Surface Enhanced Raman Scattering Enhancements from Silver Atomic Layer Deposition Coated Nanowire

Caldwell, Joshua D.; Glembocki, O. J.; Bezares, Francisco J.; Hua, Qi; Kariniemi, Maarit; Prokes, S. M.; Niinistö, Jaakko; Hatanpää, Timo; Ritala, Mikko; Leskelä, Markku; Mastro, Michael A.

doi:10.1364/cleo_si.2011.cmx2

Cited by 2 publications

(1 citation statement)

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“…As an alternative approach, pillar arrays with small height-to-74 diameter aspect ratios may be used. [15][16][17][18]23 These nanopillars 75 enable two types of couplings depending on their geometrical 76 parameters: (i) lateral coupling in between the top of the 77 pillars 23 or (ii) vertical coupling of the metal layers deposited 78 on top of the nanopillars and dewetted gold clusters on the 79 side wall of the nanopillars that typically arise from an 80 inhomogeneous metal deposition process. 15−18 Here, we 81 present SERS substrates fabricated by block copolymer 82 lithography and based on strong vertically coupled plasmonic 83 arrays (VCPAs) between the gold layer on top of the 84 nanopillars and a perforated gold thin film at their base.…”

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confidence: 99%

Block Copolymer Derived Vertically Coupled Plasmonic Arrays for Surface-Enhanced Raman Spectroscopy

Akinoglu

Mir

Gatensby

et al. 2020

ACS Appl. Mater. Interfaces

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A surface-enhanced Raman spectroscopy sensing template consisting of gold-covered nanopillars is developed. The plasmonic slab consists of a perforated gold film at the base of the nanopillars and a Babinet complementary dot array on top of the pillars. The nanopillars were fabricated by the incorporation of an iron salt precursor into a self-assembled block copolymer thin film and subsequent reactive ion etching. The preparation is easy, scalable, and cost-effective. We report on the increase in surfaceenhanced Raman scattering efficiency for smaller pillar heights and stronger coupling between the dot array and perforated gold film with average enhancement factors as high as 10 7 . In addition, the block copolymer-derived templates show an excellent relative standard deviation of 8% in the measurement of the Raman intensity. Finite difference time domain simulations were performed to investigate the nature of the electromagnetic near-field enhancement and to identify plasmonic hot spots.

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confidence: 99%