title: Combining the Masking and Scaffolding Modalities of Colloidal Crystal Templates: Plasmonic Nanoparticle Arrays with Multiple Periodicities.
abstract: Surface patterns with prescribed structures and properties are highly desirable for a variety of applications. Increasing the heterogeneity of surface patterns is frequently required. This work opens a new avenue toward creating nanoparticle arrays with multiple periodicities by combining two generally separately applied modalities (i.e., scaffolding and masking) of a monolayer colloidal crystal (MCC) template. Highly ordered, loosely packed binary and ternary surface patterns are realized by a single-step thermal treatment of a gold thin-film-coated MCC and a nonclose-packed MCC template. Our approach enables control of the parameters defining these nanoscale binary and ternary surface patterns, such as particle size, shape, and composition, as well as the interparticle spacing. This technique enables preparation of well-defined binary and ternary surface patterns to achieve customized plasmonic properties. Moreover, with their easy programmability and excellent scalability, the binary and ternary surface patterns presented here could have valuable applications in nanophotonics and biomedicine. Specific examples include biosensing via surface-enhanced Raman scattering, fabrication of plasmonic-enhanced solar cells, and water splitting.
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University , University Park, State College, Pennsylvania 16802-6812, United States.
authors.forename: Shikuan
authors.initials: S
authors.lastname: Yang
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University , University Park, State College, Pennsylvania 16802-6812, United States.
authors.forename: Daniel
authors.initials: D
authors.lastname: Slotcavage
authors.affiliation: Department of Mechanical and Biomedical Engineering, City University of Hong Kong , Kowloon, Hong Kong SAR.
authors.forename: John D
authors.initials: JD
authors.lastname: Mai
authors.affiliation: Department of Nuclear Medicine, Lanzhou General Hospital of Lanzhou Military Area Command , Lanzhou 730050, China.
authors.forename: Wansheng
authors.initials: W
authors.lastname: Liang
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University , University Park, State College, Pennsylvania 16802-6812, United States.
authors.forename: Yuliang
authors.initials: Y
authors.lastname: Xie
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University , University Park, State College, Pennsylvania 16802-6812, United States.
authors.forename: Yuchao
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University , University Park, State College, Pennsylvania 16802-6812, United States.
authors.forename: Tony Jun
authors.initials: TJ
authors.lastname: Huang