Energetic
cocrystals, especially CL-20-based cocrystals, have attracted
a wide range of attention due to their low sensitivity and impressive
detonation performance. In this study, a series of nanosized CL-20-based
energetic cocrystals were successfully
fabricated by electrospray deposition. For CL-20/TNT nanococrystals,
the influence of different solvents on the morphology and crystal
structure of as-prepared cocrystals were investigated. The results
showed that all the electrosprayed CL-20/TNT samples were partial
formation of cocrystals and particles obtained from ketone had smaller
size than those obtained from ethyl solvents. In contrast, electrosprayed
CL-20/DNB nanococrystals had completely formed the cocrystal structure
proved by DSC and PXRD. Moreover, the terahertz (THz) result confirmed
the formation of intermolecular hydrogen bonds. Additionally, we have
fabricated the CL-20/TNB cocrystals for the first time by using electrospray
method. The PXRD and DSC results confirmed the formation of this novel
energetic cocrystal. Expectedly, all the electrosprayed nanosized
CL-20-based cocrystals exhibited visible reduced impact sensitivity
compared with raw CL-20. The electrospray can thus offer a flexible
and versatile approach for continuous and high-yielding synthesis
of nanosized energetic cocrystals with preferable safety performance,
and provide an efficient screening to quickly distinguish whether
two energetic materials can form a cocrystal
