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Siyuan Lu

Assistant Professor (Research) of Physics and Ophthalmology

Contact Information
Phone: (213) 740-1691
Office: VHE 508



Ph.D. Physics, University of Southern California, 12/2006
B.S. Physics, Fudan University, 7/2001

Postdoctoral Training

Postdoctoral Research Associate, Depts of Ophthalmology and Physics, Unversity of Southern California, 01/2007-01/2009  

Description of Research

Summary Statement of Research Interests

Siyuan Lu’ highly multi-disciplinary research has focused upon the synthesis, surface chemical and biochemical functionalization of novel nanocrystal based hybrid quantum nanostructure and the optical spectroscopic characterization (including time-resolved) of the charge and energy transfer dynamics in such nanostructure which are of fundamental importance to their use in applications ranging from solar energy conversion to biochemical sensing and manipulation of the action potential firing in neuronal cells. He has introduced the new paradigm of nonradiative resonant energy transfer (NRET) as a potentially viable mechanism for photovoltaic solar energy conversion using all-inorganic integrated nanowire-quantum dot systems that bypass the bottleneck of efficient charge collection faced by approaches involving organic materials. Another focus is the application of optical techniques to the simultaneous dynamics of multiple intra-and intercellular processes in live cells under controlled applied stress, probed via optical techniques including near-field spectroscopy. A particular current focus is on the growth of nanotemplate-directed epitaxical single and multiple coupled quantum dot structures suited for single photon emitters and their emission characteristics as needed for quantum cryptography.

Research Keywords

Optical Spectroscopy; Solar Cell; Energy Conversion; Photovoltaic Cells; Quantum Dots; Nanowires; Nanotubes; Förster Energy Transfer; Resonant Energy Transfer; High Mobility Channels; Apoptosis; Axonal Transport; Retinal Ganglion Cell; Live Cell Imaging; Optical Microcopy; Near Field Optical Microscopy; Atomic Force Microscopy; Nanosystem;

Research Specialties

1. Synthesis of colloidal nanocrystal quantum structures having photoresponse in the visible and near infrared wavelength regimes of relevance to optoelectronics, solar energy conversion, and retinal vision systems. 2. Molecular Beam Epitaxy 3. Optical Spectroscopy, including Absorption / Photoluminescence (PL) / PL Excitation (PLE). Time-Resolved PL (TRPL) Spectroscopy and Time-Resolved Photocurrent Spectroscopy. 4. Optical microscopy for live cell imaging, including near-field scanning optical microscopy (NSOM). 5. Atomic force microscopy (AFM), including AFM of soft matter (peptides and proteins) and biological cells (cancer and neuronal) in liquid environment. 6. AFM based probing of surface potential, including under photo-excitation. 7. High-resolution scanning electron microscopy (HRSEM). 8. Semiconductor processing (lithography, thin film deposition, etching, oxidization etc.) 9. Surface chemical modification of semiconductor and ceramic prosthetic surfaces using self-assembling organic and organic-peptide bioconjugate bi-linkers for cell adhesion. 10. Cell line culture and quantum dot based cell labeling 11. Instrument development / automation. Programming for Windows / Microcontroller / Computer-Instrument Interface.

Multimedia Scholarship and Creative Works

Patent Application, S. Lu, A. Madhukar, M. Humayun, "Functional Abiotic Nanosystems", US Utility Patent Application, Publication # US 2009/0088843 A1 (2009)., Spring 2009   
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