Electrophoretic Coating of Octahedral Molybdenum Metal Clusters for UV/NIR Light Screening

Thi Kim Ngan Nguyen (1, 2, 3) , Benjamin Dierre (1, 3) , Fabien Grasset (3, 1) , Noee Dumait (4) , Stéphane Cordier (4) , Pierric Lemoine (4) , Adèle Renaud (4) , Hiroshi Fudouzi (1) , Naoki Ohashi (1, 3) , Tetsuo Uchikoshi (1, 3, 2)

1 NIMS - National Institute for Materials Science
2 Hokkaido University [Sapporo, Japan]
3 LINK - Laboratory for Innovative Key Materials and Structures
4 ISCR - Institut des Sciences Chimiques de Rennes

Thin and transparent Mo-6 cluster films with significant optical properties were prepared on indium tin oxide (ITO)-coated glass plates from the suspension of Cs2Mo6Br14 cluster precursors dispersed in methyl-ethyl-ketone (MEK) by an electrophoretic deposition (EPD) process. Two kinds of polydimethylsiloxanes (PDMS); i.e., KF-96L-1.5CS and KF-96L-2CS corresponding to the kinetic viscosity of 1.5 and 2 centistokes, respectively, were selected to topcoat the Mo-6 cluster film after the EPD. The influence of the PDMS on the durability, chemical compatibility and light absorption property of Mo-6 cluster films were characterized by means of field-emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR), and ultraviolet-visible-near infrared (UV-Vis-NIR) spectroscopy. The stabilized PDMS-coated Mo-6 cluster film could be stored for more than 6 months under ambient conditions.

Keywords: methyl-ethyl-ketone; polydimethylsiloxane; UV /NIR absorption; electrophoretic deposition; molybdenum octahedral cluster; UV/NIR absorption

Domains: Chemical Sciences; Chemical Sciences; Material chemistry

Thi Kim Ngan Nguyen, Benjamin Dierre, Fabien Grasset, Noee Dumait, Stéphane Cordier, et al.. Electrophoretic Coating of Octahedral Molybdenum Metal Clusters for UV/NIR Light Screening. Coatings, 2017, 7 (8), pp.114. ⟨10.3390/coatings7080114⟩. ⟨hal-01614780⟩