Vol. 24 No. 2 (2025): Mapana Journal of Sciences
Review Articles

A Review of Nano Structured Thermites and Explosives: Synthesis and Emerging Applications

Agin P
Department of Forensic Science, AJK College of Arts and Science, Coimbatore, Tamil Nadu, India
Ashisha A Aloysius
Department of Forensic Science, AJK College of Arts and Science, Coimbatore, Tamil Nadu
Bio
Dhaneesh K John
Department of Forensic Science, AJK College of Arts and Science, Coimbatore, Tamil Nadu

Published 2025-07-22

Keywords

  • Nanoparticles,
  • Nanothermites,
  • Pyrotechnics,
  • Green Synthesis

Abstract

Primary explosives have been a crucial component of defense systems since long, but the currently used lead-based primary explosives are highly harmful to the environment and toxic to living beings. Nanostructured materials have offered quite an improvement in this regard, offering a greener source of primary explosive with improved safety and reliability, while also offering better performance. This has led many major military groups to conduct considerable research in this domain. The SFE method is a highly efficient and favoured method for the production of such nanoenergetic materials, offering good productivity and industrial compatibility for mass-scale manufacturing. The nanoenergetic particles thus prepared, exhibit better combustion properties when mixed with nanothermites to form NSTEX composites. These loose powder composites have shown considerable improvement with respect to metal-based primary explosives which are currently employed in explosive and pyrotechnic applications. However, the ultimate challenge that exists in this domain is the production of practical and operational systems from these highly energetic nanopowders. This research is still in its early stages and breakthrough in this domain may unlock a vast array of opportunities for the development of safer and more efficient defence systems.

References

  1. Risse B, Spitzer D, Hassler D, Schnell F, Comet M, Pichot V, Muhr H (2012) Continuous formation of submicron energetic particles by the flash-evaporation technique. Chem Eng J 203:158–165. https:// doi.org/10.1016/j.cej.2012.07.032
  2. Comet M, Martin C, Schnell F, Spitzer D (2019) Energetic Nanoparticles and Nanomaterials for Future Defense Applications. Human Factors and Mechanical Engineering for Defense and Safety 3: 1. https://doi.org/10.1007/s41314-019-0016-6
  3. Lobry E. Berthe J-E, Spitzer D (2021) Spray flash evaporation SFE process: Identification of the driving parameters on evaporation to tune particle size and morphology. Chemical Engineering Science 231:116-307. https://doi.org/10.1016/j.ces.2020.116307
  4. Comet M, Martin C, Klaumünzer M, Schnell F, Spitzer D (2015) Energetic nanocomposites for detonation initiation in high explosives without primary explosives. Appl Phys Lett 107:243108. https://doi.org/10.1063/1.4938139
  5. Stepanov, V., Krasnoperov, L., Elkina, I. and Zhang, X. (2005), Production of Nanocrystalline RDX by Rapid Expansion of Supercritical Solutions. Propellants, Explosives, Pyrotechnics, 30: 178-183. https://doi.org/10.1002/prep.200500002
  6. Spitzer, D., Risse, B., Schnell, F. et al. Continuous engineering of nano-cocrystals for medical and energetic applications. Sci Rep 4, 6575 (2014). https://doi.org/10.1038/srep06575
  7. Klaumünzer M, Hübner J, Spitzer D (2016) Production of energetic nanomaterials by Spray Flash Evaporation. World Acad Sci Eng Technol 10:1191–1195
  8. Séve A, Pichot V, Schnell F, Spitzer D (2017) Trinitrotoluene nanostructuring by Spray Flash Evaporation process. PropellantsExplos Pyrotech 42:1051–1056. https://doi.org/10.1002/prep.201700024
  9. Risse B, Schnell F, Spitzer D (2014) Synthesis and desensitization of nano-β-HMX. Propellants Explos Pyrotech 39:397–401. https://doi.org/10.1002/prep.201300161
  10. Deckert-Gaudig T, Pichot V, Spitzer D, Deckert V (2017) High resolution Raman spectroscopy for the nanostructural characterization of explosive nanodiamond precursors. ChemPhysChem 18: 175–178. https://doi.org/10.1002/cphc.201601276
  11. Spitzer D, Risse B, Schnell F, Pichot V, Klaumünzer M, Schaefer MR (2014) Continuous engineering of nano-cocrystals for medical and energetic applications. Sci Rep 4. https://doi.org/10.1038/srep06575
  12. Sundaram D, Yang V, Yetter RA (2017) Metal-based nanoenergetic materials: Synthesis, properties, and applications. Progress in Energy and Combustion Science 61: 293-365. https://doi.org/10.1016/j.pecs.2017.02.002
  13. Aumann CE, Skofronick GL, Martin JA (1995) Oxidation behavior of aluminum nanopowders. J Vacuum Sci Technol B; 13:1178.
  14. Schoenitz M, Ward T, Dreizin EL (2003) Preparation of Energetic Metastable Nano-Composite Materials by Arrested Reactive Milling. MRS Proceedings. 800:AA2.6. https://doi.org/10.1557/PROC-800-AA2.6
  15. Comet M, Vidick G, Schnell F, Suma Y, Baps B, Spitzer D (2015) Sulfates-based nanothermites: an expanding horizon for metastable interstitial composites. Angew Chem Int Ed 54:4458–4462. https://doi.org/10.1002/anie.201410634
  16. Prentice D, Pantoya ML, Gash AE (2006) Combustion wave speeds of sol−gel-synthesized tungsten trioxide and nano-aluminum: the effect of impurities on flame propagation. Energy Fuel 20:2370–2376. https://doi.org/10.1021/ef060210i
  17. Levitas VI, Asay BW, Son SF, Pantoya M (2007) Mechanochemical mechanism for fast reaction of metastable inter-molecular composites based on dispersion of liquid metal. J Appl Phys 101:083524. https://doi.org/10.1063/1.2720182
  18. Levitas VI, Asay BW, Son SF, Pantoya M (2006) Melt dispersion mechanism for fast reaction of nanothermites. Appl Phys Lett 89: 071909. https://doi.org/10.1063/1.2335362
  19. Martin C, Comet M, Schnell F, Spitzer D (2017) Nanothermite with meringue-like morphology: from loose powder to ultra-porous objects. J Vis Exp. https://doi.org/10.3791/56479
  20. Comet M, Martin C, Schnell F, Spitzer D (2017) Nanothermite foams: from nanopowder to object. Chem Eng J 316:807–812. https://doi.org/10.1016/j.cej.2017.02.009
  21. 21. Sullivan KT, Kuntz JD, Gash AE (2012) Electrophoretic deposition and mechanistic studies of nano-Al/CuO thermites. J Appl Phys 112:024316. https://doi.org/10.1063/1.4737464