title: Nanowire membrane-based nanothermite: towards processable and tunable interfacial diffusion for solid state reactions.
abstract: Interfacial diffusion is of great importance in determining the performance of solid-state reactions. For nanometer sized particles, some solid-state reactions can be triggered accidently by mechanical stress owing to their large surface-to-volume ratio compared with the bulk ones. Therefore, a great challenge is the control of interfacial diffusion for solid state reactions, especially for energetic materials. Here we demonstrate, through the example of nanowire-based thermite membrane, that the thermite solid-state reaction can be easily tuned via the introduction of low-surface-energy coating layer. Moreover, this silicon-coated thermite membrane exhibit controlled wetting behavior ranging from superhydrophilic to superhydrophobic and, simultaneously, to significantly reduce the friction sensitivity of thermite membrane. This effect enables to increase interfacial resistance by increasing the amount of coating material. Indeed, our results described here make it possible to tune the solid-state reactions through the manipulation of interfacial diffusion between the reactants.
authors.affiliation: Department of Chemistry, Tsinghua University, Beijing 100084, PR China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Yang
authors.forename: Peng-peng
authors.initials: PP
authors.lastname: Wang
authors.forename: Zhi-cheng
authors.initials: ZC
authors.lastname: Zhang
authors.forename: Hui-ling
authors.initials: HL
authors.lastname: Liu
authors.forename: Jingchao
authors.initials: J
authors.lastname: Zhang
authors.forename: Jing
authors.initials: J
authors.lastname: Zhuang
authors.forename: Xun
authors.initials: X
authors.lastname: Wang
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D004058:Diffusion; D005290:Ferric Compounds / Q000737:chemistry*; D008422:Materials Testing; D008567:Membranes, Artificial; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D005290:Ferric Compounds; D008567:Membranes, Artificial; C000499:ferric oxide; D000535:Aluminum