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Yingzhong Ma   
Yingzhong Ma
Staff Scientist

Ph.D., Physical Chemistry, Umeň University, Sweden

Research Interests:

Exciton dynamics in low-dimensional systems (carbon nanotubes, quantum dots and wires) and their functional assemblies,
Fundamental electronic excited-state processes in photovoltaic systems,

Excitation energy and electron transfer processes in natural and artificial photosynthetic complexes / assemblies,

Photo-induced proton transfer dynamics and hydrogen-bonding reactions

Nonlinear optics and ultrafast optical spectroscopy


Professional Societies:

American Chemical Society

American Physical Society
Optical Society of America

Selected Publications

  1. Ma, Y.-Z., Graham, M. W., Fleming, G. R., Green, A. A., and Hersam, M. C., "Ultrafast exciton dephasing in semiconducting single-walled carbon nanotubes", Phys. Rev. Lett. 101, 217402 (2008).

  2. Graham, M. W., Ma, Y.-Z., and Fleming, G. R., "Femtosecond photon echo spectroscopy ofsemiconducting single-walled carbon nanotubes", Nano Lett. 8, 3936-3941 (2008).

  3. Ma, Y.-Z., Graham, M. W., Prantil, M. A., Van Tassle, A. J., and Fleming, G. R., "Vibrational spectra and dynamics of electronically excited semiconducting single-walled carbon nanotubes", J. Phys. Chem. B 112, 16030-16034 (2008).
  4. Ma, Y.-Z., Hertel, T., Vardeny, Z. V., Fleming, G. R., and Valkunas, L., "Ultrafast spectroscopy of carbon nanotubes, In Carbon Nanotubes: Advanced Topics in the Synthesis, Structure, Properties and Applications" (A. Jorio, G. Dresselhaus and M. S. Dresselhaus, eds.), Springer, 111, 321-352 (2008).
  1. Valkunas, L., Ma, Y.-Z., and Fleming, G. R., "Exciton-exciton annihilation in single-walled carbon nanotubes", Phys. Rev. B 73, 115432 (2006).
  1. Ma, Y.-Z., Valkunas, L., Bachilo, S. M., and Fleming, G. R., “Temperature effects on femtosecond transient absorption kinetics of semiconducting single-walled carbon nanotubes”, Phys. Chem. Chem. Phys., 8, 5689-5693 (2006).
  1. Ma, Y.-Z., Spataru, C. D., Valkunas, L., Bachilo, S. M., Dexheimer, S. L., Louie, S. G., and Fleming, G. R., “Spectroscopy of zigzag single-walled carbon nanotubes: comparing femtosecond transient absorption spectra with ab initio calculations”, Phys. Rev. B 74, 085402 (2006).
  1. Ma, Y.-Z., Valkunas, L., Bachilo, S. M., and Fleming, G. R., “Exciton binding energy in semiconducting single-walled carbon nanotubes”, J. Phys. Chem. B 109, 15671-15674 (2005).
  1. Ma, Y.-Z., Valkunas, L., Dexheimer, S. L., Bachilo, S. M., and Fleming, G. R., "Femtosecond spectroscopy of optical excitations in single-walled carbon nanotubes: evidence for exciton-exciton annihilation", Phys. Rev. Lett.94, 157402 (2005).
  1. Ma, Y.-Z., Stenger, J., Zimmermann, J., Bachilo, S. M., Smalley, R. E., Weisman, R. B., and Fleming, G. R., "Ultrafast carrier dynamics in single-walled carbon nanotubes probed by femtosecond spectroscopy", J. Chem. Phys. 120, 3368-3373 (2004).
  1. Ma, Y.-Z., Holt, N. E., Li, X.-P., Niyogy, K. K., and Fleming, G. R., “Evidence for direct carotenoid involvement in the regulation of photosynthetic light harvesting”, Proc. Natl. Acad. Sci. USA,100, 4377-4382 (2003).

  2. Ma, Y.-Z., Cogdell, R. J., and Gillbro, T., “Energy transfer and exciton annihilation in the B800-850 antenna complex of the photosynthetic purple bacterium Rhodopseudomonas acidophila (Strain 10050): a femtosecond transient absorption study”, J. Phys. Chem. B, 101, 1087-1095 (1997).

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Provided by Oak Ridge National Laboratory's Chemical Sciences Division
Rev: March 2010