Supporting Information of the Manuscript: Damping Off Terahertz Sound Modes of a Liquid Upon Immersion of Nanoparticles Alessio De Francesco, 1 Luisa Scaccia, 2 Marco Maccarini, 3 Ferdinando Formisano, 1 Yugang Zhang, 4 Oleg Gang, 5,6 Dmytro Nykypanchuk, 5 Ayman H. Said, 7 Bogdan M. Leu, 7,8 Ahmet Alatas, 7 Yong Q. Cai, 4 Alessandro Cunsolo 4 1. Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali c/o OGG Grenoble, France 2. Dipartimento di Economia e Diritto, Universita’ di Macerata, Via Crescimbeni 20, 62100 Macerata, Italy 3. Université Grenoble-Alpes - Laboratoire TIMC/IMAG UMR CNRS 5525 Grenoble, France 4. National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA; acunsolo@bnl.gov; Tel.: +1-631-344-5564; Fax: +1- 631-344-8189 5. Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States. 6. Department of Chemical Engineering and Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States