An optimal substrate design for SERS: dual-scale diamond-shaped gold nano-structures fabricated via interference lithography
Cited 15 times inCited 12 times in
- An optimal substrate design for SERS: dual-scale diamond-shaped gold nano-structures fabricated via interference lithography
- Ahn, Hyo-Jin; Thiyagarajan, Pradheep; Jia, Lin; Kim, Sun-I; Yoon, Jong-Chul; Thomas, Edwin L.; Jang, Ji-Hyun
- Different length scale; Finite-difference time-domain (FDTD) methods; Gold Nanoparticles; Gold nanostructures; Interference lithography; Light-trapping; Multipoles; Plasmon oscillations; Plasmonic; Scale structures; SERS enhancement; Sers enhancement factors; Small size particles; Substrate design; Surface enhanced Raman Scattering (SERS)
- Issue Date
- ROYAL SOC CHEMISTRY
- NANOSCALE, v.5, no.5, pp.1836 - 1842
- Dual-scale diamond-shaped gold nanostructures (d-DGNs) with larger scale diamond-shaped gold nanoposts (DGNs) coupled to smaller scale gold nanoparticles have been fabricated via interference lithography as a highly reliable and efficient substrate for surface enhanced Raman scattering (SERS). The inter-and intra-particle plasmonic fields of d-DGNs are varied by changing the periodicity of the DGNs and the density of gold nanoparticles. Because of the two different length scales in the nanostructures, d-DGNs show multipole plasmonic peaks as well as dipolar plasmonic peaks, leading to a SERS enhancement factor of greater than 10(9). Simulations are carried out by finite-difference time-domain (FDTD) methods to evaluate the dependence of the inter-and intra-particle plasmonic field and the results are in good agreement with the experimentally obtained data. Our studies reveal that the combination of two different length scales is a straightforward approach for achieving reproducible and great SERS enhancement by light trapping in the diamond-shaped larger scale structures as well as efficient collective plasmon oscillation in the small size particles.
- ; Go to Link
Appears in Collections:
- ECHE_Journal Papers
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.