Fiber-optrode SERS probes using plasmonic silver-coated gold nanostars
Surface-enhanced Raman scattering (SERS)-based molecular sensing has emerged as a powerful tool in a wide variety of fields ranging from environmental monitoring, biomedical diagnostics to security applications. As versatile SERS probes, fiber-optrodes (i.e., a SERS substrate integrated on optical fibers) can simultaneously guide excitation laser and collect the Raman signal, enabling remote and in situ sensing capabilities. This characteristic feature makes fiber-optrodes ideal for hazardous environments or for field-ready applications, where sample manipulation has to be minimal. In this paper, we firstly report the development of a fiber-optrode using silver-coated gold nanostars (Au@Ag NS) as highly enhancing SERS active substrate. These optrodes take advantage of the excellent photonic properties of Au@Ag NS to achieve ultra-sensitive sensing properties. Through the immobilization of the Au@Ag NS nanoparticles and the optimization of the optrode-configuration, the proposed SERS sensor's analytical figures of merit are investigated in detail. The optrode developed herein has a promising prospect for in-field and remote test for trace chemicals and for applications such as direct detection of food additives and biotargets.
Duke Scholars
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Related Subject Headings
- Analytical Chemistry
- 4016 Materials engineering
- 4004 Chemical engineering
- 3401 Analytical chemistry
- 0912 Materials Engineering
- 0301 Analytical Chemistry
- 0205 Optical Physics
Citation
Published In
DOI
ISSN
Publication Date
Volume
Start / End Page
Related Subject Headings
- Analytical Chemistry
- 4016 Materials engineering
- 4004 Chemical engineering
- 3401 Analytical chemistry
- 0912 Materials Engineering
- 0301 Analytical Chemistry
- 0205 Optical Physics