title: Engineering 3D Nanoplasmonic Assemblies for High Performance Spectroscopic Sensing.
abstract: We demonstrate the fabrication of plasmonic sensors that comprise gold nanopillar arrays exhibiting high surface areas, and narrow gaps, through self-assembly of amphiphilic diblock copolymer micelles on silicon substrates. Silicon nanopillars with high integrity over arbitrary large areas are obtained using copolymer micelles as lithographic templates. The gaps between metal features are controlled by varying the thickness of the evaporated gold. The resulting gold metal nanopillar arrays exhibit an engineered surface topography, together with uniform and controlled separations down to sub-10 nm suitable for highly sensitive detection of molecular analytes by Surface Enhanced Raman Spectroscopy (SERS). The significance of the approach is demonstrated through the control exercised at each step, including template preparation and pattern-transfer steps. The approach is a promising means to address trade-offs between resolutions, throughput, and performance in the fabrication of nanoplasmonic assemblies for sensing applications.
authors.affiliation: Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 3, Research Link, Singapore 117602, Singapore.|Department of Biotechnology, School of Pharmaceutical Sciences, Siksha O Anushandan University (SOA) , Bhubaneswar, 751030, India.
authors.forename: S
authors.initials: S
authors.lastname: Dinda
authors.affiliation: Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 3, Research Link, Singapore 117602, Singapore.
authors.forename: V
authors.initials: V
authors.lastname: Suresh
authors.affiliation: Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 3, Research Link, Singapore 117602, Singapore.|Singapore Bio imaging Consortium (SBIC), Biomedical Sciences Institutes , 11 Biopolis Way, #02-02, Helios 138667, Singapore.
authors.forename: P
authors.initials: P
authors.lastname: Thoniyot
authors.affiliation: Centre for Micro-Photonics, Faculty of Science Engineering and Technology, Swinburne University of Technology , Hawthorn, VIC 3122, Australia.|Institute of Physics, Centre for Physical Sciences and Technology , 231 Savanoriu Avenue, LT-02300 Vilnius, Lithuania.
authors.forename: A
authors.initials: A
authors.lastname: Balčytis
authors.affiliation: Centre for Micro-Photonics, Faculty of Science Engineering and Technology, Swinburne University of Technology , Hawthorn, VIC 3122, Australia.
authors.forename: S
authors.initials: S
authors.lastname: Juodkazis
authors.affiliation: Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 3, Research Link, Singapore 117602, Singapore.|Nano-Enabled Medicine and Cosmetics Group, Materials Research and Technology (MRT), Luxembourg Institute of Science and Technology (LIST) , 41, Rue du Brill, L-4422, Belvaux, Luxembourg.
authors.forename: S
authors.initials: S
authors.lastname: Krishnamoorthy
keywords: nanopillar; plasmonic nanoarrays; self-assembly; sensing; surface enhanced raman spectroscopy (SERS)