title: Precise and rapid size selection and targeted deposition of nanoparticle populations using CO2 gas expanded liquids.
abstract: This paper demonstrates the rapid and precise size selection of nanoparticle populations using the pressure tunable solvent properties of CO2-expanded liquids. Specifically, by pressurizing and expanding a single organic solution with carbon dioxide gas, ligand-stabilized silver particles of desired mean size were size selectively precipitated at desired locations. Compared to current techniques, this CO2-expanded liquid approach provides for faster and more efficient particle size separation, reduction in organic solvent usage, and pressure tunable size selection.
authors.affiliation: Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, USA.
authors.forename: M Chandler
authors.initials: MC
authors.lastname: McLeod
authors.forename: Madhu
authors.initials: M
authors.lastname: Anand
authors.forename: Christopher L
authors.initials: CL
authors.lastname: Kitchens
authors.forename: Christopher B
authors.initials: CB
authors.lastname: Roberts
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D005740:Gases / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D011312:Pressure; D012834:Silver / Q000032:analysis / Q000737:chemistry*; D012996:Solutions
chemical_list: D005740:Gases; D012996:Solutions; D002245:Carbon Dioxide; D012834:Silver