Dresden 2017 – scientific programme

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O: Fachverband Oberflächenphysik

O 52: Nanostructures at Surfaces: Dots, Particles, Clusters

O 52.4: Poster

Tuesday, March 21, 2017, 18:30–20:30, P1C

Formation and stabilization of silver and gold nanoparticles in room temperature ionic liquids. — •Alexander Kononov, Stefanie Roese, Florian Lippert, and Heinz Hövel — Fakultät Physik/DELTA, TU Dortmund, Otto-Hahn-Str. 4, 44221 Dortmund, Germany

Room temperature ionic liquids (RTILs) are chemically stable salts in the liquid phase at room temperature (RT) with negligible vapour pressure, which makes them suitable for vacuum applications. RTILs form a self organized structure of cations and anions by hydrogen bonds, which allow steric and electronic stabilization of metallic nanoparticles (NPs) [1].
Deposition of metal atoms on the RTIL surface leads to the formation of metal NPs in the RTIL [2,3]. For a better understanding of the formation mechanism of silver and gold NPs, several samples were prepared by magnetron sputter deposition into an RTIL (BMIM PF₆) under different sputter conditions. Formation and aggregation processes of NPs stored at different temperatures were detected (after sputtering at RT) by UV/Vis absorption measurements. Afterwards the sputtered Ag RTIL samples are compared to samples produced by deposition of clusters preformed in a supersonic expansion [4].
J. Dupont, J. D. Scholten, Chem. Soc. Rev. 39, 1780, (2010). [2] K. Richter, A. Birkner, A. Mudring, Phys. Chem. Chem. Phys. 13, 7136, (2011). [3] T. Torimoto, K. Okazaki, T. Kiyama, K. Hirahara, N. Tanaka, S. Kuwabata, Appl.Phys.Lett. 89, 243117, (2006). [4] D. C. Engemann, S. Roese, H. Hövel, J. Phys. Chem. 120, 6239, (2016).