Reproducible and Bendable SERS Substrates with Tailored Wettability Using Block Copolymers and Anodic Aluminum Oxide Templates

Yu-Liang Lin, Vamsi Krishna Karapala, Ming-Hui Shen, Yi-Fan Chen, Hung-Chieh He, Chia-Jui Chang, Yu-Ching Chang, Tien-Chang Lu, Ian Liau, Jiun-Tai Chen*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Surface properties are essential for substrates exhibiting high sensitivity in surface-enhanced Raman scattering (SERS) applications. In this work, novel SERS hybrid substrates using polystyrene-block-poly(methyl methacrylate) and anodic aluminum oxide templates is presented. The hybrid substrates not only possess hierarchical porous nanostructures but also exhibit superhydrophilic surface properties with the water contact angle approximate to 0 degrees. Such surfaces play an important role in providing uniform enhanced intensities over large areas (relative standard deviation approximate to 10%); moreover, these substrates are found to be highly sensitive (limit of detection approximate to 10(-12) m for rhodamine 6G (R6G)). The results show that the hybrid SERS substrates can achieve the simultaneous detection of multicomponent mixtures of different target molecules, such as R6G, crystal violet, and methylene blue. Furthermore, the bending experiments show that about 70% of the SERS intensities are maintained after bending from approximate to 30 degrees to 150 degrees.

Original languageEnglish
Article number2000088
Number of pages9
JournalMacromolecular Rapid Communications
DOIs
StatePublished - 24 Apr 2020

Keywords

  • anodic aluminum oxide
  • block copolymers
  • gold nanoparticles
  • surface-enhanced Raman scattering
  • wettability
  • ENHANCED RAMAN-SCATTERING
  • GOLD NANOPARTICLES
  • CAVITY ARRAYS
  • NANOSTRUCTURES
  • LITHOGRAPHY
  • POLYSTYRENE
  • ORIENTATION
  • SENSITIVITY
  • SURFACES
  • BRUSHES

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