title: Galvanic porous silicon composites for high-velocity nanoenergetics.
abstract: Porous silicon (PS) films ∼65-95 μm thick composed of pores with diameters less than 3 nm were fabricated using a galvanic etching approach that does not require an external power supply. A highly reactive, nanoenergetic composite was then created by impregnating the nanoscale pores with the strong oxidizer, sodium perchlorate (NaClO(4)). The combustion propagation velocity of the energetic composite was measured using microfabricated diagnostic devices in conjunction with high-speed optical imaging up to 930000 frames per second. Combustion velocities averaging 3050 m/s were observed for PS films with specific surface areas of ∼840 m(2)/g and porosities of 65-67%.
authors.affiliation: Department of Mechanical Engineering, University of Colorado, Boulder, Colorado 80309, USA.
authors.forename: Collin R
authors.initials: CR
authors.lastname: Becker
authors.forename: Steven
authors.initials: S
authors.lastname: Apperson
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Morris
authors.forename: Shubhra
authors.initials: S
authors.lastname: Gangopadhyay
authors.forename: Luke J
authors.initials: LJ
authors.lastname: Currano
authors.forename: Wayne A
authors.initials: WA
authors.lastname: Churaman
authors.forename: Conrad R
authors.initials: CR
authors.lastname: Stoldt
mesh_terms: D003460:Crystallization / Q000379:methods*; D004595:Electroplating / Q000379:methods*; D006358:Hot Temperature; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D016062:Porosity; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D012825:Silicon