title: Production of pristine, sulfur-coated and silicon-alloyed germanium nanoparticles via laser pyrolysis.
abstract: Here we demonstrate production of three types of germanium containing nanoparticles (NPs) by laser pyrolysis of GeH4 and characterize their sizes, structures and composition. Pristine Ge NPs were fabricated with 50 standard cubic centimeter per minute (sccm) of GeH4 and 25 sccm of SF6 as a photosensitizer gas, while sulfur-coated Ge NPs were produced with 25 sccm of GeH4 and 50 sccm of SF6. The laser pyrolysis of SiH4/GeH4 mixtures produced Si1-xGex alloy NPs. Effects of key process parameters including laser intensity and gas flow rates on NP properties have been investigated. The ability of the laser pyrolysis technique to flexibly produce a variety of germanium-containing NPs, as illustrated in this study shows promise for commercial-scale production of new nanomaterials as high purity dry powders.
authors.affiliation: School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea. Department of Chemical and Biological Engineering, The State University of New York at Buffalo, Buffalo, NY 14260, USA.
authors.forename: Seongbeom
authors.initials: S
authors.lastname: Kim
authors.forename: Song
authors.initials: S
authors.lastname: Yi Park
authors.forename: Jaeki
authors.initials: J
authors.lastname: Jeong
authors.forename: Gi-Hwan
authors.initials: GH
authors.lastname: Kim
authors.forename: Parham
authors.initials: P
authors.lastname: Rohani
authors.forename: Dong
authors.initials: D
authors.lastname: Suk Kim
authors.forename: Mark T
authors.initials: MT
authors.lastname: Swihart
authors.forename: Jin
authors.initials: J
authors.lastname: Young Kim