Measuring the Force Constant of Semiconductor Nanocrystal Ligands
Understanding of long range thermal transport systems in semiconductor nanocrystals (NC) for energy applications, requires understanding of the inter-nanoparticle vibrations. We have shown that it is possible detect these inter-particle modes using inelastic neutron scattering at the FOCUS beamline (PSI, Switzerland) by tuning the nanoparticle size. In continuation experiments at FOCUS we plan to investigate the role of the NC surface ligands on these inter-particle vibrations. We propose to use neutron backscattering spectroscopy at ILL to determine a force constant for the NC ligands, to quantify their stiffness. Combining the FOCUS and ILL measurements will allow to draw conclusions about the dependence of the interparticle vibrational modes on the stiffness of the ligands used. Furthermore, we will compare these experimental results to our computational model and test strategies for optimizing these modes.
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JANSEN Maximilian; JURANYI Fanni and SEYDEL Tilo. (2020). Measuring the Force Constant of Semiconductor Nanocrystal Ligands. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-05-500
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