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Large-area and cost-effective fabrication of Ag-coated polymeric nanopillar array for surface-enhanced Raman spectroscopy

Title
Large-area and cost-effective fabrication of Ag-coated polymeric nanopillar array for surface-enhanced Raman spectroscopy
Author
유봉영
Keywords
Surface-enhanced Raman scattering; Silver nanoparticle; Nanopillar array; Anodic aluminum oxide; Reproducibility
Issue Date
2018-07
Publisher
ELSEVIER SCIENCE BV
Citation
APPLIED SURFACE SCIENCE, v. 446, No. Special SI, Page. 114-121
Abstract
The throughput and cost of surface-enhanced Raman scattering (SERS) substrates are considered the main obstacles for widespread commercialization of this spectroscopy technology. Here, we demonstrate a facile, large-area, and cost-effective method for fabricating SERS substrates based on Ag-coated polyurethane acrylate (PUA) nanopillar arrays. Using a multistep anodization-widening and replication process we could cost-effectively produce the shape-controlled nanopillars and observed a unique beer-bottle morphology arranged in large-area of ca. 150 mm x 95 mm. Due to the softness and flexibility of PUA, the porous anodic aluminum oxide (AAO) template was repeatedly reused without requiring etching of the template to improve the reproducibility of nanopillar arrays. When the beer-bottle-shaped nanopillar array was uniformly coated with Ag nanoparticles and then thermally aged at 50 degrees C, the resulting SERS substrate exhibited a high enhancement factor of 2.8 x 10(6) with a low relative standard deviation of 9.0%. The linear sensitivity of our SERS substrate was also demonstrated, indicating that such a method is promising for developing Ag-coated nanopillar arrays suitable for quantitative chemical sensing. (C) 2018 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0169433218304318https://repository.hanyang.ac.kr/handle/20.500.11754/81225
ISSN
0169-4332
DOI
10.1016/j.apsusc.2018.02.088
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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