title: Purification implications on SERS activity of silica coated gold nanospheres.
abstract: Silica coated gold nanospheres are purified using traditional centrifugation steps and/or anion exchange chromatography and their resulting surface-enhanced Raman activities compared. Partially silica-coated gold nanostructures are retained on the column while fully coated nanostructures elute. As a result, SERS activity becomes less erratic and follows distance dependence models. This simple chromatographic step adds a quality control measure to nanoparticle preparation which could be extended to other solution-phase nanoparticles for more predictable function in future applications.
authors.affiliation: Department of Chemistry, University of Iowa, Iowa City, 52242, United States.
authors.forename: Marie Carmelle S
authors.initials: MC
authors.lastname: Pierre
authors.forename: Amanda J
authors.initials: AJ
authors.lastname: Haes