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

Abstract

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 Cs 2 Mo 6 Br 14 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.

Preparation by electrophoretic deposition of molybdenum iodide cluster-based functional nanostructured photoelectrodes for solar cells

“…Based on previous works carried out on the coating of Mo 6 or Ta 6 cluster-based compounds on TCO glass substrates (FTO or ITO), [52,[71][72][73][74] the first part of this study is dedicated to the EPD of molybdenum iodide on FTO (CMI@FTO). The quality and the thickness of the coating prepared by EPD depend on i) the stability, the solvation state and the concentration of the dispersion solution, ii) the applied voltage which determines the generated current and thus the energy given to the particles in suspension and iii) the deposition time.…”

“…Moreover, Cs atoms were not clearly detectable, which is consistent with previous studies. [43,[71][72][73][74] During the EPD process, due to their respective charge, the anionic Mo 6 -based cluster nanoparticles and Cs + cations migrate at the opposite electrodes ; anionic Mo 6 -clusters migrate toward the anode and Cs + go to the cathode side. Based on the published studies discussing the formation mechanism of molybdenum bromide-based films, [72,81] we assume the formation of a cluster species.…”

“…technique (EPD). This was recently successfully applied to the deposition of Mo 6 [71][72][73][74] or Ta 6 [52,74]…”

Enhancement of thermal interface material properties using carbon nanotubes through simple electrophoretic deposition method

“…One of the biggest challenges for CNT applications in TIM is the difficulty of combining CNTs with other materials and their proper positioning on the substrate of TIM packaging known as the heat spreader. Many conventional methods, including growth methods, such as CVD and various coating methods (spin coating, electrophoretic, electroplating, and screen printing) are used to place materials on the heat spreader . Growth methods, such as CVD, are beneficial for providing good material and mechanical contacts with the surface.…”

“…On the basis of the current situation, this study proposes the development of CNTs as TIMs to enhance the occurrence of heat dissipation systems in microelectronic devices. The CNTs are prepared for coating on the heat spreader (nickel‐plated copper substrate) using the electrophoretic deposition (EPD) method; this method is employed because of its several benefits, such as simple experimental setup, room temperature operation, short deposition time, and high purity and CNT quality . This study aims to obtain the optimum process of CNT development on heat spreaders using the EPD method by studying operating parameters in EPD, which influence CNT deposition.…”