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- Title
Reproducible and Bendable SERS Substrates with Tailored Wettability Using Block Copolymers and Anodic Aluminum Oxide Templates.
- Authors
Lin, Yu‐Liang; Karapala, Vamsi Krishna; Shen, Ming‐Hui; Chen, Yi‐Fan; He, Hung‐Chieh; Chang, Chia‐Jui; Chang, Yu‐Ching; Lu, Tien‐Chang; Liau, Ian; Chen, Jiun‐Tai
- 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 ≈0°. Such surfaces play an important role in providing uniform enhanced intensities over large areas (relative standard deviation ≈10%); moreover, these substrates are found to be highly sensitive (limit of detection ≈10−12m 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 ≈30° to 150°.
- Subjects
BLOCK copolymers; ALUMINUM oxide; GENTIAN violet; METHYL methacrylate; WETTING; RAMAN scattering
- Publication
Macromolecular Rapid Communications, 2020, Vol 41, Issue 11, p1
- ISSN
1022-1336
- Publication type
Article
- DOI
10.1002/marc.202000088