My current research focuses on the physics and chemistry under high pressure by employing various spectroscopic techniques combined with the diamond anvil cell. Current projects include surface-enhanced Raman scattering (SERS) to understand surface-adsorbate and particle-particle interactions as well as optical studies of semiconductor nanoparticle systems.
Past research used solvatochromic dye probes to study microviscosity (fluorescence anisotropy) and solvation dynamics (time dependent fluorescence Stokes shift) of nonionic aqueous polymer solutions on the femtosecond (fluorescence upconversion) to nanosecond (time correlated single photon counting) time scales. Also used femtosecond pump-probe transient absorption spectroscopy to study electronic relaxation in Au metal nanoparticle aggregates, subnanometer Au nanoclusters, and semiconductor nanoparticles.
Schwartzberg, A. M., C. D. Grant, T. van Buuren, and J. Z.
Zhang, "The Reduction of HAuCl4 by Na2S Revisited: Structure and Optical Properties
of the Nanomaterial Product," submitted to
Shaw, G. B., C. D. Grant, H. Shirota, E. W. Castner, Jr.,
and L. X. Chen, "Ultrafast Structural Rearrangements in the MLCT Excited State
for Copper(I) bis-Phenanthrolines in Solution," submitted to
Grant, C. D., K. Steege, M. R. DeRitter,
and E. W. Castner, Jr., "Microviscosity in Multiple Regions of Complex
Aqueous Solutions of Poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene
Grant, C. D., K. Steege, T. Fadeeva, M.
R. DeRitter, and E. W. Castner, Jr., "Fluorescence Probing of Interior,
Interfacial, and Exterior Regions in solutions of PEO-PPO-PEO Triblock Copolymers,"
Zhang, J. Z., A. M. Schwartzberg, T. J. Norman, Jr., C. D. Grant,
J. Liu, F. Bridges, and T. Van Buuren, "Comment on 'Gold Nanoshells Improve
Single Nanoparticle Molecular Sensors.'"