Si Wire Supported MnO2/Al/Fluorocarbon 3D Core/Shell Nanoenergetic Arrays with Long-Term Storage Stability

Abstract

Three-dimensional MnO2/Al/fluorocarbon core/shell nanoenergetic arrays are prepared on silicon substrate that is with silicon wires on top. Silicon wires are first prepared as the scaffolds by maskless deep reactive ion etching of silicon wafer, which is followed by the hydrothermal growth of MnO2. Al and fluorocarbon are then deposited sequentially around the silicon wire (Si-W) supported MnO2 arrays by magnetron sputtering to realize the core/shell nanoenergetic composite. Several characterization techniques are used to investigate the prepared Si-W/MnO2/Al/fluorocarbon arrays, including the scanning electron microscopy, transmission electron microscopy, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, and thermal analysis. 3D upright aligned core/shell structure with an intimate contact between MnO2 and Al is confirmed from the morphological characterization. Superhydrophobicity is achieved after the fluorocarbon coating. Most importantly, the Si-W/MnO2/Al/fluorocarbon nanoenergetic arrays show no decay of energy density after 9 months of storage, indicating potential applications in nanoenergetics-on-a-chip when long-term storage is needed.

Study on thermal behavior and kinetics of Al/MnO2 poly(vinylidene fluorine) energetic nanocomposite assembled by electrospray

“…3(c) , which is in agreement with the oxidation state of Mn at 4. 20 As for the listing of atomic% in Table 1 , the ratio of the content of Mn to O is about 1 : 2.…”

“…Namely, Al/MnO 2 thermite system could be potential energetic materials in the future. Zhu 20 has prepared the 3-D core/shell nanoenergetic arrays of MnO 2 /Al/fluorocarbon via magnetron sputtering based on Si substrate, which showed a superior competence of energy storage.…”

In situ molecule-level interface tailoring of metastable intermolecular composite chips toward on-demand heat release and information encryption

“…Several attempts have been made for designing superhydrophobic MICs to prevent water erosion, making their underwater applications possible. [13][14][15][16] For instance, S. H. Kim et al proposed a self-assembly technique for preparing a ash-ignitable sea urchin-like carbon nanotubes@Al/CuO MIC with a water contact angle of 88°, which can rapidly release thermal energy by absorbing irradiated ash energy. 17 The superhydrophobic CuO/Mg/ uorocarbon sandwich-structure MIC with an anti-humidity property was dexterously fabricated by the combination of ebeam/thermal evaporation and a sputtering method, and it maintained about 82% chemical energy aer 240 h of exposure.…”

Facile fabrication of highly exothermic CuO@Al nanothermites via self-assembly approach

“…Recently, many unique structures have been designed to enhance the extent of contact between fuel and oxidizer in thermites. The heat release of thermites with special construction (core-shell [17][18][19], array [20,21] laminate [22][23][24][25][26]) is usually greater than the samples prepared by physical mixing method. In particular, thermites with coreshell structure have been widely investigated to achieve high exothermic performance.…”