title: An efficient microwave-assisted synthesis method for the production of water soluble amine-terminated Si nanoparticles.
abstract: Silicon nanoparticles can be considered a green material, especially when prepared via a microwave-assisted method without the use of highly reactive reducing agents or hydrofluoric acid. A simple solution synthesis of hydrogen-terminated Si- and Mn-doped Si nanoparticles via microwave-assisted synthesis is demonstrated. The reaction of the Zintl salt, Na(4)Si(4), or Mn-doped Na(4)Si(4), Na(4)Si(4(Mn)), with ammonium bromide, NH(4)Br, produces small dispersible nanoparticles along with larger particles that precipitate. Allylamine and 1-amino-10-undecene were reacted with the hydrogen-terminated Si nanoparticles to provide water solubility and stability. A one-pot, single-reaction process and a one-pot, two-step reaction process were investigated. Details of the microwave-assisted process are provided, with the optimal synthesis being the one-pot, two-step reaction procedure and a total time of about 15 min. The nanoparticles were characterized by transmission electron microscopy (TEM), x-ray diffraction, and fluorescence spectroscopies. The microwave-assisted method reliably produces a narrow size distribution of Si nanoparticles in solution.
authors: Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616, USA.
authors: Tonya M
authors: TM
authors: Atkins
authors: Angelique Y
authors: AY
authors: Louie
authors: Susan M
authors: SM
authors: Kauzlarich
mesh_terms: D000588:Amines / Q000737:chemistry*; D055772:Green Chemistry Technology / Q000191:economics / Q000379:methods*; D008872:Microwaves; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000191:economics / Q000379:methods*; D012825:Silicon / Q000737:chemistry*; D012995:Solubility; D014867:Water / Q000737:chemistry
chemical_list: D000588:Amines; D014867:Water; D012825:Silicon