Multilayered Al/CuO thermite was deposited by a dc reactive magnetron sputtering method. Pure Al and Cu targets were used in argon–oxygen gas mixture plasma with an oxygen partial pressure of 0.13 Pa. The process designed to produce low stress (<50 MPa) multilayered nanoenergetic material, each layer being the range tens nanometer one micron. reaction temperature heat measured using differential scanning calorimetry thermal analysis compare nanostructured layered materials...

A nano initiator is developed by integrating Al/CuO-based nanoenergetic materials with a Au/Pt/Cr thin-film microheater realized onto glass substrate. It fabricated using standard microsystem techniques that allow batch fabrication and high level of integration reliability. The characterized open-air combustion testing an ignition success rate 98%. ejected flame seen clearly potential exceeding 2000 . power, delay, energy are 1.16 W, 0.1-0.6 ms, 0.12-0.70 mJ, respectively. output calculated...

Abstract Over the next few years, it is expected that new, energetic, multifunctional materials will be engineered. There a need for new methods to assemble such from manufactured nanopowders. In this article, we demonstrate DNA‐directed assembly procedure produce highly energetic nanocomposites by assembling Al and CuO nanoparticles into micrometer‐sized particles of an Al/CuO nanocomposite, which has exquisite performance in comparison with its physically mixed counterparts. Using 80 nm...

Large-area and aligned copper oxide nanowires have been synthesized by thermal annealing of thin films deposited onto silicon substrate. The effects the film deposition method, temperature, thickness, gas, patterning photolithography are systematically investigated. Long can only be formed within a narrow temperature range from 400 to 500 °C. Electroplated is favourable for nanowire growth, compared that evaporation. Annealing in static air produces large-area, uniform, but not well...

Varied SiNx films have been deposited by low pressure chemical vapor deposition from silane SiH4 and ammonia NH3 the influences of parameters (temperature, total NH3/SiH4 gaseous ratio) on film rate, refractive index (assessed at a 830 nm wavelength), stoichiometry thermomechanical stress are investigated correlated. Low (≈600 MPa) Si3N4 obtained for highest temperature lowest but ratio is shown to be dominant parameter. According stoichiometry, silicon-rich silicon nitride nitrogen-doped...

Nanoenergetic materials (nEMs) have improved performances compared to their bulk counterpart or microcounterpart. The authors propose an approach synthesize Al∕CuO based nEM that has several advantages over previous investigations such as enhanced contact, reduced impurities and Al oxidation, tailored dimensions, easier integration into microsystem. CuO nanowires are synthesized by thermally annealing Cu film deposited onto silicon. Nano-Al is integrated with the realize nEM. characterized...

Interface layers between reactive and energetic materials in nanolaminates or nanoenergetic are believed to play a crucial role the properties of systems. Typically, case Metastable Interstitial Composite nanolaminates, interface layer metal oxide controls onset reaction temperature, kinetics, stability at low temperature. So far, formation these interfacial is not well understood for lack situ characterization, leading poor control important properties. We have combined infrared...

We have developed a new nanothermite based polymeric electro-thermal initiator for non-contact ignition of propellant. A reactive Al/CuO multilayer resides on 100 µm thick SU-8/PET (polyethyleneterephtalate) membrane to insulate the layer from silicon bulk substrate. When current is supplied initiator, chemical reaction Al+CuO occurs and sparkles are spread distance several millimeters. micro-manufacturing process fabricating presented electrical behaviors elements also investigated. The...

Two decades ago, the exploration of nanochemistry and nanotechnologies opened up a bottom-up approach in architecture matter, from atom to millimeter, engineered nano-energetic materials with precision control fuel oxidizer. The main idea energetics is enhance surface area intimacy between reactive components increase reaction rate decrease ignition delay, while improving safety. This special edition PEP examines state-of-the-art after two decades. Synthesis ingredients (typically aluminum)...

Abstract This paper reports on the reaction characteristic of Al/CuO reactive nanolaminates for different stoichiometries and bilayer thicknesses. are deposited by a DC magnetron sputtering method. Pure Al Cu targets used in argon‐oxygen gas mixture plasma an oxygen partial pressure 0.13 Pa. process produces low stress multilayered materials, each layer being range 25 nanometers to one micrometer. Their structural, morphological, chemical properties were characterized high resolution...

In situ deposition of a thin (∼5 nm) layer copper between Al and CuO layers is shown to increase the overall nanolaminate material reactivity. A combination transmission electron microscopy imaging, in infrared spectroscopy, low energy ion scattering measurements, first-principles calculations reveals that spontaneously diffuses into aluminum (substantially less layers). The formation an interfacial Al:Cu alloy with melting temperature lower than pure metal responsible for enhanced...

Abstract Sputter‐deposited Al/CuO multilayers represent the state‐of‐the‐art of energetic nanomaterials for tunable ignition and actuation because their theoretical energy densities are significantly higher than most conventional secondary explosives while being less sensitive to undesired initiation. Both sensitivity combustion properties (temperature, velocity products reaction) can be manipulated via layering, reactant spacing stoichiometry multilayer and, a lesser extent, interface...

The ignition of the Al/CuO multilayered material is studied experimentally to explore effects heating surface area, layering, and film thickness on characteristics reaction performances. After description micro-initiator devices conditions, we show that area must be properly calibrated optimize nanothermite We demonstrated a 0.25 mm2 sufficient ignite thermite 1.6 mm wide by few cm long, with success rate 100%. A new analytical phenomenological model based atomic diffusion across layers...

The paper elucidates the main driving mechanisms at play during early stage of Ti/CuO thermite reaction using reactive forcefields in frame molecular dynamics calculations. Results show that TiO preferentially forms immediate contact to pure Ti temperatures as low 200 K rather than TiO2. Increasing temperature 700 K, 2 nm TiO2 is found be homogeneously depleted from half its oxygen atoms. Also, first signs CuO decomposition are observed 600 correlation with impoverishment atom reaching...