Kim, Sung Hyun Jeon, Sangheon Yoo, Dayoung Zhang, Mao Park, Wonjung Kang, Yeojin Choi, Changsoon Hong, Suck Won Lee, Dongyun 2024-01-19T09:31:28Z 2024-01-19T09:31:28Z 2023-06-15 2023-06 https://pubs.kist.re.kr/handle/201004/113681 Plasmonic nanostructured metals have many advantages for applications in high-performance surface-enhanced Raman scattering (SERS) spectroscopy. In particular, unique designing nanostructures with bicontinuous ligaments surrounded by cylindrical voids with tunable dense pores from a few to hundreds of nanometers can be utilized for the high-performance SERS-active substrate. Here, a fabrication strategy is reported to prepare hierarchically arranged micro/nanostructures of wrinkled nanoporous gold (WNPG) films, which involves laminating of the dealloyed Au film on the heat-shrinkable shape-memory polymer film and geometrical modulation of the substrate. As a result, the various types of WNPG films are crafted with a remarkable density of cracks in the structured surface area. Specifically, the WNPG films consisting of multilayered overlapping features are explored and used as the SERS-active substrate. This dual porosity coupled with localized surface plasmon resonance estimated by numerical simulation in a suitable model of bicontinuous ligaments is found to be the core mechanism for the enhancement of SERS sensitivity, which quantitatively characterizes the “hot spots” from the surface to interlayers. These suggested characteristic features are fully assessed by applying a series of dye molecules and DNA strands on the prepared SERS substrate, demonstrating the enhanced intensity of the Raman scattering signals on the optimized WNPG surface. English John Wiley and Sons Ltd Guided Wrinkling of Hierarchically Structured Nanoporous Gold Films for Improved Surface-Enhanced Raman Scattering Performance Article 10.1002/admi.202300212 1 Advanced Materials Interfaces, v.10, no.18 Advanced Materials Interfaces 10 18 Y scie scopus 000995936200001 2-s2.0-85160337631 Chemistry, Multidisciplinary Materials Science, Multidisciplinary Chemistry Materials Science Article GRAPHENE OXIDE EVOLUTION SPECTROSCOPY ARRAYS biosensors nanoporous gold surface-enhanced Raman wrinkled structures