Anne Myers Kelley

Physical, Analytical, and Materials Chemistry:

Laser Raman Spectroscopies

Chemistry and Chemical Biology

amkelley@ucmerced.edu

209-228-4345

Our group's research focuses on using the inelastic laser light scattering technique known as resonance Raman spectroscopy to study the specific atomic-level motions that occur in a molecule or nanocrystal immediately after it absorbs light.  This information is particularly relevant to the mechanisms of photochemistry, vision, photography, xerography, and natural and artificial† photosynthesis (solar energy conversion).† Our work involves close coupling between experimental measurements and computational simulations of the quantum mechanical expressions for the Raman spectrum.† In addition to work on standard resonance Raman scattering, we have developed the two-photon analog, resonance hyper-Raman spectroscopy, as a tool to explore the structures and dynamics of two-photon allowed states of molecules and materials.  The large enhancement of the scattering intensities observed for molecules adsorbed to the surfaces of silver and gold nanoparticles (surface enhanced Raman and hyper-Raman scattering) has been explored both theoretically and experimentally and has been applied to help understand the efficiency enhancement of organic polymer-based solar photovoltaic devices by metallic nanostructures.† A currently active and exciting area of our groupís research is the use of resonance Raman spectroscopy to probe how the vibrations (phonons) of semiconductor nanocrystals couple to the electronic states of these materials.†

Current group members

® Professor Anne Myers Kelley

® Chen Lin (postdoc)