Prof. Rabani Eran
|Affiliation:||School of chemistry
|Postal Address:||School of chemistry|
Tel Aviv University
Tel Aviv 69978
Conductance in low-dimensional structures: We have recently developed a new approach to calculate transport in low dimensional systems that are driven out-of-equilibrium, where many-body effects such as electron-electron or electron-phonon interactions are important. Our approach is based on a real-time propagation of the many-body density matrix using real-time quantum Monte Carlo techniques. We have applied the approach to the Holstein model and provided the first exact numerical solution. In addition, we are at the stage of developing an approach to study a full time-dependent numerical solution of Anderson impurity model.
Structure of nanomaterials: We have been involved in the development of atomistic models to study structural properties of semiconductor nanocrystals and carbon nanotubes. We were the first to develop an atomistic force-field model for semiconductor nanocrystals and studied the structural properties of the interface between the inorganic core and the organic passivation layer. Recently, we have studied the six-to-four fold pressure induced phase transformation in CdSe nanocrystals using the atomistic model described above.
Energy transfer at the nanoscale: Fluorescence probes based on semiconducting nanocrystals are widely used in single molecule imaging and spectroscopy, and in the detection techniques of proteins, peptides, and enzymes. We have developed a theory for the fluorescence resonance energy transfer (FRET) between a pair of semiconducting nanocrystal quantum dots in order to obtain the proper structural information of such probes. The theory relates the FRET rate to measurable quantities such as the nanocrystal size, fundamental gap, effective mass, exciton radius and dielectric constant.
Multiexciton Generation in Nanocrystals: Multiexciton generation (MEG) is a process where several excitons are generated upon the absorption of a single photon in semiconductors. We have recently developed a theory to understand the processes of multiexciton generation in semiconducting nanocrystals and in carbon nanotubes photodiodes. A detailed analysis of the effects of material, size, excitation energy, and confinement was carried out.
Self Assembly of nanorods: The assembly of shaped-control nanoparticles is an extremely important field of research due to the potential application of anisotropic systems. We have recently developed a lattice-gas model to explain the physical nature of self-assembly of nanorods. Our model provides a detailed picture of the timescales and length scales governing the assembly process. The competition of drying kinetic, spatial and rotational diffusion, and aspect ratio of the nanorods was explored in great detail.