The objectives of this grant were to (a) examine the solution crystallization of RDX, HMX and CL-20 from a variety of solvents, with detailed analysis of their phase, size, and morphological properties; (b) to prepare and fully characterize a library of gold-thiol and siloxane monolayers that can serve as crystal nucleation templates and (c) to assess the growth of RDX, HMX and CL-20 on these templates.