title: The fabrication of highly ordered silver nanodot patterns by platinum assisted nanoimprint lithography.
abstract: Silver has been widely used for optical sensing and imaging applications which benefit from localized surface plasmon resonance (LSPR) in a nanoscale configuration. Many attempts have been made to fabricate and control silver nanostructures in order to improve the high performance in sensing and other applications. However, a fatal mechanical weakness of silver and a lack of durability in oxygen-rich conditions have disrupted the manufacturing of reproducible nanostructures by the top-down lithography approach. In this study, we suggest a steady fabrication strategy to obtain highly ordered silver nanopatterns that are able to provide tunable LSPR characteristics. By using a protecting layer of platinum on a silver surface in the lithography process, we successfully obtained large-area (2.7 × 2.7 mm(2)) silver nanopatterns with high reproducibility. This large-area silver nanopattern was capable of enhancing the low concentration of a Cy3 fluorescence signal (∼10(-10) M) which was labeled with DNA oligomers.
authors.affiliation: Department of Chemical and Biomolecular Engineering (BK-21), Korea Advanced Institute of Science and Technology, Daejeon, Korea.
authors.forename: Hae-Wook
authors.initials: HW
authors.lastname: Yoo
authors.forename: Jin-Mi
authors.initials: JM
authors.lastname: Jung
authors.forename: Su-kyung
authors.initials: SK
authors.lastname: Lee
authors.forename: Hee-Tae
authors.initials: HT
authors.lastname: Jung
mesh_terms: D003460:Crystallization / Q000379:methods*; D004247:DNA / Q000032:analysis*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D054118:Nanospheres / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000379:methods*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D012834:Silver; D010984:Platinum; D004247:DNA