Synthesis of dendritic urethane acrylates for fabricating a robust honeycomb-like structure acting for SERS detection
Journal
Progress in Organic Coatings
Journal Volume
184
Date Issued
2023-11-01
Author(s)
Wang, Kuan Syun
Cheng, Yu Wei
Lin, Han Yu
Chen, Min Hao
Yeh, Shih Chieh
Huang, Ying Chi
Wu, Chien Hsin
Liu, Ting Yu
Abstract
In this study, novel dendritic urethane acrylate polymers were developed for the fabrication of robust honeycomb-like surfaces after exposure to a UV-crosslinking process. Through iterative synthesis based on a highly selective intermediate of 4-isocyanate-4′-(3,3-dimethyl-2,4-dioxo-azetidine)-diphenylmethane, poly(urea/malonamide) dendrons bearing peripheral methyl methacrylate end groups with well-defined structures were realized. A coating solution was prepared by the combined use of 30–70 wt% UA dendron acting as dendritic diluents and dendritic UA copolymers acting as amphiphiles that can fabricate honeycomb-like surfaces via a breath figure self-assembly process using water droplets as templates. The resulting film can be cured under UV light to achieve a robust honeycomb-like structure with a hexagonal structure exhibiting solvent-resistant properties in ethanol. Consequently, this solvent-resistant porous array can act as a substrate for the detection of vanishingly low concentrations of analytes that are aqueous insoluble via surface-enhanced Raman scattering analysis.
Subjects
Dendrimer | Honeycomb | Surface-enhanced Raman spectroscopy | Ultraviolet-curable | Urethane acrylate
SDGs
Type
journal article