ChIN简介页:美国乔治亚理工学院化学与生物化学系:Mostafa A. El-Sayed教授的研究小组 (激光动力学)
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美国乔治亚理工学院化学与生物化学系:Mostafa A. El-Sayed教授的研究小组 (激光动力学)

【URL】 http://www.chemistry.gatech.edu/faculty/elsayed/m_elsayed.html

【知名人物/学术带头人】
     Professor Mostafa A. El-Sayed

Julius Brown Chair and Regent Professor;
Director, Laser Dynamics Laboratory
and Editor-in-Chief, The Journal of Physical Chemistry

【简介】
     Mostafa A. El-Sayed

Office: 104-B (LDL)
School of Chemistry and Biochemistry
Georgia Institute of Technology
Atlanta, GA 30332-0400
Phone: 404-894-0292
Fax: 404-894-7452
E-mail: mostafa.el-sayed@chemistry.gatech.edu

B.Sc., Ain Shams U. Cairo, Egypt;
Ph.D. Florida State University

The ACS Langmuir National Award in Chemical Physics - 2001; the ACS Local Section Awards: the Northeast Richards Medal; the ACS Florida Section Award, the ACS California Section Award; the Southern California Section (Tolman) Award and the Eastern Tennessee Linde Award. The 1990 King Faisal International Prize in Sciences. Dr. El-Sayed is an elected member of the US National Academy of Sciences; an elected Fellow of the American Academy of Arts and Science, the AAAS , and the American Physical Society. He is an Associate member of the Third World Academy of Sciences.

Professor El-Sayed's research group is housed in the Laser Dynamics Laboratory (LDL). LDL houses the most recent lasers and laser spectroscopic equipment for time resolved studies in the femto-to-millisecond time scale.

Properties of Material Confined in Time and Nanometer Space of Different Shapes: The type of electronic motion in matter determines its property and applications. This motion is determined by the forces acting on the electrons which determines the space in which they are allowed to move. One expects that if they reduce the size of material to below its naturally allowed characteristic length scale, new properties should be observed which are different from that of the macroscopic material as well as of their building blocks (atoms or molecules). This occurs on the nanometer length scale. Studies include: (a)ultrafast electron-hole dynamics in semiconductor nanoparticles, (b) shape control synthesis and stability of metallic nanoparticles, and (c) dependence of catalytic efficiency on metallic nanoparticle shapes, and (d) the optical, relaxation and photothermal properties of gold nanospheres and nanorods. An active program has been initiated which is aimed at the study of the shape de pendence of catalysis by transition metal nanoparticles of reactions of industrial or environmental importance.

Molecular Mechanism(s) of Solar-to-Electric Energy Conservation by the Other Photosynthetic System in Nature: Upon light absorption, the all-trans retinal of bacteriorhodopsin (bR), a natural photosynthetic system photoisomerizes rapidly, thus separating charges within the protein and leading to the pumping of protons from the cell interior to its membrane surface. The latter process is found to require metal cations. El-Sayed's group is trying to answer five fundamental questions: 1) What is the primary step taking place in the retinal structural changes leading to its photoisomerization; 2) What is the molecular mechanism of the protein catalysis of the photoisomerization; 3) What is the role of metal cations in the proton pump function; 4) How are the protons transported from the interior to the surface of the bR cell; 5) why does the protein in bacteriorhodopsin have such a high melting temperature?

【相关链接】
  Journal of Physical Chemistry A
  Journal of Physical Chemistry B
  2002年美国化学会国家奖获得者 (ACS 2002 National Award Recipients)
  美国乔治亚理工学院:化学与生物化学系


Summary by 杨宏伟 on 2003-12-08

Last updated by 杨宏伟 on 2003-12-08

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