%0 Journal Article 
%A Isaac, N.A.
%A Schlag, L.
%A Ispas, A.
%A Reiprich, J.
%A Soydan, A.K
%A Moreira, P.H.O.
%A Thiele, S.
%A Aliabadian, B.
%A Flock, D.
%A Knauer, A.
%A Jiménez Ríos, Juan Jesús
%A Bund, A.
%A Morales Sánchez, Francisco Miguel
%A Pezoldt, J.
%A Jacobs, H.O.
%T Novel Gas Phase Route Toward Patterned Deposition of Sputter-Free Pt/Al Nanofoils
%D 2023
%@ 2365-709X
%U http://hdl.handle.net/10498/31359
%X This article reports a new approach toward fabrication and directed assembly of nanoparticulate reactive system (Nanofoils) on patterned substrates. Different from current state-of-the-art, gas phase electrodeposition uses nanoparticles instead of atoms to form densely packed multilayered thin films at room temperature-pressure. On ignition, the multilayer system undergoes an exothermic self-propagating reaction. The numerous contact points between two metallic nanoparticulate layers aid in high heat release. Sub-10-nm Platinum (Pt) and Aluminum (Al) particles are synthesized through cathode erosion of metal electrodes in a flow of pure nitrogen gas (spark ablation). Pt/Al bilayer stacks with total thickness of 3–8 µm undergo self-propagating reaction with a 10.3 mm s−1 wavefront velocity on local ignition. The reaction wavefront is captured using high speed videography. Calorimetry studies reveal two exothermic peaks suggesting Pt/Al alloy formation. The peak at 135 °C has a higher calorific value of 150 mW g−1 while the peak at 400 °C has a 12 mW g−1 exothermic peak. X-ray diffraction study shows reaction-products are cubic Al2Pt with small quantities of orthorhombic Al6Pt and orthorhombic AlPt2. Electron microscopy studies help draw a correlation between film morphology, bimetallic interface, nanoparticle oxidation, and self-propagating reaction kinetics that is significant in broadening our understanding towards nanoparticulate reactive systems.
%K energy conversion
%K energy storages
%~ Universidad de Cádiz