Stimuli-responsive plasmonic core-satellite hybrid nanostructures with tunable nanogaps
- Title
- Stimuli-responsive plasmonic core-satellite hybrid nanostructures with tunable nanogaps
- Author
- 임동우
- Issue Date
- 2023-02
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY B, v. 11, NO. 8, Page. 1692-1704
- Abstract
- Incorporating stimuli-responsive block copolymers to hierarchical metallic nanoparticles (MNPs) is of particular interest due to their tunable plasmonic properties responding to environmental stimuli. We herein report thermo-responsive plasmonic core-satellite hybrid nanostructures with tunable nanogaps as surface-enhanced Raman scattering (SERS) nanotags. Two different diblock copolymers with opposite charges, poly(acrylic acid-b-N-isopropylacrylamide) (p(AAc-b-NIPAM)) and poly(N,N-dimethylaminoethyl methacrylate-b-N-isopropylacrylamide) (p(DMAEMA-b-NIPAM)), were synthesized. The negatively charged p(AAc-b-NIPAM)s were bound to gold nanospheres (GNSs), while the positively charged p(DMAEMA-b-NIPAM)s were conjugated to gold nanorods (GNRs) via gold-sulfur bonds. When p(AAc-b-NIPAM)-GNSs and p(DMAEMA-b-NIPAM)-GNRs were electrostatically complexed, plasmonic hybrid nanostructures consisting of both GNS satellites and a GNR core were formed. Dynamic tuning of electromagnetic coupling of their nanogaps was achieved via a temperature-triggered conformational change of p(NIPAM) blocks. Furthermore, a sandwich-type immunoassay for the detection of immunoglobulin G was performed to demonstrate these core-satellites as potential SERS nanotags. Our results showed that these plasmonic core-satellites with stimuli-responsiveness are promising for SERS-based biosensing applications.
- URI
- https://pubs.rsc.org/en/content/articlelanding/2023/TB/D2TB02546Ahttps://repository.hanyang.ac.kr/handle/20.500.11754/182870
- ISSN
- 2050-7518;2050-750X
- DOI
- 10.1039/d2tb02546a
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > BIONANO ENGINEERING(생명나노공학과) > Articles
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