Nano-scale energetic films by superfluid helium droplet assembly

18th APS-SCCM; 24th AIRAPT

Emery, S.B.^1 ; Boyle, J.M.^2 ; Rider, K.B.^2,3 ; Little, B.K.^1 ; Lindsay, C.M.^1

Energetic Materials Branch, Ordnance Division, U.S. Air Force Research Laboratory, 2306 Perimeter Rd., Eglin AFB

FL

32542-5910, United States^1

NSWC IHD Dynamics and Diagnostics Branch, Research and Technology Division, 4104 Evans Way, Indian Head

MD

20640, United States^2

Babcock and Wilcox, 2016 Mt. Athos Road, Lynchburg

VA

24504, United States^3

关键词: Chemical physics;    Core-shell clusters;    Film deposition techniques;    Higher energy density;    Limiting effects;    Superfluid helium droplets;    Ultra low temperatures;    Van der Waals complex;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/5/052012/pdf
DOI  :  10.1088/1742-6596/500/5/052012

来源: IOP

【 摘 要 】

The helium droplet technique has been utilized to study a wide range of topics in chemical physics such as atomic scale manifestations of superfluidity, chemistry at ultra-low temperatures, and the assembly of exotic Van der Waals complexes. Our efforts have transitioned the helium droplet methodology from a cryogenic nano-scale matrix to a film deposition technique capable of creating nano-structured films of composite metal-based energetic materials (EM). Such materials are ideal candidates to study propagation of reactions at small scale, and could be alternatives to organic based EM due to their higher energy densities. The helium droplet methodology may also provide a solution overcoming issues of reaction-limiting effects such as the formation of oxide layers by exploiting 'magic-number' cluster sizes and core-shell cluster mechanisms. This proceeding describes our previously reported efforts to model and characterize the deposition of magnesium clusters by superfluid helium droplet assembly, our efforts to produce magnesium-Fomblin core-shell EM cluster-based films, and our early attempts at making intermetallic cluster-based films.