials interact with light. These studies reveal the detailed mechanisms of fast photochemical reactions such as those involved in human vision, photography, xerography, and solar energy conversion. Her group carries out experiments and also develops theoretical and computational tools for analyzing the data.
She also has an interest in materials with strong nonlinear optical responses, which can be used to convert electrical signals to optical signals in fiber-optic communications and in advanced optical microscopy methods. Her group uses Raman and other spectroscopic methods to understand and predict the nonlinear optical properties of molecules and the manner in which those properties are modified by the intermolecular interactions present in useful materials.
Professor Kelley's group is also working to better understand and exploit the enhancement of scattering intensities observed for molecules adsorbed to the surfaces of metal nanoparticles (surface enhanced Raman and hyper-Raman scattering). These techniques provide amplification of the normally weak signals needed for sensitive analytical and bioanalytical applications.
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David F. KelleyProfessor
Professor Kelley's research group uses ultrafast optical spectroscopy to examine the optical and electronic properties of semiconductor nanoparticles. He focuses on layered semiconductors - specifically gallium selenide and indium selenide - which have layered crystal structures and form two-dimensional, disk-like nanoparticles. The optical properties of indium selenide are very well suited for the absorption of sunlight; therefore, its nanoparticles hold considerable promise as the active media in photovoltaics.
Professor Kelley's group synthesizes nanoparticles that have diameters from 2 nm to tens of nanometers - all of which are four atoms thick - as the properties of such nanoparticles are strongly size dependent, due to quantum size effects. He is primarily interested controlling and optimizing the properties of the nanoparticles for solar energy conversion.
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Aleksandr NoyAssociate Adjunct Professor
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Tao YeAssociate Professor
Professor Ye's research is focused on developing the nanoscale surface chemistry needed to manipulate and measure biomolecules and analogous systems. The nanoscale arrangements of biomolecules, such as proteins and DNA, underlie a wide spectrum of biological functions. Yet our ability to measure and control biomolecules at the nanoscale and single molecule level remains very limited. His group is using and developing sophisticated nanoscience tools to position and measure single molecules with nanometer resolution, dynamically activate the functions of individual biomolecules on surfaces, and develop artificial analogs of biological motors. The greatly improved understanding and control of biomolecules at the nanoscale have implications in unraveling key biological functions, creating artificial functional bimolecular structures, and developing ultra-sensitive biosensors.
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Liang ShiAssistant Professor
Developing and applying multi-scale modeling methods to understand the structure, dynamics and spectroscopy of complex condensed-phase molecular systems, such as
- novel optoelectronic materials (e.g., organic semiconductors and quantum dots)
- supercritical aqueous solutions
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