General Information

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Matthew Sfeir

Staff Scientist | Advanced Optical Spectroscopy and Microscopy

Expertise

  • Time-Resolved & Nonlinear Spectroscopy
  • Carrier Dynamics in Nanostructures
  • Light Harvesting Devices
  • Fourier Transform Photocurrent Methods
  • Nanocluster & Nanoparticle Characterization
  • Organic Photovoltaics
  • Multidimensional Analysis Methods

CFN Research Activities

My interests are in the development and application of broadband optical probes and analysis methods to study novel chromophore and nanomaterial based light harvesting devices. In particular, my research program focuses on interfacial electronic phenomenon and their role in promoting efficient interactions (e.g., charge transfer) between extended systems. Using time-resolved, nonlinear, and optoelectronic probes, my goal is to highlight unifying features and demonstrate the connection between atomic and macroscopic length scales in disparate materials systems, including multidimensional heterostructures of organic semiconductors, quantum dots, and nanocluster materials. 

Education

  • S.B.: University of Chicago
  • PhD: Columbia University
    • Interdisciplinary Graduate Program in Chemical Physics
    • Dissertation Title: Probing the Electronic Structure of Carbon Nanotubes Using Rayleigh Scattering

Professional Appointments

  • Postdoctoral Research: Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science Department
    • Project: Infrared Photocurrent Spectroscopy of Individual 1D Nanostructures

Selected Publications & Research Highlights

X. H. Peng, J. A. Misewich, S. S. Wong, M. Y. Sfeir, Efficient Charge Separation in Multidimensional Nanohybrids, Nano Letters 11 (11) 4562 (2011).

M. Y. Sfeir, H. F. Qian, K. Nobusada, R. C. Jin, Ultrafast Relaxation Dynamics of Rod-Shaped 25-Atom Gold Nanoclusters, Journal of Physical Chemistry C 115 (14) 6200 (2011).

H. F. Qian, M. Y. Sfeir, R. C. Jin, Ultrafast Relaxation Dynamics of [Au-25(SR)(18)](q) Nanoclusters: Effects of Charge State, Journal of Physical Chemistry C 114 (47) 19935 (2010). 

M. Y. Sfeir, et. al., Infrared spectra of individual semiconducting single-walled carbon nanotubes: Testing the scaling of transition energies for large diameter nanotubes, Physical Review B  82 (19) 195424 (2010).

H. M. Xiong, M. Y. Sfeir, O. Gang, Assembly, Structure and Optical Response of Three-Dimensional Dynamically Tunable Multicomponent Superlattices, Nano Letters 10 (11) 4456 (2010).