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Here, we study optically resonant substrates fabricated using the previously reported BLIN (biotemplated lithography of inorganic nanostructures) technique with single triangle and bowtie DNA origami as templates. We present the first optical characterization of BLIN-fabricated origami-shaped silver nanoparticle patterns on glass surfaces, comprising optical transmission measurements and surface-enhanced Raman spectroscopy. The formed nanoparticle patterns are examined by optical transmission measurements and used for surface enhanced Raman spectroscopy (SERS) of Rhodamine 6G (R6G) dye molecules. Polarization-resolved simulations reveal that the higher SERS enhancement observed for the bowties is primarily due to spectral overlap of the optical resonances with the Raman transitions of R6G. The results manifest the applicability of the BLIN method and substantiate its potential in parallel and high-throughput substrate manufacturing with engineered optical properties. While the results demonstrate the crucial role of the formed nanogaps for SERS, the DNA origami may enable even more complex nanopatterns for various optical applications.
|Number of pages||7|
|Publication status||Published - 14 Jul 2022|
|MoE publication type||A1 Journal article-refereed|
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- 1 Active
Center of Excellence in Life-Inspired Hybrid Materials
Kostiainen, M. & Luotonen, O.
01/01/2022 → 31/12/2024
Project: Academy of Finland: Other research funding
Bioeconomy Research Infrastructure
Jukka Seppälä (Manager)School of Chemical Engineering
Anna Rissanen (Manager)Aalto University
OtaNano - Nanofab
Päivikki Repo (Manager)OtaNano